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This chapter provides troubleshooting information about connectivity and performance problems in the physical interfaces of an ATM switch.
The chapter includes with the following sections:
This procedure outlines the steps for performing basic interface checks and verifies that an ATM switch interface is enabled and functions correctly.
Always check the following when an interface fails:
Use the following command to check ATM physical interface configuration:
| Command | Task |
|---|---|
show interface atm card/subcard/port | Show the ATM interface configuration. |
Use the following steps to troubleshoot the physical interface:
Step 1 Use the show interface atm card/subcard/port command to display status and error information about an interface.
Switch#show interface atm 1/0/0
ATM1/0/0 is up, line protocol is upHardware is oc3suniMTU 4470 bytes, sub MTU 4470, BW 156250 Kbit, DLY 0 usec, rely 255/255, load 1/255
Encapsulation ATM, loopback not set, keepalive not supported
Last input 00:00:00, output 00:00:00, output hang neverLast clearing of "show interface" counters neverQueueing strategy: fifoOutput queue 0/40, 0 drops; input queue 0/75, 0 drops5 minute input rate 0 bits/sec, 0 packets/sec5 minute output rate 0 bits/sec, 0 packets/sec527152 packets input, 27939056 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort527246 packets output, 27944038 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets0 output buffer failures, 0 output buffers swapped outSwitch#
Step 2 Check the ATM or constant bit rate (CBR) field. The interface should be up.
If down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable.
Step 3 Check the line protocol field. The status should be up.
If down, check for the following:
Step 4 Check the Encapsulation field. Confirm that the encapsulation method matches the interface type.
Step 5 Check the last input and last output fields. This indicates the number of hours, minutes, and seconds since the last packet was successfully received or transmitted by the interface.
Step 6 Check the output hang field. This indicates the number of hours, minutes, and seconds since the last reset caused by a transmission that took too long.
Step 7 Check the cyclic redundancy check (CRC) field. The presence of many CRC errors but not many collisions is an indication of excessive noise. If the number is too high, check the cables to determine if any are damaged. If you are using unshielded twisted-pair(UTP) cables, make sure you are using category 5 cable and not another type, such as category 3.
Step 8 Check the collisions field. This value indicates the total number of collisions compared to the total number of output packets and should be approximately 0.1 percent or less. If the number is too high:
If you determine that the physical interface is configured incorrectly, go to the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
If you still have not determined the problem, continue with the next phase of basic interface troubleshooting.
This procedure outlines the steps used to determine if the cell rate for an interface is correctly configured.
Use the following command to check the cell rate on a physical interface:
| Command | Task |
|---|---|
show atm interface atm card/subcard/port | Confirm the status of the physical interface. |
Use the following steps to check the cell rate of the interface:
Step 1 Use the show atm interface atm command to display information about an interface.
Switch# show atm interface atm 1/0/0 Interface: ATM1/0/0 Port-type: oc3suniIF Status: UP Admin Status: up Auto-config: enabled AutoCfgState: completed IF-Side: Network IF-type: NNI Uni-type: not applicable Uni-version: not applicable Max-VPI-bits: 8 Max-VCI-bits: 14 Max-VP: 255 Max-VC: 16383 ConfMaxSvpcVpi: 255 CurrMaxSvpcVpi: 255 ConfMaxSvccVpi: 255 CurrMaxSvccVpi: 255 ConfMinSvccVci: 33 CurrMinSvccVci: 33 Svc Upc Intent: pass Signalling: Enabled ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2a81.4000.0c80.8000.00 Configured virtual links: PVCLs SoftVCLs SVCLs TVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Inst-Conns 4 0 0 0 0 0 0 4 4 Logical ports(VP-tunnels): 0
Input cells: 528135 Output cells: 528235
5 minute input rate: 0 bits/sec, 0 cells/sec
5 minute output rate: 0 bits/sec, 0 cells/sec
Input AAL5 pkts: 344844, Output AAL5 pkts: 344878, AAL5 crc errors: 0 Switch#
Step 2 Check the IF Status (Interface Status) and Admin Status (Administration Status) fields. They should be up.
If down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable.
Step 3 Check the input cells and output cells fields. If the errors and the input and output difference exceeds 0.5 to 2.0 percent of traffic on the interface, the interface is experiencing congestion and dropping cells.
Step 4 Check the AAL5 CRC errors field. If the errors and the input and output difference exceeds 0.5 to 2.0 percent of traffic on the interface, check the following:
If you determine that the physical interface is configured incorrectly, go to the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
If you still have not determined the problem, continue with the next phase of basic interface troubleshooting.
To check ATM connection reachability and network connectivity, use the atm ping command in either privilege or user mode. You can use either an IP address or an ATM address prefix as a ping destination. You can also ping a neighbor switch by selecting the segment loopback option. In privilege extended command mode, you can select other parameters such as repeat count and timeout values.
| Command | Task |
|---|---|
ping atm interface atm card/sub-card/port vpi vci {[atm-prefix prefix] | [end-loopback] | [ip-address address] | [seg-loopback]} | Use to check the connection. |
Use the following steps to ping a specific ATM prefix in both normal and extended mode:
Step 1 Use the ping atm interface atm command, in normal mode, to confirm connectivity through a specific interface to an ATM address prefix.
Switch# ping atm interface atm 1/0/0 0 5 atm-prefix 47.009181000000000000000001 Type escape sequence to abort. Sending 5, 53-byte OAM Echoes to 47.0091.8100.0000.0000.0000.0001..., timeout is 5 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms Switch#
Step 2 Check the Success rate field. It should be 100 percent. If not, check the interface configuration.
Step 3 Use the ping atm interface atm command, in extended mode, to confirm connectivity through a specific interface to an ATM address prefix and modify the default repeat or timout.
Switch# ping Protocol [ip]: atm Interface [card/sub-card/port]: 1/0/0 VPI [0]: 0 VCI [0]: 5 Send OAM-Segment-Loopback ? [no]: Target IP address: Target NSAP Prefix: 47.009181000000000000000001 Repeat count [5]: Timeout in seconds [5]:10 Type escape sequence to abort. Sending 5, 53-byte OAM Echoes to 47.0091.8100.0000.0000.0000.0001..., timeout is 10 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms Switch#
Step 4 Check the Success rate field. It should be 100 percent. If not, check the interface configuration.
If the success rate is less than 100 percent, refer to the chapter "Configuring Port Adapter Module Interfaces," of the LightStream 1010 ATM Switch Software Configuration Guide and confirm the interface configuration.
OAM performs fault management and performance management functions at ATM management-plane (M-plane) layer.
The LightStream 1010 has full support for the following ATM OAM cell flows:
You can configure both F4 and F5 flows as either end-to-end or segment-loopback, and they can be used with alarm indication signal (AIS) and remote defect indication (RDI) functions.
In addition to the standard OAM functions, the ATM switch can also send OAM pings. See the section "Determining Network Connectivity." Using OAM cells containing the ATM node addresses or IP addresses of intermediate switches, you can determine the integrity of a chosen connection at any intermediate point along that connection. With this information, you can debug and troubleshoot the network connection.
OAM software implements ATM Layer F4 and F5 OAM fault management functions. OAM performs standard loopback (end-to-end or segment) fault detection and notification alarm indication signal (AIS) and remote detect indicator (RDI) for each connection. It also maintains a group of timers for the OAM functions. When there is an OAM state change such as loopback failure, OAM software notifies the connection management software. The network operator can enable or disable OAM operation for the following switch components:
If OAM operation is disabled, outgoing OAM cells are not generated, and all incoming OAM cells will be discarded.
To support various OAM operations, the LightStream 1010 switch hardware provides OAM cell routing functions on a per-connection basis for each direction and for different OAM cell spans (segment and end-to-end). The hardware OAM cell routing determines the destination of an OAM cell received from the link or the network and then determines whether or not OAM cells are processed by the ATM switch software.
The hardware can perform the following functions on OAM cells:
An ATM connection consists of a group of network points, which are the edges of each ATM switch or end system.
Each point can be one of the following:
Figure 4-1 shows the various loopback operations available.
OAM AIS, RDI, and loopback operations are enabled or disabled for the entire switch using the EXEC commands. Use the optional interface atm parameter to configure OAM on a specific connection.
You can use the loopback test to pinpoint faults by looping a signal at various points in the network. Use the loopback test before and after the initiation of service. Figure 4-2 shows how ATM OAM cell loopbacks are performed first across the interface and then across different segments of the connection.
An ATM switch generates the OAM cells and forwards them to another network element, which is responsible for returning them to the generating network elements.
Each loopback cell contains the ID of the generating network element and the ID of the network element that is looping the cells back to the originator. Any intermediate site must pass the cells on to the loopback site (the farthest point to which the cells progress), and the generating site (the point to which the cells return).
See the appendix "ATM Cell Structures" for a format description of the OAM loopback cell.
The LightStream 1010 ATM switch provides the following three types of loopback tests:
The following examples show how to perform loopback tests on the interfaces shown in Figure 4-3.
If users connected to the Catalyst 5000 in the manufacturing building are not able to connect to the other users outside their building including the DNS server in the administration building, you should try a loopback test. The ATM switch connections should be tested using the procedures described in the following section.
Use the atm ping command to confirm the ATM connection between the administration and manufacturing buildings.
| Command | Task |
|---|---|
configure | At the privileged EXEC prompt, enter configuration mode from the terminal. |
interface atm card/subcard/port [.vpt #] | Select the interface to be configured. |
ping atm interface atm card/sub-card/port vpi vci [atm-prefix prefix] | [end-loopback] | [ip-address address] | [seg-loopback]} | Check the interface connection. |
The interface loopback tests should be performed in the following order:
Test 1---Segment network-side loopback between ATM switch AdminFl1Ls1, interface 0/1/0 and ATM switch ManuFl1Ls1, interface 4/0/1
Test 2---Segment link-side loopback between the DNS server and ATM switch AdminFl1Ls1, interface 4/0/0
Test 3---End-to-end loopback between the DNS server and the Catalyst 5000 Fast Ethernet switch, ManuFl1CaS1, interface 1/1
Use the following steps to ping the ATM virtual channel path 30 between the administration and manufacturing buildings with a segment loopback signal in normal mode:
Step 1 Use the ping atm interface atm card/subcard/port command to confirm the VP connectivity.
AdminFl1Ls1# ping atm interface atm 0/1/0 30 seg-loopback Type escape sequence to abort. Sending Seg-Loopback 5, 53-byte OAM Echoes to a neighbor, timeout is 5 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms AdminFl1Ls1#
Step 2 Use same command to ping the ATM virtual channel path 30 between the administration and manufacturing buildings with a segment loopback signal in normal mode:
AdminFl1Ls1# ping atm interface atm 0/1/0 30 seg-loopback Type escape sequence to abort. Sending Seg-Loopback 5, 53-byte OAM Echoes to a neighbor, timeout is 5 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms AdminFl1Ls1#
Step 3 Check the Success rate field. If the success rate is less that 100 percent, there is a problem on the 622-Mbps connection between the administration and manufacturing buildings.
Step 4 Check the cables and the interface configuration using the procedures in the section Performing Basic Interface Checks.
If the Success rate is 100 percent, then this segment of the connection is not the problem. Continue with the next phase of the interface loopback test.
Log in to the LightStream1010 ATM switch in the manufacturing building and use the atm ping command again to confirm the ATM connection between the ATM switch and the Catalyst 5000 switches in the manufacturing buildings.
Use the following steps to ping the ATM virtual channel path 2 between the ATM and Catalyst 5000 switches in the manufacturing building with a segment loopback signal in normal mode:
Step 1 Use the ping atm interface atm card/subcard/port command to confirm the VP connectivity.
ManuFl1Ls1# ping atm interface atm 4/0/1 2 end-loopback Type escape sequence to abort. Sending End-Loopback 5, 53-byte OAM Echoes to a neighbor, timeout is 5 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms ManuFl1Ls1#
Step 2 Check the Success rate field. If the success rate is less that 100 percent, there is a problem on the OC3 155-Mbps connection between the ATM switch and the Catalyst 5000 switch in the manufacturing building.
Step 3 Check the cables and the interface configuration using the procedures in the section "Performing Basic Interface Checks" earlier in this chapter.
If the success rate is 100 percent, then this segment of the connection is not the problem. Continue with the next phase of the interface loopback test.
Check the end-to-end connection between the DNS server and the Catalyst 5000 switch in the manufacturing building.
The following example pings the entire ATM virtual channel path between the administration and manufacturing buildings with an end-to-end loopback signal in normal mode:
Step 1 Use the ping atm interface atm card/subcard/port command to confirm the VP connectivity.
AdminFl1Ls1# ping atm interface atm 3/1/0 2 seg-loopback Type escape sequence to abort. Sending Seg-Loopback 5, 53-byte OAM Echoes to a neighbor, timeout is 5 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms AdminFl1Ls1#
Step 2 Check the Success rate field. If the success rate is less that 100 percent, there is a problem on the OC-3 155-Mbps connection between the ATM switch and the Catalyst 5000 switch in the manufacturing building.
Step 3 Check the cables and the interface configuration using the procedures in the section "Performing Basic Interface Checks."
If the success rate is 100 percent then this segment of the connection is not the problem. Continue with the next phase of the interface test in the section "Using the debug Commands to Troubleshoot an Interface."
The debug privileged EXEC commands can provide a wealth of information about the traffic being seen (or not seen) on an interface.
For detailed information about using the debug commands, see the appendix "Debugging an ATM Switch."
To isolate problems and troubleshoot the physical connections of the switch use the following debug commands in EXEC mode. Use the no version of the these commands to disable debugging:
| Command | Task |
|---|---|
debug ports {aal5 [interface atm card/subcard/port]| dcu | ds3e3 | netclock | oc12 | oc3 | t1e1} | Start debugging at the driver level for a specific port. |
Start debugging using generic OAM cells. | |
Start debugging using OAM packets. | |
Starts debugging to display all ATM errors | |
Disable all debugging. |
Refer to the chapter "Configuring Port Adapter Module Interfaces," of the LightStream 1010 ATM Switch Software Configuration Guide and confirm the interface configuration.
This section describes specific processes and commands used to troubleshoot the 155-Mbps and 622- Mbps port adapters.
The port adapter faceplate LEDs provide status information about the individual 155- and 622-single-mode and multimode fiber-optic and UTP interface connections of the port adapter. The LEDs are described in Table 4-1.
| LED | Status | Description |
|---|---|---|
Off | LOS1 or port adapter is shutdown. | |
Off | No transmit line activity indication. |
| 1LOS = loss of signal. 2LOF = loss of frame. 3LCD = loss of cell delineation. 4AIS = alarm indication signal. 5FERF = far-end receive failure. |
To display the interface configuration, use the following commands:
| Command | Task |
|---|---|
show interface atm card/subcard/port | Show the interface. |
show atm interface atm card/subcard/port | Show the interface. |
show controllers atm card/subcard/port | Show the interface memory management and error counters. |
Follow these steps to display the configuration of a 155-Mbps or 622-Mbps interface:
Step 1 Use the show interface atm card/subcard/port command to confirm the configuration.
Switch# show interface atm 1/0/0ATM1/0/0 is up, line protocol is up Hardware is oc3suni MTU 4470 bytes, sub MTU 4470, BW 156250 Kbit, DLY 0 usec, rely 255/255, load 1/255
Encapsulation ATM, loopback not set, keepalive not supported
Last input 00:00:00, output 00:00:00, output hang never Last clearing of "show interface" counters never Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 2000 bits/sec, 6 packets/sec 5 minute output rate 3000 bits/sec, 9 packets/sec 4703704 packets input, 249296312 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
54 input errors, 55 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 5737496 packets output, 304087288 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out Switch#
Step 2 Check the ATM field. The interface should be up.
If down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable.
Step 3 Check the line protocol field. The status should be up.
If down, check for the following:
Step 4 Check the Encapsulation field. Confirm the encapsulation method matches the interface type.
Step 5 Check the Last input or Last output fields. This indicates the number of hours, minutes, and seconds since the last packet was successfully received or transmitted by the interface.
Step 6 Check the output hang field. This indicates the number of hours, minutes, and seconds since the last reset caused by a transmission that took too long.
Step 7 Check the CRC field. The presence of many CRC errors but not many collisions is an indication of excessive noise. If the number is too high, check the cables to determine if any are damaged. If you are using UTP cable, make sure you are using category 5 cables and not another type, such as category 3.
Step 8 Check the Collisions field. This indicates the total number of collisions compared to the total number of output packets, and it should be approximately 0.1 percent or less. If the number is too high:
If you determine that the physical interface is configured incorrectly, go to the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
Follow these steps to show how to troubleshoot the configuration of a 155-Mbps or 622-Mbps interface:
Step 1 Use the show atm interface atm card/subcard/port command to confirm the configuration.
Switch# show atm interface atm 1/0/0 Interface: ATM1/0/0 Port-type: oc3suniIF Status: UP Admin Status: up Auto-config: enabled AutoCfgState: completed IF-Side: Network IF-type: UNI Uni-type: Private Uni-version: V3.1 Max-VPI-bits: 2 Max-VCI-bits: 10 Max-VP: 255 Max-VC: 16383 ConfMaxSvpcVpi: 255 CurrMaxSvpcVpi: 3 ConfMaxSvccVpi: 255 CurrMaxSvccVpi: 3 ConfMinSvccVci: 33 CurrMinSvccVci: 33 Svc Upc Intent: pass Signalling: Enabled ATM Address for Soft VC: 47.0091.8100.0000.0000.0000.0001.4000.0c80.8000.00 Configured virtual links: PVCLs SoftVCLs SVCLs TVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Inst-Conns 2 0 12 0 0 0 0 14 16 Logical ports(VP-tunnels): 0
Input cells: 4703972 Output cells: 5737883 5 minute input rate: 2000 bits/sec, 4 cells/sec 5 minute output rate: 4000 bits/sec, 9 cells/sec
Input AAL5 pkts: 169899, Output AAL5 pkts: 644764, AAL5 crc errors: 0 Switch#
Step 2 Check the IF (Interface) Status and Admin (Administration) Status fields. They should be up.
If down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable.
Step 3 Check the Input cells and the Output cells fields. If the errors and the input and output difference exceeds 0.5 to 2.0 percent of traffic on the interface, the interface is experiencing congestion and dropping cells.
Step 4 Check the AAL5 crc error field. If the errors and the input and the output difference exceeds 0.5 to 2.0 percent of traffic on the interface, check the following:
If you determine that the physical interface is configured incorrectly, refer to the chapter "Configuring Port Adapter Interfaces" in the publication LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
Follow these steps to display the memory management and error counters of a 155-Mbps or 622-Mbps ATM interface:
Step 1 Use the show controllers atm card/subcard/port command to confirm memory management and error counters.
Switch# show controllers atm 1/0/0 IF Name: ATM1/0/0 Chip Base Address: A8A08000 Port type: OC3 Port rate: 155 Mbps Port medium: MM FiberPort status:Good Signal Loopback:None Flags:8308
TX Led: Traffic Pattern RX Led: Traffic Pattern TX clock source: network-derived Framing mode: sts-3c Cell payload scrambling on Sts-stream scrambling on OC3 counters: Key: txcell - # cells transmitted rxcell - # cells received b1 - # section BIP-8 errors b2 - # line BIP-8 errors b3 - # path BIP-8 errors ocd - # out-of-cell delineation errors - not implemented g1 - # path FEBE errors z2 - # line FEBE errors chcs - # correctable HEC errors uhcs - # uncorrectable HEC errors <Information Deleted> phy_tx_cnt:4789577, phy_rx_cnt:4704918 Switch#
Step 2 Check the Port status field. It should read "Good Signal."
Step 3 Check the Loopback field. It should read "None."
Step 4 Check the TX Led field. It should read "Traffic Pattern." If not check Table 4-1 for LED descriptions.
Step 5 Check the RX Led field. It should read "Traffic Pattern." If not check Table 4-1 for LED descriptions.
If you determine that the physical interface is configured incorrectly, go to the section "Configuring 155-Mbps SM, MM, and UTP Interfaces," or "Configuring 622-Mbps SM and MM Interfaces," in the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide, for configuration information.
If the interface is still not operating correctly continue with the troubleshooting process in the "Troubleshooting ATM Switch Network Connections" chapter.
This section describes specific processes and commands used to troubleshoot the T1 and E1 port adapters.
The port adapter faceplate LEDs provide status information for individual T1 and E1 coaxial and UTP interface connections of the port adapter. The LEDs are described in Table 4-2.
| LED | Status | Description |
|---|---|---|
Off | Carrier detect signal is not received. | |
Off | LOS1 or port adapter is shutdown. | |
Off | No transmit line activity indication. |
| 1LOS = loss of signal. 2LOF = loss of frame. 3LCD = loss of cell delineation. 4AIS = alarm indication signal. 5FERF = far-end receive failure. |
To display the T1 and E1 interface configuration, use the following commands:
| Command | Task |
|---|---|
show interface atm card/subcard/port | Show the interface. |
show atm interface atm card/subcard/port | Show the interface. |
show controllers atm card/subcard/port | Show the interface memory management and error counters. |
Follow these steps to display the configuration of a T1 or E1interface:
Step 1 Use the show interface atm card/subcard/port command to confirm the configuration.
Switch# show interface atm 0/1/0ATM0/1/0 is down, line protocol is down Hardware is t1suni MTU 4470 bytes, sub MTU 0, BW 1500 Kbit, DLY 0 usec, rely 0/255, load 1/255
Encapsulation ATM, loopback not set, keepalive not supported
Last input never, output never, output hang never Last clearing of "show interface" counters never Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out Switch#
Step 2 Check the ATM field. The interface should be up.
If the interface is down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable.
Step 3 Check the line protocol field. The status should be up.
If the status is down, check for the following:
Step 4 Check the Encapsulation field. Confirm that the encapsulation method matches the interface type.
Step 5 Check the Last input or Last output fields. These values indicate the number of hours, minutes, and seconds since the last packet was successfully received or transmitted by the interface.
Step 6 Check the output hang field. This value indicates the number of hours, minutes, and seconds since the last reset caused by a transmission that took too long.
Step 7 Check the CRC field. The presence of many CRC errors but not many collisions is an indication of excessive noise. If the number is too high, check the cables to determine if any are damaged. If you are using UTP cables, make sure you are using category 5 cables and not another type, such as category 3.
Step 8 Check the collisions field. This value indicates the total number of collisions compared to the total number of output packets, and it should be approximately 0.1 percent or less. If the number is too high:
If you determine that the physical interface is configured incorrectly, go to the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
Follow these steps to show how to troubleshoot the configuration of a T1 or E1 interface:
Step 1 Use the show atm interface atm card/subcard/port command to confirm the configuration.
Switch# show atm interface atm 0/1/0 Interface: ATM0/1/0 Port-type: t1suniIF Status: DOWN Admin Status: down Auto-config: enabled AutoCfgState: waiting for response from peer IF-Side: Network IF-type: UNI Uni-type: Private Uni-version: V3.0 Max-VPI-bits: 8 Max-VCI-bits: 14 Max-VP: 255 Max-VC: 16383 ConfMaxSvpcVpi: 255 CurrMaxSvpcVpi: 255 ConfMaxSvccVpi: 255 CurrMaxSvccVpi: 255 ConfMinSvccVci: 33 CurrMinSvccVci: 33 Svc Upc Intent: pass Signalling: Enabled ATM Address for Soft VC: 47.0091.8100.0000.0000.0000.0001.4000.0c80.1000.00 Configured virtual links: PVCLs SoftVCLs SVCLs TVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Inst-Conns 2 0 0 0 0 0 0 2 0 Logical ports(VP-tunnels): 0
Input cells: 0 Output cells: 0 5 minute input rate: 0 bits/sec, 0 cells/sec 5 minute output rate: 0 bits/sec, 0 cells/sec
Input AAL5 pkts: 0, Output AAL5 pkts: 0, AAL5 crc errors: 0 Switch#
Step 2 Check the IF (Interface) Status and Admin (Administration) Status field. They should be up.
If the interface is down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable.
Step 3 Check the Input cells and Output cells fields. If the errors and the input and output difference exceeds 0.5 to 2.0 percent of traffic on the interface, the interface is experiencing congestion and dropping cells.
Step 4 Check the AAL5 crc error field. If the errors and the input and the output difference exceeds 0.5 to 2.0 percent of traffic on the interface, check the following:
If you determine that the physical interface is configured incorrectly, go to the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
Follow these steps to display the memory management and error counters of a T1 or E1 ATM interface:
Step 1 Use the show controllers atm card/subcard/port command to confirm memory management and error counters.
Switch# show controllers atm 0/1/0 IF Name: ATM0/1/0, SUNI PDH Chip Base Address: A8908000 IF Name: ATM0/1/0, framer Base Address: A8909000 Port type: T1 Port rate: 1.5 Mbps Port medium: UTPPort status:Good signal Loopback:None Flags:8000 showdow clk reg value AA
TX Led: Traffic Pattern RX Led: Traffic Pattern CD Led: off TX clock source: network-derived T1 Framing Mode: ESF PLCP format FERF on AIS is on FERF on LCD is on (n/a in PLCP mode) FERF on RED is on FERF on OOF is on FERF on LOS is on LBO: between 0-110 Counters: Key: txcell - # cells transmitted rxcell - # cells received lcv - # line code violations ferr - # framing bit error event counter bee - # bit error event, CRC-6 in ESF, Framing bit error in SF b1 - # PLCP BIP errors fe - # PLCP framing pattern octet errors plcp_febe- # PLCP FEBE errors hcs - # uncorrectable HEC errors uicell - # unassigned/idle cells dropped <Information Deleted> Dump of internal registers for mask 9 9 9 9 1 1 0 0 Switch#
Step 2 Check the Port status field. It should read "Good Signal."
Step 3 Check the Loopback field. It should read "None."
Step 4 Check the TX Led field. It should read "Traffic Pattern." If not check Table 4-2 for LED descriptions.
Step 5 Check the RX Led field. It should read "Traffic Pattern." If not check Table 4-2 for LED descriptions.
Step 6 Check the CD field. It should read "Traffic Pattern." If not check Table 4-2 for LED descriptions.
If you determine that the physical interface is configured incorrectly, go to the section "Configuring T1/E1 Trunk Interfaces," in the chapter "Configuring Port Adapter Interfaces," of the LightStream 1010 ATM Switch Software Configuration Guide, for configuration information.
If the interface is still not operating correctly continue with the troubleshooting process in the "Troubleshooting ATM Switch Network Connections" chapter.
This section describes specific processes and commands used to troubleshoot the DS3 and E3 port adapter.
The port adapter faceplate LEDs provide status information for individual DS3 and E3 coaxial interface connections of the port adapter. The LEDs are described in Table 4-3.
| LED | Status | Description |
|---|---|---|
Off | Carrier detect signal is not received. | |
Off | LOS1 or port adapter is shutdown. | |
Off | No transmit line activity indication. |
| 1LOS = loss of signal. 2LOF = loss of frame. 3LCD = loss of cell delineation. 4AIS = alarm indication signal. 5FERF = far-end receive failure. |
To display the DS3 and E3 interface configuration, use the following commands:
| Command | Task |
|---|---|
show interface atm card/subcard/port | Show the interface. |
show atm interface atm card/subcard/port | Show the interface. |
show controllers atm card/subcard/port | Show the interface memory management and error counters. |
Follow these steps to display the configuration of a DS3 or E3 interface:
Step 1 Use the show interface atm card/subcard/port command to confirm the configuration.
Switch# show interface atm 0/1/0ATM0/1/0 is down, line protocol is down Hardware is ds3suni_Quad MTU 4470 bytes, sub MTU 4470, BW 45000 Kbit, DLY 0 usec, rely 0/255, load 1/255
Encapsulation ATM, loopback not set, keepalive not supported
Last input never, output never, output hang never Last clearing of "show interface" counters never Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out Switch#
Step 2 Check the ATM field. The interface should be up.
If the interface is down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable the interface.
Step 3 Check the line protocol field. The status should be up.
If interface is down, check for the following:
Step 4 Check the Encapsulation field. Confirm the encapsulation method matches the interface type.
Step 5 Check the Last input or the Last output fields. These values indicates the number of hours, minutes, and seconds since the last packet was successfully received or transmitted by the interface.
Step 6 Check the output hang field. This value indicates the number of hours, minutes, and seconds since the last reset caused by a transmission that took too long.
Step 7 Check the CRC field. The presence of many CRC errors but not many collisions is an indication of excessive noise. If the number is too high, check the cables to determine if any are damaged. If you are using UTP cables, make sure you are using category 5 cables and not another type, such as category 3.
Step 8 Check the Collisions field. This value indicates the total number of collisions compared to the total number of output packets and should be approximately 0.1 percent or less. If the number is too high:
If you determine that the physical interface is configured incorrectly, go to the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
Follow these steps to show how to troubleshoot the configuration of a DS3 or E3 interface:
Step 1 Use the show atm interface atm card/subcard/port command to confirm the configuration.
Switch# show atm interface atm 0/1/0 Interface: ATM0/1/0 Port-type: ds3suni_QuadIF Status: UP Admin Status: up Auto-config: enabled AutoCfgState: waiting for response from peer IF-Side: Network IF-type: UNI Uni-type: Private Uni-version: V3.0 Max-VPI-bits: 8 Max-VCI-bits: 14 Max-VP: 255 Max-VC: 16383 ConfMaxSvpcVpi: 255 CurrMaxSvpcVpi: 255 ConfMaxSvccVpi: 255 CurrMaxSvccVpi: 255 ConfMinSvccVci: 33 CurrMinSvccVci: 33 Svc Upc Intent: pass Signalling: Enabled ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2a81.4000.0c80.1000.00 Configured virtual links: PVCLs SoftVCLs SVCLs TVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Inst-Conns 2 0 0 0 0 0 0 2 0 Logical ports(VP-tunnels): 0
Input cells: 0 Output cells: 0 5 minute input rate: 0 bits/sec, 0 cells/sec 5 minute output rate: 0 bits/sec, 0 cells/sec
Input AAL5 pkts: 0, Output AAL5 pkts: 0, AAL5 crc errors: 0 Switch#
Step 2 Check the IF (Interface) Status and Admin (Administration) Status field. They should be UP.
If the interface is down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable.
Step 3 Check the Input cells and Output cells fields. If the errors and the input and output difference exceeds 0.5 to 2.0 percent of traffic on the interface, the interface is experiencing congestion and dropping cells.
Step 4 Check the AAL5 crc error field. If the errors and the input and output difference exceeds 0.5 to 2.0 percent of traffic on the interface, check the following:
If you determine that the physical interface is configured incorrectly, go to the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
Follow these steps to display the memory management and error counters of a DS3 or E3 ATM interface:
Step 1 Use the show controllers atm card/subcard/port command to confirm memory management and error counters.
Switch# show controllers atm 0/1/0 IF Name: ATM0/1/0, Chip Base Address: A8908000 Port type: DS3 Port rate: 45 Mbps Port medium: CoaxPort status:Good Signal Loopback:None Flags:8000
TX Led: Traffic Pattern RX Led: Traffic Pattern TX clock source: network-de rived DS3 Framing Mode: cbit adm FERF on AIS is on FERF on LCD is on (n/a in PLCP mode) FERF on RED is on FERF on OOF is on FERF on LOS is on LBO: <= 225' PDH counters: Key: txcell - # cells transmitted rxcell - # cells received lcv - # line code violations ferr - DS3: # F-bit/M-bit errors; E3: # framing errors exzs_ier - T3: # excessive zeros; E3 G.832: # iec errors perr - DS3: # P-bit errors; E3 G.832: # BIP-8 errors cperr - DS3: # path parity errors febe - DS3 or E3 G.832: # FEBE errors b1 - # PLCP BIP errors fe - # PLCP framing pattern octet errors plcp_febe- # PLCP FEBE errors hcs - # uncorrectable HEC errors uicell - # unassigned/idle cells dropped <Information Deleted> Netclock Reg1 Shadow:55, Netclock Reg2 Shadow:1, Interrupt Status:DF, ASP ClkSel:C7FF Switch#
Step 2 Check the Port status field. It should read "Good signal."
Step 3 Check the Loopback field. It should read "None."
Step 4 Check the TX Led field. It should read "Traffic Pattern." If not check Table 4-3 for LED descriptions.
Step 5 Check the RX Led field. It should read "Traffic Pattern." If not check Table 4-3 for LED descriptions.
If you determine that the physical interface is configured incorrectly, go to the section "Configuring DS3 and E3 Interfaces" in the chapter "Configuring Port Adapter Interfaces" in the publication LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
If the interface is still not operating correctly continue with the troubleshooting process in the chapter "Troubleshooting ATM Switch Network Connections."
This section describes specific processes and commands used to troubleshoot the CBR T1 and E1 circuit emulation port adapter.
The port adapter faceplate LEDs provide status information for individual CBR T1 and CBR E1 UTP and coaxial interface connections of the port adapter. The LEDs are described in Table 4-4.
| LED | Status | Description |
|---|---|---|
Off | LOS1 or port adapter is shutdown. | |
Off | No transmit line activity indication. |
| 1LOS = loss of signal. 2LOF = loss of frame. 3LCD = loss of cell delineation. 4AIS = alarm indication signal. 5FERF = far-end receive failure. |
To display the CBR T1 and CBR E1 interface configuration, use the following commands:
| Command | Task |
|---|---|
show interface cbr card/subcard/port | Show the interface. |
show ces interface atm card/subcard/port | Show the interface. |
Follow these steps to display the configuration of a CBR interface:
Step 1 Use the show interface cbr card/subcard/port command to confirm the configuration.
Switch# show interface cbr 3/0/0CBR3/0/0 is up, line protocol is up Hardware is DCU MTU 53 bytes, BW 1544 Kbit, DLY 0 usec, rely 0/255, load 1/255
Encapsulation ATMCES-T1, loopback not set Last input never, output never, output hang never Last clearing of "show interface" counters never Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out Switch#
Step 2 Check the CBR field. The interface should be up.
If the interface is down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable.
Step 3 Check the line protocol field. The status should be up.
If the interface is down, check for the following:
Step 4 Check the Encapsulation field. Confirm that the encapsulation method matches the interface type.
Step 5 Check the Last input or the Last output fields. These values indicates the number of hours, minutes, and seconds since the last packet was successfully received or transmitted by the interface.
Step 6 Check the output hang field. This value indicates the number of hours, minutes, and seconds since the last reset caused by a transmission that took too long.
Step 7 Check the CRC field. The presence of many CRC errors but not many collisions is an indication of excessive noise. If the number is too high, check the cables to determine if any are damaged. If you are using UTP cables, make sure you are using category 5 cables and not another type, such as category 3.
Step 8 Check the Collisions field. This indicates the total number of collisions compared to the total number of output packets and should be approximately 0.1 percent or less. If the number is too high:
If you determine that the physical interface is configured incorrectly, go to the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
Follow these steps to troubleshoot the configuration of a CBR interface:
Step 1 Use the show ces interface cbr card/subcard/port command to confirm the configuration.
Switch# show ces interface cbr 3/0/0 Interface: CBR3/0/0 Port-type:T1-DCUIF Status: UP Admin Status: UP Channels in use on this port: LineType: ESF LineCoding: B8ZS LoopConfig: NoLoop SignalMode: NoSignalling XmtClockSrc: network-derived DataFormat: UnStructured AAL1 Clocking Mode: Synchronous LineLength: 0_110 LineState: XmtAIS LossOfSignal Errors in the Current Interval: PCVs 0 LCVs 0 ESs 0 SESs 0 SEFSs 0 UASs 0 CSSs 0 LESs 0 BESs 0 DMs 0 Errors in the last 24Hrs: PCVs 0 LCVs 0 ESs 0 SESs 0 SEFSs 0 UASs 0 CSSs 0 LESs 0 BESs 0 DMs 0
Input Counters: 0 cells, 0 bytes
Output Counters: 0 cells, 0 bytes Switch#
Step 2 Check the IF (Interface) Status and Admin (Administration) Status field. They should be up.
If the interface is down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable.
Step 3 Check the input counters and output counters fields. If the errors and the input and output difference exceeds 0.5 to 2.0 percent of traffic on the interface, the interface is experiencing congestion and dropping cells.
If you determine that the physical interface is configured incorrectly, go to the section "Configuring CES/T1 and E1 Interfaces," in the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide, for configuration information.
If the interface is still not operating correctly continue with the troubleshooting process in the "Troubleshooting ATM Switch Network Connections" chapter.
This section describes specific processes and commands used to troubleshoot the 25-Mbps port adapter.
The port adapter faceplate LEDs provide status information for individual 25-Mbps UTP interface connections of the port adapter. The LEDs are described in Table 4-5.
| LED | Status | Description |
|---|---|---|
Off | No receive line activity indication. |
| 1FERF = far-end receive failure. 2LOF = loss of frame. 3LCD = loss of cell delineation. |
To display the 25-Mbps interface configuration, use the following commands:
| Command | Task |
|---|---|
show interface atm card/subcard/port | Show the interface. |
show atm interface atm card/subcard/port | Show the interface. |
show controllers atm card/subcard/port | Show the interface memory management and error counters. |
Follow these steps to display the configuration of a 25-Mbps interface:
Step 1 Use the show interface atm card/subcard/port command to confirm the configuration.
Switch# show interface atm 1/0/0ATM1/0/0 is UP, line protocol is UP Hardware is ATM25 MTU 4470 bytes, sub MTU 4470, BW 25600 Kbit, DLY 0 usec, rely 0/255, load 1/255
Encapsulation ATM, loopback not set, keepalive not supported
Last input never, output never, output hang never Last clearing of "show interface" counters never Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 0 packets input, 0 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets 0 output buffer failures, 0 output buffers swapped out Switch#
Step 2 Check the ATM field. The interface should be up.
If the interface is down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable.
Step 3 Check the line protocol field. The status should be up.
If the interface is down, check for the following:
Step 4 Check the Encapsulation field. Confirm the encapsulation method matches the interface type.
Step 5 Check the Last input or the Last output fields. These values indicate the number of hours, minutes, and seconds since the last packet was successfully received or transmitted by the interface.
Step 6 Check the output hang field. This value indicates the number of hours, minutes, and seconds since the last reset caused by a transmission that took too long.
Step 7 Check the CRC field. The presence of many CRC errors but not many collisions is an indication of excessive noise. If the number is too high, check the cables to determine if any are damaged. If you are using UTP cables, make sure you are using category 5 cables and not another type, such as category 3.
Step 8 Check the Collisions field. This indicates the total number of collisions compared to the total number of output packets and should be approximately 0.1 percent or less. If the number is too high:
If you determine that the physical interface is configured incorrectly, go to the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
Follow these steps to show how to troubleshoot the configuration of a 25-Mbps interface:
Step 1 Use the show atm interface atm card/subcard/port command to confirm the configuration.
Switch# show atm interface atm 1/0/0Interface: ATM1/0/0 Port-type: ATM25
IF Status: UP Admin Status: up Auto-config: enabled AutoCfgState: waiting for response from peer IF-Side: Network IF-type: UNI Uni-type: Private Uni-version: V3.0 Max-VPI-bits: 2 Max-VCI-bits: 14 Max-VP: 4 Max-VC: 16383 Svc Upc Intent: pass Signalling: Enabled ATM Address for Soft VC: 47.0091.8100.0000.00e0.4fac.b401.4000.0c84.8000.00 Configured virtual links: PVCLs SoftVCLs SVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Installed-Conns 2 0 0 0 0 0 2 0 Logical ports(VP-tunnels): 0 Input cells: 0 Output cells: 0 5 minute input rate: 0 bits/sec, 0 cells/sec 5 minute output rate: 0 bits/sec, 0 cells/sec
Input AAL5 pkts: 0, Output AAL5 pkts: 0, AAL5 crc errors: 0 Switch# Switch#
Step 2 Check the IF (Interface) Status and Admin (Administration) Status field. They should be up.
If the interface is down, check for the following:
If administratively down, the interface has been administratively taken down. Use the no shutdown interface configuration command to reenable.
Step 3 Check the Input cells and the Output cells fields. If the errors and the input and output difference exceeds 0.5 to 2.0 percent of traffic on the interface, the interface is experiencing congestion and dropping cells.
Step 4 Check the AAL5 crc error field. If the errors and the input and output difference exceeds 0.5 to 2.0 percent of traffic on the interface, check the following:
If you determine that the physical interface is configured incorrectly, go to the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide for configuration information.
Follow these steps to display the memory management and error counters of a 25-Mbps ATM interface:
Step 1 Use the show controllers atm card/subcard/port command to confirm memory management and error counters.
Switch# show controllers atm 1/0/0 IF Name: ATM1/0/0 Chip Base Address: A880C000 Port type: ATM25 Port rate: 25 Mbps Port medium: UTP srst 0x00, mode1 0xF0, mode2 0x80, mode3 0x80, ch_cntrl_6 0xC5, ch_cntrl_5 0xC4, ch_cntrl_4 0xC3, ch_cntrl_3 0xC2, ch_cntrl_2 0xC1, ch_cntrl_1 0xC0, mode4 0x3B, testpat 0x00, linkres 0x60, minlp1 0x88, minlp2 0x88, ln 0x00, lrw_lra_hi 0x00, lra_lo 0x00, ls_hi 0xFF, ls_lo 0xFF, ld_hi 0x00, ld_lo 0x00, lstatus 0x00, tx_ctrl 0x40, flb 0x00, led6c_5c 0x00, led4c_3c 0x00, led2c_1c 0x00, glerr 0x3F, status6 0x0A, event6 0x01, imask6 0x3F, status5 0x0A, event5 0x01, imask5 0x3F, status4 0x0A, event4 0x01, imask4 0x3F, status3 0x0A, event3 0x01, imask3 0x3F, status2 0x0A, event2 0x01, imask2 0x3F, status1 0x0A, event1 0x01, imask1 0x3F, tx_err_status 0x00, tx_err_event 0x00, tx_err_imask 0x01, mpd 0x00, cb_hi 0x00, cb_mid 0x00, cb_lo 0x00, dropc:0, roto:0, 5bcode:1, rbful:0, rbad:0, freqe:155538 Switch#
Step 2 Check the Port status field. It should read "Good signal."
Step 3 Check the Loopback field. It should read `None."
Step 4 Check the TX Led field. It should read "Traffic Pattern." If not check Table 4-5 for LED descriptions.
Step 5 Check the RX Led field. It should read "Traffic Pattern." If not check Table 4-5 for LED descriptions.
If you determine that the physical interface is configured incorrectly, go to the section "Configuring 25-Mbps Interfaces," in the chapter "Configuring Port Adapter Interfaces," in the LightStream 1010 ATM Switch Software Configuration Guide, for configuration information.
If the interface is still not operating correctly continue with the troubleshooting process in the chapter "Troubleshooting ATM Switch Network Connections."
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