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This chapter describes the Operation, Administration, and Maintenance (OAM) implementation on the ATM switch router.
This chapter includes the following sections:
OAM performs fault management and performance management functions at the ATM management (M)-plane layer.
The ATM switch router has full support for the following ATM OAM cell flows:
In addition to the standard OAM functions, the ATM switch router can also send OAM pings. OAM cells containing the ATM node addresses or IP addresses of intermediate switches allow network administrators to determine the integrity of a chosen connection at any intermediate point along the connection, allowing for network connection debugging and troubleshooting.
OAM software implements ATM Layer F4 and F5 OAM fault management functions. OAM performs standard loopback (end-to-end or segment) and fault detection and notification (AIS and 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:
The hardware can perform the following functions on OAM cells:
An ATM connection consists of a group of network points that form the edges of each ATM switch or end system.
Each point can be one of the following:
The following sections describe the OAM tasks:
This section describes OAM commands in EXEC, global, and interface configuration mode.
To enable OAM operations for the Catalyst 8540 MSR, use the global configuration command, as shown in the following table:
| Command | Purpose |
|---|---|
atm oam [ais] [end-loopback] | Enables or disables OAM operations for the entire switch. |
The following example shows how to enable AIS and segment loopback for the entire switch:
Switch(config)# atm oam ais seg-loopback % OAM: Switch level seg loopback is enabled % OAM: Switch level ais is enabled
The following example shows how to configure the ATM OAM connection maximum to 1600:
Switch(config)# atm oam max-limit 1600
To enable OAM operations for the entire Catalyst 8510 MSR and LightStream 1010 ATM switch router, use the global configuration command, as shown in the following table:
| Command | Purpose |
|---|---|
atm oam [ais] [end-loopback] | Enables or disables OAM operations for the entire switch. |
The following example shows how to enable AIS and segment loopback for the entire switch:
Switch(config)# atm oam ais seg-loopback % OAM: Switch level seg loopback is enabled % OAM: Switch level ais is enabled
The following example shows how to configure the ATM OAM connection maximum to 1600:
Switch(config)# atm oam max-limit 1600
The following example shows how to enable OAM AIS and end-to-end loopback on interface 3/0/0:
Switch(config)# interface atm 3/0/0 Switch(config-if)# atm oam ais end-loopback % OAM: Interface level end to end loopback is enabled % OAM: Interface level ais is enabled
The following example shows how to enable OAM AIS and end-to-end loopback on interface 3/0/0, VPI = 50, VCI = 100:
Switch(config)# interface atm 3/0/0 Switch(config-if)# atm oam 50 100 ais end-loopback % OAM: Connection level end to end loopback is enabled % OAM: Connection level ais is enabled
Switch(config)# interface atm 3/0/0 Switch(config-if)# no atm oam interface atm 1/0/0 ais % OAM: Interface level ais is disabled
To check ATM connection reachability and network connectivity on the Catalyst 8540 MSR, use the EXEC command, as shown in the following table:
| Command | Purpose |
|---|---|
ping atm interface atm card/subcard/port vpi [vci] {end-loopback [destination] | seg-loopback [destination]} | Checks the connection. |
You can ping a neighbor switch by selecting the segment loopback option. In privileged EXEC mode, you can select various other parameters such as repeat count and timeout values.
Switch# ping atm interface atm 3/0/0 50 100 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 0 percent (0/5)
Switch# ping Protocol [ip]: atm Interface [card/sub-card/port]: 3/0/0 VPI [0]: 0 VCI [0]: 16 Send OAM-Segment-Loopback ? [no]: Target IP address: Target NSAP Prefix: Repeat count [5]: Timeout in seconds [5]: Type escape sequence to abort. Sending end-Loopback 5, 53-byte OAM Echoes to a connection end point, timeout is 5 seconds: ..... Success rate is 0 percent (0/5)
To check ATM connection reachability and network connectivity on the Catalyst 8510 MSR and LightStream 1010 ATM switch router, use the EXEC command, as shown in the following table:
| Command | Purpose |
|---|---|
ping atm interface atm card/subcard/port vpi [vci] {[atm-prefix prefix] | end-loopback [destination] | ip-address ip-address | seg-loopback [destination]} | Checks the connection. |
You can use either an ATM address prefix or an IP address as a ping destination. You can ping a neighbor switch by selecting the segment loopback option. In privileged EXEC mode, you can select various other parameters such as repeat count and timeout values.
Switch# ping atm interface atm 3/0/0 50 100 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 0 percent (0/5)
Switch# ping Protocol [ip]: atm Interface [card/sub-card/port]: 3/0/0 VPI [0]: 0 VCI [0]: 16 Send OAM-Segment-Loopback ? [no]: Target IP address: Target NSAP Prefix: Repeat count [5]: Timeout in seconds [5]: Type escape sequence to abort. Sending end-Loopback 5, 53-byte OAM Echoes to a connection end point, timeout is 5 seconds: ..... Success rate is 0 percent (0/5)
To display the OAM configuration, use the following EXEC command:
| Command | Purpose |
|---|---|
more system:running-config | Displays the OAM configuration. |
The OAM configuration is displayed in the following example:
Switch# more system:running-config
Building configuration...
Current configuration:
!
version XX.X
no service pad
service udp-small-servers
service tcp-small-servers
!
hostname Switch
!
boot system flash slot0:rhino/ls1010-wi-m_1.083.bin.Z
!
ip rcmd remote-username doug
atm oam max-limit 1600
atm over-subscription-factor 16
atm service-category-limit cbr 3000
atm qos uni3-default cbr max-cell-loss-ratio 12
atm lecs-address 47.0091.0000.0000.0000.0000.0000.0000.0000.0000.00
atm address 47.0091.8100.0000.0060.3e5a.db01.0060.3e5a.db01.00
!
interface ATM0/0/0
no keepalive
map-group atm-1
no atm auto-configuration
no atm address-registration
no atm ilmi-enable
no atm ilmi-lecs-implied
atm iisp side user
atm pvp 99
atm oam 0 5 seg-loopback end-loopback rdi
atm oam 0 16 seg-loopback end-loopback rdi
atm oam 0 18 seg-loopback end-loopback rdi
!
interface ATM0/0/0.99 point-to-point
no atm auto-configuration
no atm address-registration
no atm ilmi-enable
no atm ilmi-lecs-implied
atm maxvp-number 0
atm oam 99 5 end-loopback rdi
atm oam 99 16 end-loopback rdi
atm oam 99 18 end-loopback rdi
!
interface ATM0/0/1
no keepalive
--More--
<information deleted>
Posted: Mon May 8 18:23:05 PDT 2000
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