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This feature module describes the PA-MC-T3 Multi-Channel T3 port adapter (PA-MC-T3 [=]), which can now be configured as either customer equipment or network equipment.
This document includes the following sections:
The addition of the equipment {customer | network} loopback command enables you to configure the PA-T3-MC as network equipment or customer equipment so it can operate based on the ANSI T1.403 standard. When a PA-MC-T3 is configured as Customer Equipment, all loopback requests are honored. When configured as network equipment the PA-MC-T3 ignores the following DS-3 and DS-1 loopback requests:
When configured as network equipment, the PA-MC-T3 recognizes router network loop commands as line loopback commands.
Simple Network Management Protocol (SNMP) requests for loopbacks are always honored, whether the PA-MC-T3 is configured as customer equipment or network equipment.
The PA-MC-T3 port adapter now provides the following key benefits. With the addition of the ability to configure the PA-MC-T3 as network equipment or customer equipment, the PA-MC-T3 no longer responds to in-band control-line loopback codes when configured as customer equipment. The PA-MC-T3 can now disable network (line and payload) loopbacks on both the T3 and T1 connections. This prevents customers from setting loopbacks at the network end. This feature is useful for all router equipment deployed as network equipment that interfaces with customer equipment.
Standards
MIBs
No new or modified MIBs are supported by this feature.
For descriptions of supported MIBs and how to use MIBs, see the Cisco MIB web site on CCO at: http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.
RFCs
See the following sections for configuration tasks for the PA-MC-T3 equipment loopback command. Each task in the list indicates if the task is optional or required.
A T3 Controller must be selected before other configuration commands can be enabled.
| Command | Purpose |
|---|---|
Router(config)# controller t3 slot/port-adapter/port | Selects a T3 controller. |
Perform the following steps to configure each logical channel group:
| Step | Commands | Purpose |
|---|---|---|
Step 1 | Router(config)# controller t3 slot/port-adapter-port | Selects a T3 controller. |
Step 2 | Router(config-controller)# t1 line channel-group number timeslots range | Configures the T1 line with a value of 1 to 3 in a logical channel group (values are 0 to 23) and specifies the timeslots (values are 1 to 24). |
To verify the interface, T1 line and T3 controller configurations, perform the following steps:
Step 2 Enter the show controllers t3 command to in privileged EXEC mode to display information for all 28 T1 lines within each T3 port adapter in the router.
This section provides the following configuration examples:
In the following example, a Cisco 7206 and a Cisco 7505 are networked. The Cisco 7206 is configured as customer equipment and the loopback remote line fdl ansi command is honored:
7206_2(config-controller)# equipment customer loopback
7206_2(config-controller)# t1 1 loopback remote line fdl ansi
7206_2# show controllers t3 3/0/1
T3 3/0 is up. Hardware is CT3 single wide port adapter
CT3 H/W Version : 1.0.1, CT3 ROM Version : 1.1, CT3 F/W Version : 2.1.1
FREEDM version: 1, reset 0
T1 1 is up
timeslots: 1-24
FDL per AT&T 54016 spec.
Configured for FDL remotely line looped (ansi)
No alarms detected.
Framing is ESF, Clock Source is Internal
Data in current interval (135 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
7206_2# show interface serial 3/0/1:0
Serial3/0/1:0 is up, line protocol is up (looped)
Hardware is CT3 Single Wide One Port
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input 00:00:04, output never, output hang never
Last clearing of "show interface" counters 00:03:22
Input queue: 0/75/0 (size/max/drops); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/64/0 (size/threshold/drops)
Conversations 0/1 (active/max active)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
20 packets input, 480 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
20 packets output, 480 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffers copied, 0 interrupts, 0 failures
0 carrier transitions no alarm present
Timeslot(s) Used: 1-24, subrate: 64Kb/s, transmit delay is 0 flags
non-inverted data
04:27:46: %LINK-3-LOOPSTATUS: Interface on T3 1/1/0/1, is looped toward the network
7505#show controllers t3 1/1/0/1
T3 1/1/0 is up. Hardware is CT3 single wide port adapter
CT3 H/W Version : 1.0.1, CT3 ROM Version: 1.1, CT3 F/W Version: 2.2.1
FREEDM version: 1, reset 0
T1 1 is up
timeslots: 1-24
FDL per AT&T 54016 spec.
Currently in External Network Line Looped
Receiver has no alarms.
Framing is ESF, Clock Source is Internal
Data in current interval (506 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs
0 Unavail Secs, 0 Stuffed Secs
In the following example, a Cisco 7206 series router and a Cisco 7505 series router are networked. The Cisco 7206 series router is configured as network equipment and the loopback remote command is ignored when it is issued from the Cisco 7505 series router:
7206_2(config-controller)# equipment network loopback
7505_2(config-controller)# loopback remote
7206_2# show controllers t3 3/0
T3 3/0 is up. (Configured for Remotely Looped) Hardware is CT3 single wide port adapter
CT3 H/W Version : 1.0.1, CT3 ROM Version : 1.1, CT3 F/W Version : 2.1.1
FREEDM version: 1, reset 0
Applique type is Channelized T3
Receiver has loss of signal.
MDL transmission is disabled
FEAC code received: No code is being received
Framing is C-BIT Parity, Line Code is B3ZS, Clock Source is Internal
Rx throttle total 0
Data in current interval (0 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation, 0 P-bit Err Secs
0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
0 Unavailable Secs, 0 Line Errored Secs
0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
7206_2# show interface serial 3/0/1:0
Serial3/0/1:0 is up, line protocol is up
Hardware is CT3 Single Wide One Port
Internet address is 70.50.1.2/24
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input 00:00:06, output never, output hang never
Last clearing of "show interface" counters 00:01:55
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
18 packets input, 1470 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
16 packets output, 784 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffers copied, 0 interrupts, 0 failures
0 carrier transitions no alarm present
Timeslot(s) Used: 1-24, subrate: 64Kb/s, transmit delay is 0 flags
non-inverted data
7505# show controllers t3 1/1/0
T3 1/1/0 is up. Hardware is CT3 single wide port adapter
CT3 H/W Version : 1.0.1, CT3 ROM Version: 1.1, CT3 F/W Version: 2.2.1
FREEDM version: 1, reset 0
Applique type is Channelized T3
No alarms detected.
MDL transmission is disabled
FEAC code received: No code is being received
Framing is C-BIT Parity, Line Code is B3ZS, Clock Source is Internal
Rx throttle total 0, equipment type NE
Data in current interval (34 seconds elapsed):
0 Line Code Violations, 0 P-bit Coding Violation
0 C-bit Coding Violation, 0 P-bit Err Secs
0 P-bit Severely Err Secs, 0 Severely Err Framing Secs
0 Unavailable Secs, 0 Line Errored Secs
0 C-bit Errored Secs, 0 C-bit Severely Errored Secs
This section documents the new command that configures the Equipment feature. All other commands used with PA-MC-T3 are documented in the Cisco IOS Release 12.0 command reference publications.
In Cisco IOS Release 12.0(1)T or later, you can search and filter the output for show and more commands. This functionality is useful when you need to sort through large amounts of output, or if you want to exclude output that you do not need to see.
To use this functionality, enter a show or more command followed by the "pipe" character (|), one of the keywords begin, include, or exclude, and an expression that you want to search or filter on:
command | {begin | include | exclude} regular-expressionFollowing is an example of the show atm vc command in which you want the command output to begin with the first line where the expression "PeakRate" appears:
show atm vc | begin PeakRateFor more information on the search and filter functionality, refer to the Cisco IOS Release 12.0(1)T feature module titled CLI String Search.
To configure the PA-MC-T3 as network equipment or customer equipment, use the equipment {customer | network} loopback configuration controller command. To return to the default setting, use the no form of this command.
equipment {customer | network} loopback
Syntax Description
customer Configures the PA-MC-T3 as customer equipment. network Configures the PA-MC-T3 as network equipment.
Defaults
Customer equipment
Command Modes
Configuration controller
Command History
12.0(7)XE1 This command was introduced.
Release
Modification
Usage Guidelines
Use this command to configure the PA-MC-T3 as network equipment or customer equipment so it operates according to the T1.403 ANSI standard, allowing equipment configured as network equipment to disregard network loopback commands.
Examples
The following example configures the PA-MC-T3 as network equipment:
equipment network
Posted: Fri Feb 4 11:07:00 PST 2000
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