Troubleshooting guide

13-29
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 13 Troubleshooting ATM Router Module Connections
Troubleshooting OAM on ATM Router Module Connections
interface ATM10/0/1.5 point-to-point
ip address 11.1.5.1 255.255.255.252
no ip directed-broadcast
atm pvc 2 105 pd on interface ATM0/0/0 0 105
atm oam interface ATM0/0/0 0 105 end-loopback
!
Step 3 At router c7576-1, use the show atm traffic command to confirm the F5 OAM cells are being received.
c7576-1# show atm traffic
.
(Information Deleted)
.
348 OAM cells received
F5 InEndloop: 348, […]
586 OAM cells sent
F5 OutEndloop: 586, […]
Step 4 At router c7576-1, use the show atm traffic command again, to confirm the F5 OAM cells are
incrementing.
c7576-1# show atm traffic
.
(Information Deleted)
.
397 OAM cells received
F5 InEndloop: 397, […]
635 OAM cells sent
F5 OutEndloop: 635, […]
Step 5 At router c8540-1, use the show atm vc interfaces atm command with the VPI and VCI parameters to
confirm the ATM router module subinterface status and configuration.
c8540-1# show atm vc interfaces atm 10/0/1.5 2 105
Interface: ATM10/0/1, Type: arm_port
VPI = 2 VCI = 105
Status: UP
Time-since-last-status-change: 00:34:41
Connection-type: PVC
.
(Information Deleted)
.
Cross-connect OAM-configuration: End-to-end-loopback-on
Cross-connect OAM-state: OAM-Up
OAM-Loopback-Tx-Interval: 5
Step 6 Check the Status field. It should be UP.
Step 7 Check the Time-since-last-status-change field. It should indicate the time since you enabled OAM on the
subinterface.
Step 8 Check the Cross-connect OAM-configuration field. It should indicate End-to-end-loopback-on.
Step 9 Check the Cross-connect OAM-state field. It should indicate OAM-Up.
Step 10 To demonstrate an OAM failure, delete the PVC between switch router c8540-1 and switch router
c8540-2 from the switch router c8540-2 end of the PVC.
c8540-2(config-if)# no atm pvc 0 105 int atm 1/0/1 0 105
Step 11 At router c7576-1, a system error message appears as in the following:
c7576-1#00:43:55: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0.5, changed
state to down