Troubleshooting guide

5-46
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-02
Chapter 5 Troubleshooting Switch Router ATM Interface Connections
Troubleshooting CES T1 and CES E1 Interfaces
Table 5-1 describes the Port status and Active defect errors the might appear, the cause of the error, and
a recommended solution.
If you determine that the physical interface is configured incorrectly, refer to the “Configuring
Interfaces” chapter in the ATM Switch Router Software Configuration Guide.
If the configuration of the interface is not the problem, use the information in OAM Loopback Testing,
page 5-9 to configure a hard loopback to test the interface.
Next, see the Using the debug Commands to Troubleshoot an Interface, page 5-19 to further troubleshoot
the interface.
If the interface is still not operating correctly, proceed with the troubleshooting process in Chapter 6,
“Troubleshooting Switch Router ATM Network Connections.”
Troubleshooting CES T1 and CES E1 Interfaces
This section describes specific processes and commands used to troubleshoot T1 and E1 circuit
emulation service (CES) port adapters.
uicell
9
ais
10
secs: (Alarm
Indication Signal)
(Major) An AIS indicates an alarm raised on a line
upstream from the ATM switch router.
1. Check the status of the adjacent
network device to determine if the
problem is there. If the problem is not in
the adjacent network device, go to Step 2.
2. Ask your service provider to trace the
source of the AIS signal.
ferf
11
secs: RAI indicates a problem between the
ATM switch router interface transmitter
and the far end receiver, but it may not be
in the segment between the ATM switch
router and the adjacent node.
1. Connect an external loopback cable to
the port. If there are no alarms, the
problem is not with the ATM switch
router.
2. Examine adjacent network devices and
check for LOS or LOF alarms.
1. lcv = Line Code Violation
2. ferr = framing bit error event counter
3. bee = CRC-6 in ESF, Framing bit error in SF
4. febe = Far-End Block Error
5. b1 = PLCP BIP errors
6. fe = PLCP framing pattern octet errors
7. plcp_febe = PLCP FEBE errors
8. hcs = uncorrectable HEC errors
9. uicell= unassigned/idle cells dropped
10. ais = Alarm Indication Signal
11. FERF (far-end receive failure) and RAI (remote alarm indication) are equivalent.
Table 5-10 DS3 and E3 Port Adapter show controller Display (continued)
Field
Indication
(Severity) Error and Cause Recommendation