- Alcatel Internetworking, Inc. Switch Troubleshooting Guide

Troubleshooting Source Learning Troubleshooting a Source Learning Problem
OmniSwitch Troubleshooting Guide September 2005 page 3-3
Troubleshooting a Source Learning Problem
In order to troubleshoot a source learning problem the first step is to verify that the physical link is up and
the port has correctly auto-negotiated with the end-station.
The next thing is to verify that the port is a member of the right VLAN, if a port is statically configured
for a VLAN, or the Group Mobility policies are correctly defined. The workstation configuration should
also be verified.
The first thing to look for is the MAC address table to verify that the MAC address is being learned:
-> show mac-address-table
Vlan Mac Address Type Protocol Operation Interface
------+-------------------+--------------+-----------+------------+-----------
105 00:00:5e:00:01:69 learned 10800 bridging 4/2
105 00:d0:95:6b:4c:d8 learned 10800 bridging 4/2
105 00:d0:95:79:62:eb learned 10806 bridging 4/2
150 00:d0:95:6b:4c:e7 learned 10800 bridging 4/2
1 00:d0:95:79:65:ea learned 10800 bridging 6/1
108 00:d0:95:6b:4c:db learned 10800 bridging 6/1
110 00:d0:95:6b:4c:dd learned 10800 bridging 7/1
114 00:c0:4f:12:f7:1b learned 10800 bridging 8/23
112 00:d0:95:6b:4c:df learned 10800 bridging 9/2
112 00:d0:95:79:65:10 learned 10806 bridging 9/2
50 00:00:5e:00:01:32 learned 10800 bridging 11/1
50 00:d0:95:83:e7:81 learned 10800 bridging 11/1
51 00:00:5e:00:01:33 learned 10800 bridging 11/1
51 00:d0:95:83:e7:82 learned 10800 bridging 11/1
52 00:00:5e:00:01:34 learned 10800 bridging 11/1
52 00:d0:95:83:e7:83 learned 10800 bridging 11/1
53 00:00:5e:00:01:35 learned 10800 bridging 11/1
53 00:d0:95:83:e7:84 learned 10800 bridging 11/1
54 00:00:5e:00:01:36 learned 10800 bridging 11/1
54 00:d0:95:83:e7:85 learned 10800 bridging 11/1
55 00:00:5e:00:01:37 learned 10800 bridging 11/1
55 00:d0:95:83:e7:86 learned 10800 bridging 11/1
56 00:00:5e:00:01:38 learned 10800 bridging 11/1
56 00:d0:95:83:e7:87 learned 10800 bridging 11/1
57 00:00:5e:00:01:39 learned 10800 bridging 11/1
57 00:d0:95:83:e7:88 learned 10800 bridging 11/1
58 00:00:5e:00:01:3a learned 10800 bridging 11/1
58 00:d0:95:83:e7:89 learned 10800 bridging 11/1
59 00:00:5e:00:01:3b learned 10800 bridging 11/1
59 00:d0:95:83:e7:8a learned 10800 bridging 11/1
60 00:00:5e:00:01:3c learned 10800 bridging 11/1
60 00:d0:95:83:e7:8b learned 10800 bridging 11/1
61 00:00:5e:00:01:3d learned 10800 bridging 11/1
61 00:d0:95:83:e7:8c learned 10800 bridging 11/1
62 00:00:5e:00:01:3e learned 10800 bridging 11/1
62 00:d0:95:83:e7:8d learned 10800 bridging 11/1
114 00:10:a4:b5:b5:38 learned 10806 bridging 16/16
Total number of Valid MAC addresses above = 37
The above command shows all the MAC addresses learned by the switch.