OmniSwitch OS6860/OS6900/OS10K Troubleshooting Guide Part No.032996-00 Rev.A
AOS Release 7.X and 8.X January 2015
Alcatel-Lucent Page 32 of 148
Tx :
Bytes Xmitted : 614365318, Unicast Frames : 5726870,
Broadcast Frames: 45986, M-cast Frames : 425461,
UnderSize Frames: 0, OverSize Frames: 0,
Lost Frames : 0, Collided Frames: 0,
Error Frames : 0
The below grep options is available on 7X/8X to find out which ports are going up and down at present. The
output below shows that the port 1/1/4 has flapped 3655 times and port 1/1/10 has flapped 2656 times.
-> show interfaces | grep Number
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 3655,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 2656,
Number of Status Change: 1,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 0,
Number of Status Change: 0,
To determine if ports are actively flapping, start by using the “show system” command to check the current
time and then use the below command to see which ports are currently flapping.
The output below shows that the port 1/1/4 and 1/1/10 has flapped recently.
-> show interfaces | grep Last
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 13 13:20:20 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 13 13:20:14 2015,
Last Time Link Changed : Wed Jan 1 02:58:05 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Last Time Link Changed : Wed Jan 1 00:54:14 2015,
Scenario 2:
b). TCNs are received by the switch (at least 1 every 1 to 4 minutes) for one or more VLANs. In order to track
down which VLAN and port the TCNs are received on (causing the global MAC aging timer to restart).
Use the below command to find out which VLAN is receiving the TCNs
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