08-21-2007 07:40 AM - edited 03-05-2019 06:01 PM
I am configuring a stack of 3 3750's with the stackwise technology. I have noticed with CNA that it sometimes reports a 16 Gbps speed stack and sometimes a 32 Gbps stack. Right now it is reporting 16 Gbps. I assume it has something to do with the stacking ports.
Here is what the switch reports now:
ncrplan01#sh switch stack-ports
Switch # Port 1 Port 2
-------- ------ ------
1 Ok Down
2 Ok Ok
3 Down Ok
All ports have stacking cables in a looped fashion. I don't see any commands for bringing up the "Down" stacking ports. What am I missing?
08-21-2007 08:08 AM
Barry
Am I correct in assuming that there is a cable from stack port 2 on switch 1 to stack port 1 on switch 3? Is it possible that this cable connecting 1 to 3 is not quite fully connected? Or is it possible that the cable is faulty?
With both paths active you should get 32 Gbps and with only a single active path you would get 16. And the down stack ports on switch 1 and 3 mean that you have only a single path at this point.
HTH
Rick
08-21-2007 09:30 AM
OK! This is kinda weird. I disconnected the cable from 3 to 1 and then just pushed it back on. This brought the the link from 3 to 1. When I screwed it in, the link went down again. In order to get it back up, I have to back off the screws a few turns :-(
ncrplan01#
000051: Aug 21 17:25:33.540: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 3 has changed to state UP
000052: Aug 21 17:25:33.775: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state UPsh switch stack-ports
Switch # Port 1 Port 2
-------- ------ ------
1 Ok Ok
2 Ok Ok
3 Ok Ok
ncrplan01#sh switch stack-ports
Switch # Port 1 Port 2
-------- ------ ------
1 Ok Ok
2 Ok Ok
3 Ok Ok
ncrplan01#
000053: Aug 21 17:26:22.865: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 3 has changed to state DOWN
000054: Aug 21 17:26:23.301: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state DOWN
000055: Aug 21 17:26:29.341: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state UP
000056: Aug 21 17:26:30.096: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 3 has changed to state UP
ncrplan01#
Anyhow, thanks for your help. I guess I will open a TAC Case.
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