Cisco switch issue
I have a stack of cisco 3750 switches connected using the stack-wise cables. Hence switch 1 is connected to 2, 2 to 3, 3 to 4 etc. switch 6 is connected back to 1.
So there is a path to all switches if any switch fails.
here is a show stack output :
1 Member bc16.650e.3a80 1 3 Ready
2 Member e4d3.f11e.0300 2 3 Ready
3 Member 6073.5c30.eb00 5 3 Ready
*4 Master 0006.f6bb.8500 15 3 Ready
5 Member 6073.5c32.1300 4 3 Ready
6 Member 4c4e.353a.bb00 3 3 Ready
When I removed the power from switch 1 switches 1 2 and 3 went down 4,5, and 6 stayed up. the sh switch said they were 'removed'.
1 Member bc16.650e.3a80 1 3 removed
2 Member e4d3.f11e.0300 2 3 removed
3 Member 6073.5c30.eb00 5 3 removed
*4 Master 0006.f6bb.8500 15 3 Ready
5 Member 6073.5c32.1300 4 3 Ready
6 Member 4c4e.353a.bb00 3 3 Ready
They came back when I powered on switch 1. I a, confused about this. I have read the cisco stuff on it but I can not get a definative answer regarding if this is normal or not.
So there is a path to all switches if any switch fails.
here is a show stack output :
1 Member bc16.650e.3a80 1 3 Ready
2 Member e4d3.f11e.0300 2 3 Ready
3 Member 6073.5c30.eb00 5 3 Ready
*4 Master 0006.f6bb.8500 15 3 Ready
5 Member 6073.5c32.1300 4 3 Ready
6 Member 4c4e.353a.bb00 3 3 Ready
When I removed the power from switch 1 switches 1 2 and 3 went down 4,5, and 6 stayed up. the sh switch said they were 'removed'.
1 Member bc16.650e.3a80 1 3 removed
2 Member e4d3.f11e.0300 2 3 removed
3 Member 6073.5c30.eb00 5 3 removed
*4 Master 0006.f6bb.8500 15 3 Ready
5 Member 6073.5c32.1300 4 3 Ready
6 Member 4c4e.353a.bb00 3 3 Ready
They came back when I powered on switch 1. I a, confused about this. I have read the cisco stuff on it but I can not get a definative answer regarding if this is normal or not.
No, this is not normal. The other switches should stay in the stack.
I would check the stack cables between 3 and 4. Those stack cables for the 3750s are something awful, and I have had to reseat some in the past. It's possible that when you unplugged 1, that was providing the path to to 2 and 3 as far as the rest of the stack is concerned.
Check the logs on switch 3 and switch 4 to see if there are any entries regarding the stack at that point. Other than what I have mentioned, there could be something more seriously wrong.
Check the logs on switch 3 and switch 4 to see if there are any entries regarding the stack at that point. Other than what I have mentioned, there could be something more seriously wrong.
Are these 3750X switches using StackPower?
ASKER
no they are no using stack power. each switch is supplied with 2 power supplies.
ASKER CERTIFIED SOLUTION
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ASKER
here it is but i can see the issue
hstack1#sh switch ne
Switch # Port 1 Port 2
-------- ------ ------
1 2 6
2 3 1
3 None 2
4 5 None
5 6 4
6 1 5
1 Ok Ok
2 Ok Ok
3 Down Ok
4 Ok Down
5 Ok Ok
6 Ok Ok
hstack1#sh switch ne
Switch # Port 1 Port 2
-------- ------ ------
1 2 6
2 3 1
3 None 2
4 5 None
5 6 4
6 1 5
1 Ok Ok
2 Ok Ok
3 Down Ok
4 Ok Down
5 Ok Ok
6 Ok Ok
As I stated, looks to be an issue with your stack cable between member switches 3 and 4. Try swapping or reseating the cable.
So there's your answer...
Switch 3 doesn't link to switch 4. Therefore you have a break in your stack. The only way to get to switch 3 from the master is via switch 1.
If you connect a stack cable between switch 3 and switch 4 you can remove the power from switch 1 and switches 2 and 3 will stay up in the stack.
Switch 3 doesn't link to switch 4. Therefore you have a break in your stack. The only way to get to switch 3 from the master is via switch 1.
If you connect a stack cable between switch 3 and switch 4 you can remove the power from switch 1 and switches 2 and 3 will stay up in the stack.
ASKER
OK