05-28-2012 03:32 AM - edited 03-07-2019 06:56 AM
Need Help,
I am on to the process of stacking a new 3750V2 with the old C3750 24PS-S, As per the cisco guidance I have uploaded both the switches with the same IOS code 12.2(53) SE1, and the priority of the old switch as 15 and new one with 1(default).
When connected the stack cable from port 1 Old to port 2 New, both the switch attemtps to be a master. Please see the attached text file.
btm3750sw02#sh switch
Switch/Stack Mac Address : 0023.34ca.e100
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
*1 Master 0023.34ca.e100 15 0 Ready
2 Member 68bd.abd4.8b80 1 0 Progressing
Above is the status after the progress.
Can anyone help on this please.
Thanks
Ramkumar
05-28-2012 06:00 AM
Hi Ramkumar,
Progressing status indicates that the stack master is communicating with the new switch joining the stack, so it is a normal state. How did you determine that a switch 2 is trying to attempt to be a master and did it change Progressing status?
Kind Regards,
Ivan
**Please grade this post if you find it useful.
05-28-2012 09:38 PM
Yes you are right, the switches are communicating. But stacking doesn't work.
There is no change in the status,
btm3750sw02#sh switch
Switch/Stack Mac Address : 0023.34ca.e100
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
*1 Master 0023.34ca.e100 15 0 Ready
2 Member 68bd.abd4.8b80 1 0 Progressing
Please see the output below of switch 2(new 3750V2)
Waiting for Stack Master Election...
SM: Waiting for other switches in stack to boot...
################################################################################
#######################################
SM: All possible switches in stack are booted up
POST: Inline Power Controller Tests : Begin
POST: Inline Power Controller Tests : End, Status Passed
POST: PortASIC CAM Subsystem Tests : Begin
POST: PortASIC CAM Subsystem Tests : End, Status Passed
POST: No Cable found on stack port 1
POST: PortASIC Stack Port Loopback Tests : Begin
POST: Found Stack port 1 Down
POST: Found Stack port 2 Down
POST: Skipping Stack port External loopback
POST: PortASIC Stack Port Loopback Tests : End, Status Passed
POST: PortASIC Port Loopback Tests : Begin
POST: PortASIC Port Loopback Tests : End, Status Passed
Election Complete
Switch 2 booting as Master
Waiting for Port download...Complete
05-29-2012 01:19 AM
Hi Ramkumar,
Check the stack cables. It is often seen when there is a problem with stack cables connection or cable failure. And as we see below, the switch stack ports are all down, so they do nto communicate to decide the master and both try to become master:
btm3750sw02#sh switch stack-ports
Switch # Port 1 Port 2
-------- ------ ------
1 Down Down btm3750sw02#sh switch stack-ports
Switch # Port 1 Port 2
-------- ------ ------
1 Down Down
Kind Regards,
Ivan
**Please grade this post if you find it useful.
05-29-2012 05:02 AM
Hi Ivan,
Changing the cable didn't work.
The switch is stacked as soon as i reload the old switch( i have tried reloading the new one but no luck, tooks sometime to get the dowtime for reloading the old one since it is in production ) looks like some bug.
Working fine now. Thanks a lot for your response.
05-29-2012 05:06 AM
Welcome, Ramkumar. Glad it works fine now.
04-22-2014 02:35 AM
Hi Ivan,
I would like to ask if can be stack WS-C3750X-24T-S and WS-C3750G-24TS-S1U
And if can , what need to be on both switch to work in stack.
Thanks
Kind regards
04-22-2014 05:08 AM
You need to ensure both switches are running the same IOS and the same Feature Set (i. e. IP Base or IP Services, etc).
For 3750, I would recommend you use IOS version 121.2(55)SE9.
05-28-2012 09:46 PM
Additional Information,
btm3750sw02#sh switch stack-ports summary
Switch#/ Stack Neighbor Cable Link Link Sync # In
Port# Port Length OK Active OK Changes Loopback
Status To LinkOK
-------- ------ -------- -------- ---- ------ ---- --------- --------
1/1 Down None 50 cm Yes No Yes 8 No
1/2 Absent None No cable No No No 7 No
Weird, The stack ports shows down but i see it communicating. Activity between the switches,
btm3750sw02#sh switch stack-ring activity
Sw Frames sent to stack ring (approximate)
------------------------------------------------
1 895254246
Total frames sent to stack ring : 895254246
Note: these counts do not include frames sent to the ring
by certain output features, such as output SPAN and output
ACLs.
btm3750sw02#sh switch stack-ring activity
Sw Frames sent to stack ring (approximate)
------------------------------------------------
1 895257933
Total frames sent to stack ring : 895257933
Note: these counts do not include frames sent to the ring
by certain output features, such as output SPAN and output
ACLs.
btm3750sw02#sh switch stack-ring activity
Sw Frames sent to stack ring (approximate)
------------------------------------------------
1 895267147
Total frames sent to stack ring : 895267147
Note: these counts do not include frames sent to the ring
by certain output features, such as output SPAN and output
ACLs.
btm3750sw02#sh switch stack-ports
Switch # Port 1 Port 2
-------- ------ ------
1 Down Down btm3750sw02#sh switch stack-ports
Switch # Port 1 Port 2
-------- ------ ------
1 Down Down
05-28-2012 03:32 PM
When connected the stack cable from port 1 Old to port 2 New, both the switch attemtps to be a master.
No it's not. Switch 1 has a priority of 15 and switch 2 has a default priority of 1.
05-28-2012 09:40 PM
Hi Leo,
Even though the switch has lowest priority, itz attempting to boot as master. See the output in my reply to Ivan.
05-28-2012 10:49 PM
POST: Found Stack port 1 Down
POST: Found Stack port 2 Down
POST: Skipping Stack port External loopback
POST: PortASIC Stack Port Loopback Tests : End, Status Passed
POST: PortASIC Port Loopback Tests : Begin
POST: PortASIC Port Loopback Tests : End, Status Passed
Election Complete
Switch 2 booting as Master
And you are right. But do you know WHY Switch 2 bootup as a Master? Because Stack port 1 and 2 are DOWN. Which means it bootup as a stand-alone and wasn't a member of a stack.
05-29-2012 04:58 AM
Leo,
The switch is stacked as soon as i reload the old switch( i have tried reloading the new one but no luck, tooks sometime to get the dowtime for reloading the old one since it is in production ) looks like some bug.
Working fine now. Thanks a lot for your response.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide