01-20-2010 06:33 PM - edited 03-04-2019 07:15 AM
Hi Everyone
Is there a problem incase we stack different models of cisco catalyst switches as we have stacked two models with details as follows
Two different models of switches in the stack are
Also of late at times we are unable to access the stack via telnet / snmp and remedy and remedy we have been following is taking hard reboot of the switches ( but it is not always the best way keeping into consideration that server farm is live on one of the designated vlans.
Is it something to do with
IP input process and virtual EXEC process
these processes are utilizing more CPU for 5 sec, reason behind this is VTY(telnet) connections.
PID CPU Time Process
191 10.69% IP Input
208 59.03% Virtual Exec
Kindly help
Regards
Sohail Sarwar
01-20-2010 07:12 PM
As long as the entire stack has the same IOS version and feature set.
If your stack is experiencing high CPU utilization, what is the version they are running on?
01-20-2010 07:13 PM
Hello Sohail,
With 3750 switches, you can mix and match any model you want and stack them together. Another word, you can have a stack of 3750s that has regular 3750, 3750G and 3750E.
As for your second question, can you provide "sh ver"?
Also do you see any crash files in your flash?
Can you provide "sh process cpu sor"
If you have configured every thing correctly, it may be a bug in the IOS that causes high CPU.
HTH
Reza
01-20-2010 10:21 PM
01-20-2010 10:54 PM
Hi
From the logs I did not find any clues it is fine
Can you check the process following commnd
show process cpu | ex 0.00 ( pl check several period of time provide output )
show process cpu history
and where this switch has been deployed it is handling huge traffic ( core / metro )
regards
krishna kumar
01-21-2010 12:06 AM
Hi Krishna kumar
Kindly find attached the output of commands as an attachment
sh processes cpu | excluding 0.00% ( command executed a no of times)
and show processes cpu history
We have utilised the Swictch at Core Level ( in Data Centre) where is we have replication link between DC and DR terminated on one of the Vlans
Also all access locations having Broadband Vsat Link are terminated on the same stack using GRE Tunnels
Regards
Sohail Sarwar
01-21-2010 04:06 AM
Hi
I went through the logs now the switch is working fine , pl clarify my questions
1, How frequent you are facing this issue
2. May be you will get slow responce when cpu utilization is high
3. you can monitor the same next couple of hours ( my observation during the short time the CPU intrupt more times / if the percentage is high
the device perfomance also will degrade
regards
krishna kumar
01-21-2010 08:42 AM
Hi Krishna
The answer to queries raised by you are as follows
1, How frequent you are facing this issue
answer) we have faced this issue thrice since last 6 to 8 months and remedial action taken by reboot of stack
2. May be you will get slow responce when cpu utilization is high
answer) OK Fair enough but what are the processes that choke CPU utilisation
and what is the resolution /way forward to solve this issue
do we need hardware upgradation to 6500 series or IOS upgrade from current version which although we upgraded few months back only
regards
Sohail Sarwar
01-22-2010 03:05 AM
Hi
Try to upgrade the latest IOS version SE53 and monitor the switch still you are facing same issue
Upgrade the hardware to 6500 with sup 720
regards
krishna kumar
01-22-2010 03:07 AM
Hi
If you have the hardware 6500 replace it other wise you can go with 4500- E with sup 6E
regards
krishna
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