08-22-2010 09:39 AM - edited 03-06-2019 12:35 PM
Hi,
i have genearl question to ask here.
On cisco 6500 switches when we replaced line cards we know that they are hot swappable.
that means when we install the modules they are plug and play.
my question is how do the new line cards get the config back from supervisior?
,many thanks
mahesh
Solved! Go to Solution.
08-22-2010 12:17 PM
Mahesh
It depends on whether the module you have inserted is the same as the one you have replaced. If it's a different module then it won't have any config to restore from NVRAM.
Jon
08-22-2010 06:00 PM
Hi Mahesh,
The hardware replacement has to be the same. For example: if you have a 10/100/1000 copper card and it has gone bad, replace it with same exact line card not with a 10/100 card, because not all features are supported in all modules. As long as you do an exact replacement in the same exact slot number, you should be fine and should see the config restored.
HTH
Reza
08-22-2010 09:52 AM
Hi Mahesh,
The config is on the NVRAM, so when you replace a module the config is still applies to that module as long as you put the new module in the same slot as the old one.
HTH
Reza
08-22-2010 10:01 AM
Hi,
thanks for reply
so you are talking about config in supe?
also do line cards have memory to store their config?
mahesh
08-22-2010 10:10 AM
Hi,
No, the config is on the NVRAM. The line cards have memory/buffer but do not hold configs. Config is on the SUP module.
HTH
Reza
08-22-2010 10:44 AM
Thanks for the reply
but sometimes i have seen that when we insert the new line card and do the sh run it does not show config for that module?
do u know why this happens
08-22-2010 12:17 PM
Mahesh
It depends on whether the module you have inserted is the same as the one you have replaced. If it's a different module then it won't have any config to restore from NVRAM.
Jon
08-22-2010 04:35 PM
Hi jon,
Thanks for the reply when you say it has to be same you mean to say that hw and software version?
mahesh
08-22-2010 06:00 PM
Hi Mahesh,
The hardware replacement has to be the same. For example: if you have a 10/100/1000 copper card and it has gone bad, replace it with same exact line card not with a 10/100 card, because not all features are supported in all modules. As long as you do an exact replacement in the same exact slot number, you should be fine and should see the config restored.
HTH
Reza
08-24-2010 11:20 AM
Hi Joan and Reza
Many thanks for your replies
mahesh
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