Cisco 3750 Stack Preemption

[orielrose2011]

Hi All

I have a stack of 5 switches and have configured switch 1 as master however i want to setup some preemption feature for it incase if sw1 reloads it should become master again.

i have read on cisco site that there is a way to do it however conud not find it..

thanks

Oriel

[Amit Aneja]

Oriel,

I don't think this is possible. If I look at the priority values for master election, it is from 1 to 15.

Even if you assign 1 to a switch, this switch can become master if there are no competing members in the stack. There is no Preemption in Master election as well. So, this is not possible.

Regards,

Amit

[andtoth]

Hi Oriel,

Once there's an active switch elected in the stack, there's no preemption. You can configure each member with a priority value from 1 to 15.

Please review the following documentations for more details, examples and frequently asked questions.

Creation and Management of Catalyst 3750 Switch Stacks

http://www.cisco.com/en/US/products/hw/switches/ps5023/products_configuration_example09186a00807811ad.shtml

Managing Switch Stacks

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_55_se/configuration/guide/swstack.html

Best regards,

Andras

[orielrose2011]

Yes this is what i understand however i have seen it somewhere in cisco documentation that preemption is possible.

Let me find out that doucment and i will get back to you guys.

thanks for your help.

Oriel X

[orielrose2011]

And can you guys please tell me how i can ask a new quesiton.

I am trying to start a private discussion and its asking me to select the people which i dont want.

i want to ask everybody just like i asked this question.

[andtoth]

After selecting the topic where you want to post, you'll need to click "Start a discussion" in the Actions pane on the right hand side.

Andras

[ankugarg]

I am sure there is no preemtion possible...Only way to do is the reload the newly elected master,after the old master comes up..This will retrigger the election,and old master will win