07-19-2007 11:31 AM - edited 03-05-2019 05:23 PM
I am working on two 6509 and few 4848...I just added a VLAN to my VLAN database and would like to allow it on few trunks without them going down. Last time I did, the trunks went down.
Thanks
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07-19-2007 11:40 AM
All you have to do is to add the following command
switchport trunk allowed vlan add
The trunk should not go down due to this
Note that if you leave out the "add" modifier you will remove all the currently configured VLANs from the trunk. This will almost certainly take the switch off the net and prevent you from communicating with it.
HTH, rate if it does
Narayan
07-19-2007 11:37 AM
Adding a Vlan to a database shouldn't cause the trunks to go down unless you are doing manual pruning. Is that the case here ?
07-19-2007 11:40 AM
All you have to do is to add the following command
switchport trunk allowed vlan add
The trunk should not go down due to this
Note that if you leave out the "add" modifier you will remove all the currently configured VLANs from the trunk. This will almost certainly take the switch off the net and prevent you from communicating with it.
HTH, rate if it does
Narayan
07-19-2007 11:43 AM
I should of mentioned that the trunks are part of etherchannel. Would that make a difference? I have for intstance 8 interfaces that are member of an etherchannel.
07-19-2007 11:47 AM
I dont think that etherchannel should make a difference and trunk should not go down
Narayan
07-19-2007 11:48 AM
No difference whatsoever, just use the range command so all ports take the changes at the same time.
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