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Webcast-Catalyst9k
New Member

'switchport trunk allowed vlan except'

Hi All.

I'm just worried that above subjet command will be used in first time in our switching environment.

Basically, all of vlans are allowing in x-over trunk interface. Btw, we don't want to allow specific vlan a, vlan b.

the work procedure will be happening on primary device as following

primary)

inteface port-channel x/x

switchport trunk allwoed vlan except vlan a, b

secondary)

interface port-channel x/x                  

switchport mode trunk

  -- allowed vlan

once primary device is done, and then we will move to secondary device to modify.

primary)

inteface port-channel x/x

switchport trunk allwoed vlan except vlan a, b

secondary)

interface port-channel x/x                  

switchport trunk allwoed vlan except vlan a, b

STP is defined basically. so, above work procedure will be safe? it's our core device so I guess it will be ok. but, I would like to get knowhow to avoid unexpected situation during change window.

Thanks.

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