02-21-2007 06:28 AM - edited 03-05-2019 02:29 PM
I have tried to block Vlan 1 on a port fa 0/1 trunk of a Catalyst 2924-XL.
I have entered :
switch#(config-if)switchport mode trunk
switch#(config-if)switchport native vlan 2
switch#(config-if)switchport trunk allowed vlan 2
Unfortunately I see again vlan 1 on this trunk
Can I block it on Catalyst 2924-XL ?
bets regards
Lorenzo
02-21-2007 07:34 AM
I do not think you can eliminate/disable vlan 1 it carries carries the spanning tree traffic and other special purpose trunk info.
If you don't explicilty assign it ip addressing info you should be ok. All native vlan 2 does is transfer vlan 2 frames untagged.
02-21-2007 11:28 PM
Hi,
I know, but with C2950-24 I can do it,
I can block vlan 1 on trunk to any port
fastethernet, provided that I configure another native vlan for that port.
Can you tell me about it ?
Best regards
Lorenzo
02-22-2007 06:31 AM
Lorenzo, the 2900XL and 3500XL series boxes are slightly different creatures. Example:
Switch>(config)switchport trunk allowed vlan remove vlan-list
The " remove vlan-list" valid variable range is 2-1001, also the pruneeligible list accepts only 2-1001.
I don't have access to a 2900XL, but you might want to see if there's a later IOS release that addresses this.
Have you tried to Shutdown interface VLAN1 and see if it takes?
My ref:
02-22-2007 06:51 AM
yes ,
it he same also if I shutdown Vlan 1.
Perhaps 2950 and 2900 are really difference.
I have installed the last IOS for my 2924-XL
but don't change never.
best regards
Lorenzo
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