Hi, I noticed that on my 2950 switches, sometimes I Configure trunk allowing certain vlans, but then I do show run and the 'switchport trunk allowe vlan x,y' info is not visible.
That should come up once ports are enabled on both sides of the trunk, right? Is that a bug or a by design feature on the IOS? Strange...
Current configuration : 122 bytes
!
interface FastEthernet0/23
description gw1
switchport mode trunk
no keepalive
shutdown
speed 100
duplex full
end
myswitch#config t
Enter configuration commands, one per line. End with CNTL/Z.
myswitch(config)#int f0/23
myswitch(config-if)#switchport trunk allow vlan add 7
myswitch(config-if)#switchport trunk allow vlan add 4
myswitch(config-if)#shut
myswitch(config-if)#
myswitch#wri mem
Building configuration...
[OK]
myswitch#show run int f0/23
Building configuration...
Current configuration : 122 bytes
!
interface FastEthernet0/23
description gw1
switchport mode trunk <=========== see that vlans are not visible.
no keepalive
shutdown
speed 100
duplex full
end
myswitch#show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/22, Fa0/23
4 VLAN0004 active
7 Ma1 active Fa0/1, Fa0/2, Fa0/3, Fa0/4
Fa0/5, Fa0/6, Fa0/7, Fa0/8
Fa0/9, Fa0/10, Fa0/11, Fa0/12
Fa0/13, Fa0/14, Fa0/15, Fa0/16
Fa0/17, Fa0/18, Fa0/19, Fa0/20
Fa0/21
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
4 enet 100004 1500 - - - - - 0 0
7 enet 100007 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
1003 tr 101003 1500 - - - - - 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
myswitch#5~
