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Sub-Interface under port-channel connected to L2 switch

khanah
Level 1
Level 1

Dear friends,

We have layer-2 6500-CATOS switches which are connected to one layer-3 6500-IOS switch via

port-channel consist of 4x1G interfaces from each switch, and each switch contains three

vlans. We want to have same vlan number across all layer-2 switches without VTP and want to create

sub-interfaces on layer-3 switch under the respective port-channel interface (same like router on a stick), but were unable to do it.

Now need your help to create sub-interfaces. Always getting this error 'Command rejected: VLAN 308 not available' but vlan exist. see below confiugration of my layer-3 switch.

EOB2EUDS#config t

Enter configuration commands, one per line.  End with CNTL/Z.

EOB2EUDS(config)#int po1.308

EOB2EUDS(config-subif)#en

EOB2EUDS(config-subif)#encapsulation do

EOB2EUDS(config-subif)#encapsulation dot1Q 308

Command rejected: VLAN 308 not available

EOB2EUDS(config-subif)#

EOB2EUDS(config-subif)#encapsulation dot1Q 308

Command rejected: VLAN 308 not available

EOB2EUDS(config-subif)#do show vtp status

VTP Version                     : 2

Configuration Revision          : 0

Maximum VLANs supported locally : 1005

Number of existing VLANs        : 24

VTP Operating Mode              : Transparent

VTP Domain Name                 : EOB

VTP Pruning Mode                : Disabled

VTP V2 Mode                     : Disabled

VTP Traps Generation            : Disabled

MD5 digest                      : 0x08 0x31 0xEB 0x95 0xC2 0xC5 0xA9 0x54

Configuration last modified by 10.2.101.254 at 2-5-13 08:38:01

EOB2EUDS(config-subif)#

                  

EOB2EUDS(config-subif)#do show vlan

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active
9    ENTRY                            active
208  3W-Linux                         active
308  3W-WIN                           active

3 Replies 3

Hi,

Can you give output of show etherchannel

Regards,
Smitesh

Its been resolved by deleting layer-2 vlan database  from the switch then i managed to create sub-interfaces means point-to-point  same as juniper router, this solution will eliminate spanning the same vlans(VTP) across switch network  as well layer-2 loop problem.

We got this idea from juniper router. thanks.

khanah
Level 1
Level 1

closing thanks all for your support as i have managed to resolved the problem.

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