On a 1841 - Backup interface for vlan inerface - tunnel interface

Unanswered Question
Sep 10th, 2010
User Badges:

Hi:

On a Cisco 1841 router I  have an Interface vlan configured. Also I have  f0/0/1 interface  defined as switchport access with the same vlan. Is it possible to now define a tunnel interface and have it include the following  - backup interface vlan xx ?


Interface vlan 55

     ip addresss 10.0.0.1 /24


interface f0/0/1

     ip address  10.0.1.100 /24

     switchport access vlan 55


interface tunnel5

     backup interface vlan55

     ip address 10.0.2.33/24


Is this configuration valid on a 1841 with these interfaces ? Can the "backup interface " be used in this situation ?


Thanks for any help.

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.
David Salazar Fri, 09/10/2010 - 10:33
User Badges:

Hi, mikir



I see a mistake in the configuration.



a) interface f0/0/1 (A interface can not be layer 3 (ip add 10.0.1.100/24) and the same time be a Layer2 (Switchport access vlan 55))


     ip address  10.0.1.100 /24


     switchport access vlan 55



**** To have a Interface fastethernet as layer2 interface you need issue the command "no switchport".



In other order of idea, you can use a Interface VLAN (SVI) as Backup interface, but if you have more than one port in the Vlan 55 any physical port member of the vlan can be use.



I hope help you

mikik Fri, 09/10/2010 - 13:58
User Badges:

Hi David:


Thanks for the answer. You are correct , the interface f0/0/1 is switchport access and no ip address. I simply did not write it correctly in the question.

I  did not see in Cisco  examples the use of 'backup interface" in this kind of situations. Mostly just for dialer interface. So i understand that this should work. There is in fact  only one interface in the vlan.


Mickey

Actions

This Discussion