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philip moore
Beginner

back to back connection on single device (global to vrf)

Dear All,

I am trying to get a topology working using GNS3 Alpha 6 IOU L2 device, but actually the same issue applies to GNS3 using 3660 16ESW. I have not tried on real device, so maybe that is my issue :( In the real world it will be a 6500 Sup720

I have a single device, and would like to make a connection between the global route table and a vrf.

So I would have 1 interface on global, and one interface on vrf.

In GNS, I create a topology like this:

router e1/0 - switch port #1
router e1/1 - switch port #2

This creates a cable from one interface to another


Then the configuration is posted below.

Ping doesn't work, I don't even see a CDP neighbor.

I wonder if GNS supports the back2back connection (router connection to itself).

Any ideas? (theoretically it should work)

I have also tried make the interfaces e1/0 & e1/1 as the routed port, same issue. (Note that this is the only way to test it using GNS3 standard as 3660 does not support mac-address set on vlan interfaces)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! CONFIG on IOU
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

ip vrf UNSEC-BDR
rd 10.131.148.21:65002
!
interface Ethernet1/0
description border router to LAN (outside)
switchport access vlan 363
!
interface Ethernet1/1
description LAN to border router (inside)
switchport access vlan 364
!
interface Vlan363
description BDR to LAN (outside) - mac hsrp only possible on IOU
ip vrf forwarding UNSEC-BDR
ip address 10.8.16.21 255.255.255.240
mac-address 0000.0363.0001
!
interface Vlan364
ip address 10.8.16.18 255.255.255.240



!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! CONFIG on GNS
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!



ip vrf UNSEC-BDR
rd 10.131.148.21:65002
!
interface Ethernet1/0
description border router to LAN (outside)
no switchport
ip vrf forwarding UNSEC-BDR
ip address 10.8.16.21 255.255.255.240
!
interface Ethernet1/1
description LAN to border router (inside)
no switchport
ip address 10.8.16.18 255.255.255.240
!

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