[c-nsp] VRF & Hairpin Routing?

[Sean Watkins]

This doesn't work:

I get this

Router(config-subif)#encapsulation dot1Q 10

%Configuration of multiple subinterfaces of the same main
interface with the same VID (10) is not permitted.
This VID is already configured on FastEthernet0/1.10.

Router(config-subif)#

Sean

 

> -----Original Message-----
> From: Joe Maimon [mailto:jmaimon at ttec.com] 
> Sent: Thursday, April 06, 2006 6:00 PM
> To: Sean Watkins
> Cc: 'cisco-nsp at puck.nether.net'
> Subject: Re: [c-nsp] VRF & Hairpin Routing?
> 
> 
> 
> Sean Watkins wrote:
> 
> > Hi,
> > Vlans 10 & 11 are connected together in an upstream switch  via a 
> > crossover cable.
> > 
> 
> Why dont you just dedicate a vlan for each inter-vrf  
> connection like so:
> 
> int fa0/0.10
> encap do 10
> ip addr 10.10.10.1 255.255.255.0
> int fa0/1.10
> encap do 10
> ip vrf fo X
> ip addr 10.10.10.2 255.255.255.0
> 
> Dont need anything "fancy" in the switch.
> 
> You can actually build this with tunnels and loopbacks. You 
> can also use a crossover cable between two fastethernets on 
> the router without a switch.
> 
> Joe
>