Unable to priorize an external route into IS-IS redistribution

[Jave]

Hi everybody,

I'm facing a problem setting up a lab. This is my goal:

* I have a lab with 3 VOSS devices forming a SPB Fabric
* 2 of them have each one a BGP IPv4 peering learning the external default route; they redistribute this route into IS-IS in a specific VRF

* Third VOSS simulate a client access switch. Interconnection with third party client's device is done via a local VLAN into a dedicated public subnet.

* the setup use a L3VSN into the VRF between this client VLAN and the 2 VLANs dedicated to BGP peering.

All is working fine, access switch retrieve default external route to either VOSS BGP peer BUT I can't priorize systematicaly one preferred default route.

How can I achieve that ?

[EF · Accepted solution]

Hi Jave,

maybe using route-map 

How To: VOSS - How to redistribute only listed static routes into ISIS by using route-map? | Extreme...

And with the command "set ip-preference X"  you can change the preferences from one node.

Regards

[Jave]

Hi @EF 

Yes, I haven't posted the solution I've found, but this is it (creating a VRF VIDEO accepting only default route; I set ip preference 50 for isis in order to priorize the same route learnt via BGP of which default ip preference is 45):

router vrf VIDEO
ip prefix-list "DEFAULT" 0.0.0.0/0
route-map "ISIS-DEFAULT-PREF" 1
permit
enable
match network "DEFAULT"
match protocol isis
set ip-preference 50
exit
isis accept route-map "ISIS-DEFAULT-PREF"
exit

 isis apply accept vrf VIDEO

Regards.