10-30-2014 01:28 PM - edited 03-05-2019 12:04 AM
Hello,
I have following problem. I want to tag a route on a CE router and advertise it into the MPLS.
router A (CE-A): subnet 10.12.10.0/24
CE-A ------ PE-A ------- MPLS --------PE-B-------CE-B------
I want to tag the routes on router CE-A with tag500 and want to receive the tag on router CE-B with that tag in order to redistribute them based on the Tag 500.
I have tried following:
route-map Tag500 permit 10
set tag 500
network 10.12.10.0 mask 255.255.255.0 route-map Tag500
and
neighbor 10.192.96.9 route-map Tag500 out
on the second command i am receiving:
% "Tag500" used as BGP outbound route-map, set tag not supported
on the router CE-B i am receiving only Tag XXXX (replaced real EBGP neighbor AS with XXXX). YYYY is own AS.
CE-B#show ip route 10.12.10.254
Routing entry for 10.12.10.0/24
Known via "bgp YYYY", distance 20, metric 0
Tag XXXX, type external
Last update from 10.192.96.61 04:34:47 ago
Routing Descriptor Blocks:
* 10.192.96.61, from 10.192.96.61, 04:34:47 ago
Route metric is 0, traffic share count is 1
AS Hops 4
Route tag XXXX
I would like to see something like:
CE-B#show ip route 10.12.10.254
Routing entry for 10.12.10.0/24
Known via "bgp YYYY", distance 20, metric 0
Tag 500, type external
Last update from 10.192.96.61 04:34:47 ago
Routing Descriptor Blocks:
* 10.192.96.61, from 10.192.96.61, 04:34:47 ago
Route metric is 0, traffic share count is 1
AS Hops 4
Route tag 500
How can i make this happen ?
Can i do this with communities ? If yes, could someone please explain how ?
Kind Regards,
Oliver
10-30-2014 07:34 PM
Do you have control of the other side? If not, you'll have to work with the isp to make sure they treat your community the way that you want. You'll also need to make sure they support them. Other than that, you can set communities outbound in the route map, and you'll need to configure your neighbor to send the communities:
route-map Community permit 20
set community 123:1234 (usually ASN:Number)
router bgp 1
neighbor 1.1.1.1 send-community both
neighbor 1.1.1.1 route-map Community out
When they receive it, they'll need to match on the community instead of the tag...
HTH,
John
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