Routing

Hello Experts,

I am runnig into a trouble configuring BGP autodiscovery VPLS between Cisco ASR1k and Juniper MX. We are mostly Juniper shop but planning to add Cisco boxes as PE devices. I am unable to setup VPLS between MX and ASR1k. The TLDP VPLS works OK but BGP autodiscovery does not work. I am quite surprised that nobody recently here opened the discussion about interoperabilty of this two boxes or maybe I missing something. Currently my config of Juniper box looks as follows:

show configuration routing-instances VPLS_Test
instance-type vpls;
interface xe-4/2/3.1893;
vrf-target target:1234:777;
protocols {
vpls {
mac-table-size {
2048;
}
no-tunnel-services;
site S1 {
site-identifier 1;
interface xe-4/2/3.1893;
}
}
}

show configuration protocols bgp group Edge
family l2vpn {
signaling;

Cisco:

l2 vfi Test_Cisco autodiscovery
vpn id 100
bridge-domain 100
rd 1.1.1.1:1
route-target export 1234:777
route-target import 1234:777

With the above configuration VPLS works across MX boxes but not with ASR1k. Back in 2010 according to this post http://forums.juniper.net/t5/Routing/Cisco-and-Juniper-VPLS-Integration-using-BGP/m-p/42308/highlight/true#M2682 autodiscovery between Cisco and Juniper was not supported but this is quite an old post and I am sure things changed since. Can someone advice on this please.

Many Thanks

hi !

if this what you have posted is all your cisco vpls config then it is clear that it does not work that way

for further info look into cisco documentation or lokk on cisco live for the BRKMPL-2101 presentation ( pic is taken from there)

regards

alexander

Hi,

you need to configure the l2vpn-id within the VPLS routing instance on the Juniper router matching the one on the Cisco router.

set routing-instances VPLS_Test l2vpn-id l2vpn-id:<AS>:>VPN-ID>

I addition, better to configure the auto-discovery-only knob:

set protocols bgp group Edge family l2vpn auto-discovery-only

Cheers,

Carsten

Hi Alexander,

Thanks for the link. I did not put here all my Cisco configuration which relates to VPLS thinking that i will need to correct something on Juniper box. Following Cisco Live presentation I was able to setup BGP signaling/autodiscovery VPLS between MX and ASR1K. I am sure folks out there will be interested and I will put full Cisco config here. I hope Juniper will not be against it.

l2vpn vfi context Cisco_Test
vpn id 1893
autodiscovery bgp signaling bgp
ve id 2
route-target export 1234:777
route-target import 1234:777

bridge-domain 1893
member Port-channel1 service-instance 1893
member vfi Cisco_Test

interface Port-channel1
mtu 1600
no ip address
no negotiation auto
service instance 1893 ethernet
encapsulation dot1q 1893

address-family l2vpn vpls
neighbor x.x.x.x activate
neighbor x.x.x.x send-community extended
neighbor x.x.x.x prefix-length-size 2
neighbor x.x.x.x suppress-signaling-protocol ldp
neighbor x.x.x.x activate
neighbor x.x.x.x  send-community extended
neighbor x.x.x.x prefix-length-size 2
neighbor x.x.x.x suppress-signaling-protocol ldp
exit-address-family

Many Thanks