[j-nsp] VPLS Multihoming and CCC-Down interface flag

[Misak Khachatryan]

Hello,

I recently faced to a strange problem, which i can't understand. Suppose 
this network diagram:


MPLS Cloud --- PE (MX80) ---- CE (EX4200) ---- PE (MX80) ---- MPLS Cloud.

As You can see, EX4200 has two uplinks to two MX80, which are part of 
MPLS network infrastructure. VPLS Multihoming is configured:


PE1 (gavar)

misak at mx-gavar> show configuration routing-instances Miom_ISP-Inet | 
display inheritance | except ##

instance-type vpls;
vlan-id 342;
interface ge-1/1/9.342;
routing-interface irb.342;
route-distinguisher 10.255.255.33:342;
vrf-target target:65500:342;
protocols {
     vpls {
         site-range 100;
         no-tunnel-services;
         site martuni {
             site-identifier 32;
             multi-homing;
             site-preference primary;
             interface ge-1/1/9.342;
         }
         site gavar {
             site-identifier 33;
         }
         mac-flush;
         connectivity-type irb;
     } 
 
 

} 
 
 

 
 
 


PE2 (getap)

instance-type vpls;
vlan-id 342;
interface ge-1/1/9.342;
route-distinguisher 10.255.255.10:342;
vrf-target target:65500:342;
protocols {
     vpls {
         site-range 100;
         no-tunnel-services;
         site martuni {
             site-identifier 32;
             multi-homing;
             site-preference backup;
             interface ge-1/1/9.342;
         }
         site getap {
             site-identifier 10;
         }
         mac-flush;
     }
}


CE site is called martuni, and EX4200 on that site is configured with 
vlan-id all on both uplinks.


Now the problem - when one uplinks on EX4200 go down, or for example one 
router (getap) goes down, I shouldn't have any problem with this routing 
instance, but in this case interface ge-1/1/9.342 goes to CCC-Down state 
and stops passing traffic.

There are lot of other VPLS configured on router and that links, and i 
noticed that only VPLS-es that exist only on these two PEs show this 
behavior. If You have VPLS configured on other PE router throughout MPLS 
cloud, links stays up and work as expected.

I tried lot of knobs and options, but no luck. Can anyone explain this 
behavior? Any help highly appreciated.

-- 
Best regards,
Misak Khachatryan,