Dear all,

 

I have configured a simple BGP checker alert based on the provided example in observium’s website :

 

 

This works just fine for IPv4, but something is clearly wrong with IPv6 as some IPv6 BGP sessions show up in error.

 

This is an example from two Brocade CER-RT routers acting BGP route reflectors for a bunch of PEs. They are showing the exact same error :

 

 

IPv6 addresses DEAD:BEEF:CAFE::5 and DEAD:BEEF:CAFE::6 are loopbacks used to used by former PEs.

 

If I look at the BGP sessions state on the routers themselves, you can that I have willingly administratively shutdown the sessions :

 

telnet@rr01-par01#sh ipv bgp summary 

  Neighbor Address          AS#         State   Time          Rt:Accepted Filtered Sent     ToSend

  DEAD:BEEF:CAFE::2              XYZ       ESTAB   366d 8h29m    2           0        32985    0        

  DEAD:BEEF:CAFE::3              XYZ       ESTAB   366d 8h18m    24074       0        8911     0        

  DEAD:BEEF:CAFE::4              XYZ       ESTAB   366d 8h16m    1790        0        32360    0        

  DEAD:BEEF:CAFE::5              XYZ       ADMDN   366d12h37m    0           0        0        0        

  DEAD:BEEF:CAFE::6              XYZ       ADMDN   366d12h37m    0           0        0        0        

  DEAD:BEEF:CAFE::7              XYZ       CONN    357d12h10m    0           0        0        32985    

  DEAD:BEEF:CAFE::8              XYZ       ESTAB   366d12h37m    32453       0        24701    0        

 

Rest of alert checks for IPv4 and IPv6 sessions are fine.

 

Any hints about this ? Any traces I could provide ?

 

Best regards.