Re: Juniper advertises ::/0 Cisco hears ::/3
[email protected]
gwood83 at gmail.com
Sat May 12 02:17:08 UTC 2012
Very interesting. Do you know what platform and code the Juniper side on L3 is running?
Sent from my HTC on the Now Network from Sprint!
----- Reply message -----
From: "Ben Bartsch" <uwcableguy at gmail.com>
Date: Fri, May 11, 2012 6:29 pm
Subject: Juniper advertises ::/0 Cisco hears ::/3
To: <nanog at nanog.org>
This one is very strange...
Has anyone seen this behavior with BGP IPv6 between Juniper (owned by Level
3, advertising routes correctly, sending default ::/0) and Cisco (6509
running 12.2.58.SXI6 advipservices, receiving all routes fine except
default, hearing ::/3)? I worked with Level 3 and they confirmed they are
sending ::/0 as default:
show route advertising-protocol bgp 2001:1900:2100::XXX
inet6.0: 11139 destinations, 43712 routes (11135 active, 0 holddown, 7
hidden)
Prefix Nexthop MED Lclpref AS path
* ::/0 Self I
We see a ::/3:
XXXXXXX#sh ip bgp ipv6 uni neigh 2001:1900:2100::XXX received-r
BGP table version is 497237119, local router ID is XXX.XX.XX.XXXX
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> ::/3 2001:1900:2100::XXX
0 3356 i
I opened a TAC case and they had me run some IPv6 BGP detailed debugging
which confirmed we are receiving a ::/3
*May* *11* *18:01:07* *XXXXXXXXXXX* *67205:* *May* *11* *18:01:05.701* *CDT:
* *BGP*(*1*)*:* *process* *::/3*, *next* *hop* *2001:1900:2100::XXX* (*
FE80::XXXX:XXXX:XXXX:XXXX*), *metric* *0* *from* *2001:1900:2100::XXX*
Cisco's next step is for us to Wireshark the interface. I have requested
Level 3 engage Juniper TAC, but am not expecting them to come up with
anything since they already confirmed they are sending ::/0.
We have a second connection to Level 3 that is Cisco - Cisco and it is
working fine. My gut says this is one of those Juniper - Cisco
communications issues, but I need proof.
I am just curious if anyone has seen this type of behavior. Have a great
weekend.
-Ben
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