[j-nsp] Juniper and Cisco - BGP MPLS L2VPN VPLS interoperability

Aaron aaron1 at gvtc.com
Wed Dec 2 12:45:34 EST 2015 

(reformatting email with carriage returns between debug lines, hopefully
that helps readability)

Is it normal for a Route Reflector to reflect routes back to the client that
send them in the first place ?  I'm still trying to figure out why this
ME3600 is resetting it's bgp session so I enabled some debugs and am
wondering if something weird is happening here with this ME3600 and this
version of IOS...

Like I said before, I bring up BGP L2VPN Address Family on a Juniper ACX5048
or MX104 and then terrible things happen to my ME3600's that run 15.2.(4)S3
and S5 ... BUT, not S1.  15.2(4)S1 is fine.  Also ASR920 with IOS XE
03.15.00.S is fine.

This ME3600 is 10.101.12.251 and does have a bgp-based l2vpn with the
following info...

interface Loopback0
 ip address 10.101.12.251 255.255.255.255

eng-lab-3600-1#sh bgp l2vpn vpls al
...
     Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 64512:10920
 *>  64512:10920:10.101.12.251/96
                       0.0.0.0                            32768 ?

eng-lab-3600-1#sh run | sec l2 vfi
l2 vfi v920 autodiscovery
 vpn id 10920
 shutdown

eng-lab-3600-1#sh vfi
...
VFI name: v920, state: admindown, type: multipoint, signaling: LDP
  VPN ID: 10920, VPLS-ID: 64512:10920
  RD: 64512:10920, RT: 64512:10920
  Bridge-Domain 920 attachment circuits:
    Vlan920
  Neighbors connected via pseudowires:
  Peer Address     VC ID        Discovered Router ID    S

********* ....so now that you know that this ME3600 is generating
64512:10920:10.101.12.251/96 NLRI, now see bgp debugs on this ME below....


Dec  2 17:18:57.848: %BGP-5-ADJCHANGE: neighbor 10.101.0.254 Up

Dec  2 17:18:57.848: BGP: ses global 10.101.0.254 (0x1132A048:1) read
request no-op

Dec  2 17:18:57.848: BGP(9): (base) 10.101.0.254 send UPDATE (format)
64512:10920:10.101.12.251/96, next 10.101.12.251, metric 0, path Local,
extended community RT:64512:10920 L2VPN AGI:64512:10920

Dec  2 17:18:57.852: BGP(4): (base) 10.101.0.254 send UPDATE (format)
10.101.12.251:1:96.8.176.80/28, next 10.101.12.251, label 393, metric 0,
path Local, extended community RT:1:1

Dec  2 17:18:57.852: BGP(4): (base) 10.101.0.254 send UPDATE (format)
10.101.12.251:6:2.2.2.0/24, next 10.101.12.251, label 411, metric 0, path
Local, extended community RT:6:6

Dec  2 17:19:02.848: BGP(9): 10.101.0.254 rcv UPDATE w/ attr: nexthop
10.101.12.251, origin ?, localpref 100, metric 0, originator 10.101.12.251,
clusterlist 10.101.0.254, merged path , AS_PATH , community , extended
community RT:64512:10920 L2VPN AGI:64512:10920, SSA attribute

Dec  2 17:19:02.848: BGPSSA ssacount is 0

**********************************************
*** SEE HERE PLEASE, it seems that right when I rcv a UPDATE from the RR
(10.101.0.254), in that same time stamp Dec  2 17:19:02.848 I see BGP
Closing.  Is this coincidental ? or is this ME3600 running this version of
software not able to deal with this ? and also, what in the world does the
juniper got to do with this , such that when I enable bgp l2vpn on the
juniper, this phenomena begins !
**********************************************

Dec  2 17:19:02.848: BGP(9): 10.101.0.254 rcv UPDATE about
64512:10920:10.101.12.251/96 -- DENIED due to: ORIGINATOR is us; MP_REACH
NEXTHOP is our own address;

Dec  2 17:19:02.848: BGP: 10.101.0.254 went from Established to Closing

Dec  2 17:19:02.852: %BGP-3-NOTIFICATION: sent to neighbor 10.101.0.254 3/10
(illegal network) 1 bytes 00

Dec  2 17:19:02.852: BGP: ses global 10.101.0.254 (0x1132A048:1) Send
NOTIFICATION 3/10 (illegal network) 1 bytes 00

Dec  2 17:19:02.852: %BGP-4-MSGDUMP: unsupported or mal-formatted message
received from 10.101.0.254:
FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 006A 0200 0000 5390 0E00 2000 1941
040A 650C F500 0015 0001 0A65 0CF5 8000 0001 0001 0002 C350 0101 0002 0040
0101 0040
0200 4005 0400 0000 64C0 1010 800A 0502 0000 0064 0002 FFFF 0000 2774 800A
040A
6500 FE80 0904 0A65 0CF5

Dec  2 17:19:07.064: BGP: 10.101.0.254 local error close after sending
NOTIFICATION

Dec  2 17:19:07.064: %BGP-5-NBR_RESET: Neighbor 10.101.0.254 reset (BGP
Notification sent)

Dec  2 17:19:07.064: BGP: nbr_topo global 10.101.0.254 VPNv4 Unicast:base
(0x1132A048:1) NSF delete stale NSF not active

Dec  2 17:19:07.064: BGP: nbr_topo global 10.101.0.254 VPNv4 Unicast:base
(0x1132A048:1) NSF no stale paths state is NSF not active

Dec  2 17:19:07.064: BGP: nbr_topo global 10.101.0.254 VPNv4 Unicast:base
(0x1132A048:1) Resetting ALL counters.

Dec  2 17:19:07.064: BGP: nbr_topo global 10.101.0.254 L2VPN Vpls:base
(0x1132A048:1) NSF delete stale NSF not active

Dec  2 17:19:07.064: BGP: nbr_topo global 10.101.0.254 L2VPN Vpls:base
(0x1132A048:1) NSF no stale paths state is NSF not active

Dec  2 17:19:07.064: BGP: nbr_topo global 10.101.0.254 L2VPN Vpls:base
(0x1132A048:1) Resetting ALL counters.

Dec  2 17:19:07.064: BGP: 10.101.0.254 closing

Dec  2 17:19:07.064: BGP: ses global 10.101.0.254 (0x1132A048:1) Session
close and reset neighbor 10.101.0.254 topostate

Dec  2 17:19:07.064: BGP: nbr_topo global 10.101.0.254 L2VPN Vpls:base
(0x1132A048:1) Resetting ALL counters.

Dec  2 17:19:07.064: BGP: ses global 10.101.0.254 (0x1132A048:1) Session
close and reset neighbor 10.101.0.254 topostate

Dec  2 17:19:07.064: BGP: nbr_topo global 10.101.0.254 VPNv4 Unicast:base
(0x1132A048:1) Resetting ALL counters.

Dec  2 17:19:07.064: BGP: 10.101.0.254 went from Closing to Idle

Dec  2 17:19:07.064: %BGP-5-ADJCHANGE: neighbor 10.101.0.254 Down BGP
Notification sent

Dec  2 17:19:07.064: %BGP_SESSION-5-ADJCHANGE: neighbor 10.101.0.254 L2VPN
Vpls topology base removed from session  BGP Notification sent

Dec  2 17:19:07.064: BGP: ses global 10.101.0.254 (0x1132A048:1) Removed
topology L2VPN Vpls:base

Dec  2 17:19:07.064: %BGP_SESSION-5-ADJCHANGE: neighbor 10.101.0.254 VPNv4
Unicast topology base removed from session  BGP Notification sent

Dec  2 17:19:07.064: BGP: ses global 10.101.0.254 (0x1132A048:1) Removed
topology VPNv4 Unicast:base

Dec  2 17:19:07.064: BGP: ses global 10.101.0.254 (0x1132A048:1) Removed
last topology

Dec  2 17:19:07.064: BGP: nbr global 10.101.0.254 Open active delayed
14336ms (35000ms max, 60% jitter)

Dec  2 17:19:07.064: BGP: nbr global 10.101.0.254 Active open failed - open
timer running

u all

All possible debugging has been turned off

Aaron

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