[c-nsp] Possible split horizon issue with bgp signalled vpls

[Nick Ryce]

Just found 1 switch on 15.3(2)S so may be worth a punt and upgrade

Nick
On 19 Nov 2013, at 02:02, Jason Lixfeld <jason at lixfeld.ca<mailto:jason at lixfeld.ca>> wrote:

Issues I was having with BGP signalled VPLS a couple of months ago in 15.3(2)S1 resulted in filing CSCui46390.  I'd otherwise suggest trying 15.3(3)S1a to see fix works, but that version seems to have introduced CSCuh05321, so I think that might end badly for you; it did for me :(

On Nov 18, 2013, at 3:05 PM, Nick Ryce <nick at fluency.net.uk<mailto:nick at fluency.net.uk>> wrote:

Hi,

I’m tearing my hair out with this one and can’t figure out how to resolve it.

I have 3 switches that have a BGP signalled VPLS with customer routers hanging off the end of all 3 ( one switch has 2 cpe )

All have the RD 56595:4 and RT 56595:4

All pseudo wires are up between the switches with config snippets below:-

Switch 1

VFI name: FLVPLS004, state: up, type: multipoint, signaling: BGP
VPN ID: 4, VE-ID: 3, VE-SIZE: 10
RD: 56595:4, RT: 56595:4, 56595:4
Bridge-Domain 903 attachment circuits:
  Vlan903
Neighbors connected via pseudowires:
Interface          Peer Address    VE-ID  Local Label  Remote Label    S
pseudowire100033   46.226.0.9      2      402          39              Y
pseudowire100037   46.226.0.14     1      401          49              Y

This switch has 1 cpe with any vlan tags stripped and can ping all devices on the other switches


Switch 2

VFI name: FLVPLS004, state: up, type: multipoint, signaling: BGP
VPN ID: 4, VE-ID: 1, VE-SIZE: 10
RD: 56595:4, RT: 56595:4, 56595:4
Bridge-Domain 11 attachment circuits:
  Vlan11
Neighbors connected via pseudowires:
Interface          Peer Address    VE-ID  Local Label  Remote Label    S
pseudowire100015   46.226.0.12     3      49           401             Y
pseudowire100018   46.226.0.9      2      48           37              Y

This switch has 2 cpe’s with any vlan tags stripped.  They can ping each other and the device connected to switch 1 but cannot ping device on switch 3

Switch 3

VFI name: FLVPLS004, state: up, type: multipoint, signaling: BGP
VPN ID: 4, VE-ID: 2, VE-SIZE: 10
RD: 56595:4, RT: 56595:4, 56595:4
Bridge-Domain 4 attachment circuits:
  Vlan4
Neighbors connected via pseudowires:
Interface          Peer Address    VE-ID  Local Label  Remote Label    S
pseudowire100028   46.226.0.12     3      39           402             Y
pseudowire100027   46.226.0.14     1      37           28              Y

This switch has 1 cpe device connected with any vlan tags stripped and can only ping the device on switch 1


Each switch can see all the correct mac addresses.

It sounds like split horizon but I assumed this was only to do with the local switch?

All devices are running 15.3(3)S

Any help much appreciated.

Nick




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