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

[Nick Ryce]

Hi Jason,

CSCuh05321 says it is fixed in the S1 release so would that not mean that it is also in S1a?

Nick


On 19 Nov 2013, at 03:50, Jason Lixfeld <jason at lixfeld.ca<mailto:jason at lixfeld.ca>> wrote:

Just be mindful of CSCuh05321 if you are going to try S1a.  If you think you might hit that, I'd suggest moving to static vpls and skip that release until it's fixed.

Also, with S1a, look at CSCtl54835 and verify or else your isis adjacencies will break.

Sent from my iPhone

On Nov 18, 2013, at 10:08 PM, Nick Ryce <nick at fluency.net.uk<mailto:nick at fluency.net.uk>> wrote:

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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