Hi,
We are currently working to bring AS3223 live as a transit provider for IPv4 and IPV6 however when bringing IPv6 live we are running in to an issue where traffic via them becomes unreachable and doesn't leave our network. We've worked with them to establish that it's not an issue with their network and from our side too the configuration is the same as other connections we have.
I have included output of the route to Google which is one that we know is affected. What I have noticed is that the best path stays the same which is via a peering exchange however the source interface changes which is presumably why the traffic then stops working.
I don't understand why the source interface changes and things then stop working though when bringing up AS3223. I've tried using update-source and ipv6 next-hop commands but this doesn't change things.
Before:
sh bgp ipv6 unicast 2607:f8b0::/32
BGP routing table entry for 2607:F8B0::/32, version 86683745
BGP Bestpath: deterministic-med
Paths: (4 available, best #4, table default)
Multipath: eBGP
Not advertised to any peer
Refresh Epoch 1
174 6453 15169
XXXXXX::1C1:1 (FE80::2C1:64FF:FE5D:FEE0) from XXXXXX1::1C1:1 (XXXXXX.1.207)
Origin IGP, metric 9020, localpref 100, valid, external
Community: XXXXX:1003
rx pathid: 0, tx pathid: 0
Refresh Epoch 1
174 6453 15169, (received-only)
XXXXXX::1C1:1 (FE80::2C1:64FF:FE5D:FEE0) from XXXXXX::1C1:1 (XXXXXX.1.207)
Origin IGP, metric 9020, localpref 100, valid, external
Community: 174:21100 174:22010
rx pathid: 0, tx pathid: 0
Refresh Epoch 1
15169
XXXXXX::3B41:1 (FE80::8AA2:5EFF:FE16:887B) from XXXXXX::220A:2 (XXXXXX.225.231)
Origin IGP, metric 0, localpref 100, valid, external
Community: XXXXX:1002
unknown transitive attribute: flag 0xE0 type 0x20 length 0x18
value 0000 220A 0000 03E8 0000 0001 0000 220A
0000 03E9 0000 0002
rx pathid: 0, tx pathid: 0
Refresh Epoch 1
15169
XXXXXX::3B41:1 (FE80::8AA2:5EFF:FE16:887B) from XXXXXX::220A:1 (XXXXXX.225.230)
Origin IGP, metric 0, localpref 100, valid, external, best
Community: XXXXX:1002
unknown transitive attribute: flag 0xE0 type 0x20 length 0x18
value 0000 220A 0000 03E8 0000 0001 0000 220A
0000 03E9 0000 0002
rx pathid: 0, tx pathid: 0x0
sh ipv6 route 2607:f8b0::/32
Routing entry for 2607:F8B0::/32
Known via "bgp XXXXX", distance 20, metric 0, type external
Route count is 1/1, share count 0
Routing paths:
FE80::8AA2:5EFF:FE16:887B, TenGigabitEthernet0/0/0.91
MPLS label: nolabel
Last updated 1w4d ago
After:
sh bgp ipv6 unicast 2607:f8b0::/32
BGP routing table entry for 2607:F8B0::/32, version 86683745
BGP Bestpath: deterministic-med
Paths: (6 available, best #6, table default)
Multipath: eBGP
Not advertised to any peer
Refresh Epoch 1
3223 1299 15169
XXXXXX:4::4 (FE80::211:11FF:FE2A:7ECB) from XXXXXX:4::7 (XXXXXX.172.110)
Origin IGP, localpref 100, valid, external
Community: XXXXX:1004
rx pathid: 0, tx pathid: 0
Refresh Epoch 1
3223 1299 15169, (received-only)
XXXXXX:4::4 (FE80::211:11FF:FE2A:7ECB) from XXXXXX:4::7 (XXXXXX.172.110)
Origin IGP, localpref 100, valid, external
Community: 3223:888
rx pathid: 0, tx pathid: 0
Refresh Epoch 1
174 6453 15169
XXXXXX::1C1:1 (FE80::2C1:64FF:FE5D:FEE0) from XXXXXX::1C1:1 (XXXXXX.1.207)
Origin IGP, metric 9020, localpref 100, valid, external
Community: XXXXX:1003
rx pathid: 0, tx pathid: 0
Refresh Epoch 1
174 6453 15169, (received-only)
XXXXXX::1C1:1 (FE80::2C1:64FF:FE5D:FEE0) from XXXXXX::1C1:1 (XXXXXX.1.207)
Origin IGP, metric 9020, localpref 100, valid, external
Community: 174:21100 174:22010
rx pathid: 0, tx pathid: 0
Refresh Epoch 1
15169
XXXXXX::3B41:1 (FE80::8AA2:5EFF:FE16:887B) from XXXXXX::220A:2 (XXXXXX.225.231)
Origin IGP, metric 0, localpref 100, valid, external
Community: XXXXX:1002
unknown transitive attribute: flag 0xE0 type 0x20 length 0x18
value 0000 220A 0000 03E8 0000 0001 0000 220A
0000 03E9 0000 0002
rx pathid: 0, tx pathid: 0
Refresh Epoch 1
15169
XXXXXX::3B41:1 (FE80::8AA2:5EFF:FE16:887B) from XXXXXX::220A:1 (XXXXXX.225.230)
Origin IGP, metric 0, localpref 100, valid, external, best
Community: XXXXX:1002
unknown transitive attribute: flag 0xE0 type 0x20 length 0x18
value 0000 220A 0000 03E8 0000 0001 0000 220A
0000 03E9 0000 0002
rx pathid: 0, tx pathid: 0x0
sh ipv6 route 2607:f8b0::/32
Routing entry for 2607:F8B0::/32
Known via "bgp XXXXX", distance 20, metric 0, type external
Route count is 1/1, share count 0
Routing paths:
FE80::8AA2:5EFF:FE16:887B, TenGigabitEthernet0/0/0.91
MPLS label: nolabel
Last updated 1w4d ago
