03-24-2020 02:07 AM
Hello
Quick question.
I know bgp bestpath as-path multipath-relax is working for IPv4, but what about IPv6 route loadbalancing?
I did lab it in GNS3, but it didn't give the expected output for IPv6.
For IPv4 before/after implementation of bgp bestpath as-path multipath-relax
#show ip bgp 0.0.0.0 BGP routing tshow ip bgp 0.0.0.0 able entry for 0.0.0.0/0, version 21 Paths: (3 available, best #2, table Default-IP-Routing-Table) Flag: 0x840 Advertised to update-groups: 1 2 200, (received & used) 200.200.200.1 from 200.200.200.1 (200.200.200.1) Origin IGP, metric 0, localpref 100, valid, external 100, (received & used) 100.100.100.1 from 100.100.100.1 (100.100.100.1) Origin IGP, metric 0, localpref 100, valid, external, best #show ip bgp 0.0.0.0 BGP routing table entry for 0.0.0.0/0, version 30 Paths: (3 available, best #2, table Default-IP-Routing-Table) Multipath: eBGP Advertised to update-groups: 1 2 200, (received & used) 200.200.200.1 from 200.200.200.1 (200.200.200.1) Origin IGP, metric 0, localpref 100, valid, external, multipath 100, (received & used) 100.100.100.1 from 100.100.100.1 (100.100.100.1) Origin IGP, metric 0, localpref 100, valid, external, multipath, best
But if I try the same for IPv6 I see no difference in output before/after
#sh bgp ipv6 unicast ::/0 BGP routing table entry for ::/0, version 2 Paths: (3 available, best #2, table Global-IPv6-Table) Advertised to update-groups: 1 2 200 2200::1 (FE80::C005:9DFF:FEAF:1) from 2200::1 (200.200.200.1) Origin IGP, metric 0, localpref 100, valid, external 100 1100::1 (FE80::C004:9DFF:FE90:1) from 1100::1 (100.100.100.1) Origin IGP, metric 0, localpref 100, valid, external, best #sh bgp ipv6 unicast ::/0 BGP routing table entry for ::/0, version 2 Paths: (2 available, best #2, table Global-IPv6-Table) Advertised to update-groups: 1 2 200 2200::1 (FE80::C005:9DFF:FEAF:1) from 2200::1 (200.200.200.1) Origin IGP, metric 0, localpref 100, valid, external 100 1100::1 (FE80::C004:9DFF:FE90:1) from 1100::1 (100.100.100.1) Origin IGP, metric 0, localpref 100, valid, external, best
Is this a GNS3 issue, doesn't it work for IPv6 or is it just me :o)
Thank you in advance.
Solved! Go to Solution.
03-24-2020 07:44 AM
Hello @jni ,
can you post the configuration of your router , at least the router BGP section ?
Have you applied the command ar router bgp level or within an address family ?
ipv4 unicast
ipv6 unicast
It can also be a limitation of GNS3, but more info is needed to provide some help.
Hope to help
Giuseppe
03-24-2020 07:46 AM
Argh... my own fault
I forgot to add maximum-paths under the ipv6 address-family. This of course has to be added under each address-family. My bad.
03-24-2020 07:44 AM
Hello @jni ,
can you post the configuration of your router , at least the router BGP section ?
Have you applied the command ar router bgp level or within an address family ?
ipv4 unicast
ipv6 unicast
It can also be a limitation of GNS3, but more info is needed to provide some help.
Hope to help
Giuseppe
03-24-2020 07:48 AM
Since you where the only one to reply, and that you probably would have spottet the error when I posted the configuration, I accept your answer (but as I stated I didn't state maximum-paths under address-family ipv6)
03-24-2020 07:52 AM
Hello @jni ,
when dealing with MP BGP most of the commands become per address family,
So my suggestion was a guess of what could be the most reasonable cause of the issue based on experience.
I'm happy to have been of help
Best Regards
Giuseppe
03-24-2020 07:46 AM
Argh... my own fault
I forgot to add maximum-paths under the ipv6 address-family. This of course has to be added under each address-family. My bad.
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