[FROG] IPv6 bgp not working properly [SOLVED]

[Patrick Boutilier]

On 1/11/20 9:06 AM, Patrick Boutilier wrote:
> On 1/8/20 8:07 PM, Patrick Boutilier wrote:
>> On 1/8/20 9:49 AM, Tim Bray wrote:
>>> On 08/01/2020 13:42, Patrick Boutilier wrote:
>>>> Having troubles with IPv6 and bgp. Traffic comes back on the 
>>>> interface (eth4.431) connected to the bgp peer but traffic won't 
>>>> pass through the kernel to the interface the ping is coming from. 
>>>> Also I can see 4 extra ping replies with tcpdump. Works fine on old 
>>>> Quagga bgpd.
>>>>
>>>> Any ideas what could be going on?
>>>>
>>>>
>>> Sanity check
>>>
>>> more /proc/sys/net/ipv6/conf/*/forwarding
>>>
>>> and check you have all 1s
>>>
>>>
>>> (TBH, working IPv6 is the main reason to use FRR over Quagga)
>>>
>>>
>>> Tim
>>>
>>>
>>
>> All 1. Lots of vlan interfaces....
>>
>>
>> # cat /proc/sys/net/ipv6/conf/*/forwarding
>> 1
> 
> <snip>
> Turns out the issue was that the frr server couldn't route back to 
> 2620:8b:8000:0:7064:ee:ab4c:621 without adding a static route. Static 
> route was not needed with old Quagga so I will investigate why. All 
> working now with the static route in place.

Short investigation. I forgot to add the "ipv6 route" statements from 
the old quagga zebra.conf file to the new frr staticd.conf file. Sorry 
for the noise.


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