[FROG] IPv6 bgp not working properly

Donald Sharp sharpd at cumulusnetworks.com
Sat Jan 11 08:20:31 EST 2020


Can we see the `show ipv6 route` output?

donald

On Sat, Jan 11, 2020 at 8:07 AM Patrick Boutilier <boutilpj at ednet.ns.ca> 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.
>
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> >
>
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