That would probably cause the check to pass, but that route will cause VPP to
ARP for the loopback address out of <iface> so the peer would also need to
enable proxy ARP.
However, If a-priori knowledge of what is connecting to what is allowed in the
workaround, then add a static ARP entry on the peer.
/neale
On 20/08/2020 09:01, "Benoit Ganne (bganne)" <bga...@cisco.com> wrote:
Maybe a workaround would be to add the host prefix of the router loopback
in the fib?
Eg. 'ip route add <loopback>/32 <iface>'?
Best
ben
> -----Original Message-----
> From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Neale Ranns
> via lists.fd.io
> Sent: jeudi 20 août 2020 08:07
> To: vpp-dev@lists.fd.io; Satya Murthy <satyamurthy1...@gmail.com>
> Subject: Re: [vpp-dev] ARP resolution from non-connected IP
>
>
> There's no way to disable the check. VPP expects the ARP request to have
> only address that belong to the link on which the ARP packet is sent. IMHO
> the sender's behaviour is wrong.
>
>
> /neale
>
>
> tpyed by my fat tumhbs
>
> ________________________________
>
> From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> on behalf of Satya Murthy
> <satyamurthy1...@gmail.com>
> Sent: Wednesday, August 19, 2020 3:03:49 PM
> To: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io>
> Subject: [vpp-dev] ARP resolution from non-connected IP
>
>
> Hi,
>
>
>
> Have a query on the ARP resolution.
>
>
>
> We have a Router and VPP-box connected.
>
>
>
> We are trying to do some peering from router’s loopback IP. This loopback
> IP is not in the connected subnet-range.
>
> Due to this, router is initiating an ARP request with src as non-
> connected-IP in the payload.
>
>
>
> VPP is dropping this ARP request saying “IP4 source address not local to
> subnet”.
>
>
>
> In linux and in cisco routers, we have options to allow ARP requests from
> non-connected subnets.
>
> Is there any workaround in VPP to allow this ARP request.
>
>
>
> Please let us know.
>
> --
> Thanks & Regards,
> Murthy
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