-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com

Midwest-IX
http://www.midwest-ix.com

From: "Jay Hennigan" <jay@west.net>
To: nanog@nanog.org
Sent: Monday, April 3, 2023 1:02:42 AM
Subject: Re: Cisco Nexus 3k Route Selection\Packet Forwarding Debugging

On 4/2/23 22:21, Mike Hammett wrote:
> We have a Nexus 3064 that is setup with partial BGP tables and is
> routing based on that.
>
>
> I've done a show ip bgp for an IP of interest and it has an expected
> next hop IP. I show ip arp on that next hop IP and it has the expected
> interface.
>
>
> However, sFlows show the packets leaving on a different interface, the
> one that would carry the default route for routes not otherwise known.
>
>
> If the next hop IP is expected and the ARP of that next hop IP is
> expected, why are packets leaving out an unexpected interface?

Another route to the destination from a routing protocol with a lower
distance?

What does "show ip route [destination]" look like?

--
Jay Hennigan - jay@west.net
Network Engineering - CCIE #7880
503 897-8550 - WB6RDV