Cisco Nexus 3k Route Selection\Packet Forwarding Debugging

Mon Apr 3 06:02:42 UTC 2023

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 at west.net
Network Engineering - CCIE #7880
503 897-8550 - WB6RDV