Oh sorry I should've been more specific.

On Dell OS10E and NX-OS:

In the case of
Vlan 145
Int vlan 145
Ip address 10.1.0.1/29

sh ip arp vlan 145 only shows 10.1.0.2, 10.1.0.3 but never the router's own 
ip/MAC address in the arp table.

I was just trying to determine whether the 'right way' is how it used to work 
(where it showed the router's own IP/mac in the arp table) or if the right way 
is how it is done now.

Thanks,
-Drew

-----Original Message-----
From: Gustaf Hyllested ServĂ© <[email protected]> 
Sent: Thursday, October 28, 2021 9:15 AM
To: Drew Weaver <[email protected]>; [email protected]
Subject: Re: [c-nsp] 'show ip arp' intended functionality

Show ip arp, returns the learned (or configured) mappings between MAC-addresses 
and IP-addresses that the network-stack communicates with. So a layer2 switch 
probably only show it's default gateway and other devices that the 
management-plane have communicated with. A local router (or "layer 3 switch") 
will at most times have all (active) devices on the networks it serves in its 
arp-table. 

Gustaf Hyllested Serve


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