I have 2 routers connected by an HP switch. The 2 routers have incomplete ARP entries for each other. The switch sees the correct MAC address on their respective ports. I've changed cables on both sides, moved switch ports for both devices, and have not been able to resolve this. One router will have an ARP entry for the other every so often, but still no comms between the two. I've assigned static ARP entries just for kicks, and got the same results. Here are more specifics about each router:
Router 1: 2801 (12.4(22)T) port F0/1
Router 2: 3825 w/ HWIC-4ESW port F0/0/3 (in assigned access vlan)
I've also noticed that the vlans on the HWIC module apparently are completely independent of the vlans defined on the router itself. For example, I have G0/1 of my 3825 trunked with 2 subinterfaces (vlan 8 & 40). I have vlan 500 assigned to one of my HWIC ports. The router vlan database only shows the HWIC vlan definitions.
Is there anything else I can try to narrow the problem down? I tried removing all assigned vlans on the HWIC card, but still no luck.
can you provide more information on the VLAN and sub interface config of the routers. Also if possible connect backto back and ensure that the communication happens properly. then you may proceed to switch.
Hope that the hp switch interface leading to the routers are carrying all required vlans ?
Thanks everyone for your replies. All ports are treated as access ports. These are the interfaces in question that cannot seem to ARP. It acts as if they are in the wrong vlan, but the HP switch has both ports in vlan 500 as untagged (i.e. access port or native vlan on a trunk)
Turned out that HP Procurve switches do not run spanning tree by default. I was able to fix it two ways: (1) Enable spanning tree on the HP, or (2) Disable spanning tree on the 2801 HWIC-4ESW. Either way, it's happy now.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...