Wednesday, March 6, 2019

I need a sanity check on a Cisco 800 router going to an HPe 5412 switch.

The router has an 100mb interface in access VLAN 40, and the VLAN has a /22 IP address on it, hard coded to 100-full. I don't have access to the router, but have seen the config.

If I connect to a port on the 5412, hard code to 100-full(I've tried with both sides auto as well). I put the port in 'untagged 25'(Same as access in Cisco). I gave VLAN 25 an IP address on the same subnet /22.

The HP can see the MAC of the router via sh mac-addr. HP can see the router via CDP neighbor. Link lights are good, but they cannot ping each other.

Does anyone have any clue as to why?

I was able to take that router, connect it to a dumb switch, and connect the dumb switch to a Nexus switch on the same VLAN with the IP address, and they can ping each other just fine. And I had to use the dumb switch because the router is 100mb, and the Nexus only does 1-10 gigabit.

Any guidance on this would be greatly appreciated.

EDIT: And the logs don't really say anything. Nothing about spanning tree, which some forum posts suggested.



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