i have two cisco 3845, on both of them are configured :
- vlan100 (see below),
- a trunk ,
the issue is i cannot ping the ip address 172.16.4.1 from router 2 using as source vlan 100 (see below), in the arp table of router 2, no entry for 172.16.4.1, also router 1 is the active one for vlan 100 (see below)
It seems that there is a loss of Layer 2 adjacency between router 2 and the hosts hanging off of router 1.
Im assuming that the servers are really connected to switches, one hanging off of router 1 and the other off of router 2.
When you PING a host that the router's route table sees as "directly connected," it sends out an ARP broadcast for that host. The host should respond IF there is layer 2 continuity between the router and the host.
Im wondering if you could post a diagram and the switch configs if they exist.
Without running diagnostics on the router prior to reloading it, it is almost impossible to determine why it behaved in that erratic fashion.
I had a similar problem once and after bouncing the vlan interface, everything suddenly came up -- for a short period of time. It broke again when the network fully converged and the fact that there was another host on the network using the VIP address became evident.
Glad its working.
Clear the logs. Get some baseline information. And keep an eye on it.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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