Internet Router--->3550 Switch-->Nortel Contivity
63.169.164.134-->63.169.164.140--> 63.169.140.136
All the devices are having public IP addresses and are in Vlan 100.
Sometimes the Internet Router is not able to ping or connect to the Contivity where as the switch is able to access both the devices (Internet Rtr & Contivity).
While checking on the switch & Internet rtr i capture the following logs.
Switch#sh log
Mar 25 11:17:17.990 EDT: IP ARP: creating incomplete entry for IP address: 63.169.164.136 interface Vlan100
Mar 25 11:17:17.990 EDT: IP ARP: sent req src 63.169.164.140 0012.800b.a780,dst 63.169.164.136 0000.0000.0000 Vlan100
Internet RTR#sh log
Mar 25 11:17:17 EDT: IP ARP: rcvd req src 63.169.164.140 0012.800b.a780, dst 63.169.164.136 GigabitEthernet0/1
Mar 25 11:20:54 EDT: IP ARP: rcvd req src 63.169.164.138 0018.b964.66fc, dst 63.169.164.145 GigabitEthernet0/1
We have done a static ARPA entry in internet rtr for Contivity but still the issue remains same. The moment the issue persists again i tried to clear the arp on switch but it didn't make router to get reply from Contivity when i did the same clear arp-cache on internet rtr, it started getting communicate with Contivity.
I am not able to find the solution of this issue and the reason for that, now every time i have to do clear ip arp-cache on rtr whenever the issue comes down.
Also i want to understand the situation when a dest mac-address can be 0000.0000.0000.
Any help on this will be appreciated.
Thanks.
