Internet Router--->3550 Switch-->Nortel Contivity
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.
Mar 25 11:17:17.990 EDT: IP ARP: creating incomplete entry for IP address: 220.127.116.11 interface Vlan100
Mar 25 11:17:17.990 EDT: IP ARP: sent req src 18.104.22.168 0012.800b.a780,dst 22.214.171.124 0000.0000.0000 Vlan100
Internet RTR#sh log
Mar 25 11:17:17 EDT: IP ARP: rcvd req src 126.96.36.199 0012.800b.a780, dst 188.8.131.52 GigabitEthernet0/1
Mar 25 11:20:54 EDT: IP ARP: rcvd req src 184.108.40.206 0018.b964.66fc, dst 220.127.116.11 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.