I have a Cisco router trying to communicate to a remote host on the Internet through our gateway Router. Both routers are on the same subnet. We kept having intermittent communication issues. During our troubleshooting, we noticed that the ARP table entry for the gateway router on the internal router kept showing it as "INCOMPLETE".
The only thing that would fix it would be performing a "CLEAR ARP" on the router.
Why would there be ARP issues between Routers on the same subnet? Is there a setting on the router that I need to verify/change on the interface of router ? Anyone else ever have this problem?
I want to ask a question before enabling proxy-arp that what would happen if I set arp time-out value to zero. Will it work for me ?
and one more question is that Proxy-arp is a mechanism in which a device sends its MAC address on behalf of someone else ip address. A router which is working as gateway to Internet should have proxy-arp enabled or not ? why network peoples recommends that proxy-arp should be disabled on core routers ?
I removed the arp timeout 0 command from interface and after that I tried another thing that I put down static ARP entries on both routers for each other ip addresses which is working fine for us.
Now the same issue is occuring with secondary ip addresses. Gateway Router is unable to get mac address for secondary ip address of Internal Router , I know problem will be solved if I put down static ARP entry for secondary ip address but the question I want to ask that what is the cause of this behaviour and problem is at Gateway router or at Internal Router as we have been using same routers since long.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.