We have a Cisco 2621 connected to a pair of firewalls with failover enabled. During failover testing, we found that with the backup active, not all inbound IP traffic was being processed. Restarting the router fixed this problem. When the primary came back on line, the router had to be reset again. We looked at the defined routes and the route to our IP block is listed as a permanent route. Other static routes are not listed as permanent. Does this designation as a permanent route "lock" in the MAC address of the next device?
Both firewalls are connected to a hub, which is connected to the 2621. We have solved the problem. We found the lack of expiration for the ARP entries on the 2621 were the root of the problem. The ARP cache on the 2621 was not set with a timeout value and the firewalls did not force an ARP update when they came on line. The 2621 was trying to route traffic to the MAC address of the "down" firewall. By setting a timeout value on the 2621 we force a process where the ARP table entries expire before the failover firewall comes on line. The 2621 then discovers the new device and builds an ARP table for it.
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
login w/ SSH 1 or 2 to the device compare to IOS device. After
investigation, the there is 1s delay between the client KEXDH_INIT and
the server (XR) KEXDH_REPLY. After debug ssh serv...
Introduction The purpose of this document is to demonstrate the Open
Shortest Path First (OSPF) behavior when the V-bit (Virtual-link bit) is
present in a non-backbone area. The V-bit is signaled in Type-1 LSA only
if the router is the endpoint of one or ...
Hi, I am seeing quite a few issues with patch install and wanted to
share my experience and workaround to this. Login to admin via CLI, then
access root with the “shell” command Issue “df –h” and you’ll probably
see the following directory full or nearly ...