OSPF Routes keep being refreshed every 50 Seconds!
I have a LAN conisisting of 6500 Switches with SUP 720's running 12.2(18)SEX4, using OSPF throughout.
Though the network is stable and we do not see any connectivity issues, I have noticed that every 50 secs, the OSPF routes keep getting refreshed. I would not expect these routes to refresh every 50 secs unless possibly there was an OSPF timer inconsistancy.
I have attached a text file showing this.
Can anyone explain this behaviour and what might be the cause?
Re: OSPF Routes keep being refreshed every 50 Seconds!
I think there is a reasonable explanation for this. The routes that you see getting refreshed are external routes. What protocol are you redistributing these routes from ? My guess is that the external OSPF routes are getting refresh every time you receive an update from this other protocol that is redistributed into OSPF. You will not find internal OSPF routes doing this.
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
Q1: What are all the channel operational states from a BR (border role) perspective and what are the rules/conditions to be in each st...
The need was to reach an host inside a LAN through a VPN connection managed by the LAN gateway (Cisco 1921).
The LAN gateway performs NAT and there was a dedicate nat rule for the host i wanted to reach through VPN.
I couldn't connect to the hos...