What do you mean when saying "But router A advertise routes from other enterprise." ? How does this advertisement happen? If it is done via redistribution, then filtering of resulting external routes at the originating ASBR (distribute-list out) might be an option (depends on the reason for those advertisements, whether they are needed elsewhere in the network or not). Filtering of the externals in the out direction can only be done at the originating ASBR.
How does router A become aware of the routes of the other enterprise in the first place? Is router A running OSPF with one of the other enterprise routers? Or some other routing protocol?
Incoming LSA filtering (distribute-list in) on routers B, C will only cause routes not to be put in their routing tables (the LSAs will still be propagated). Incoming LSA filtering is not a recommended configuration:
What's going on when the OSPF database is not consistent within the same area. How do we know that the routing is using an optimal path and see the same picture in that area.Let LSAs are advertised through the area. You can filter routes in the ospf database from being installed in the routing table by using a command.
Router A is not in the OSPF and i use static route. My goal is to have only one active route to subnet 10.2 and 10.3. With this configuration in router B and C, all my router in OSPF know subnet 10.2 and 10.3 from 2 routers but add route from B only.
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...
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...