a) deploy OSPF in parallel with EIGRP in all routers in the domain. For the higher AD of OSPF in comparison to EIGRP's AD no changes in the routers routing tables and no issues/impacts.
OSPF database will be populated in all routers.
Using the command sh ip ospf database you can compare the OSPF topology to the EIGRP topology.
(sh ip eigrp topology)
If OSPF DB information is complete the last step to be done in a maintanaince window is:
change the AD of all EIGRP routes (including summary routes to values greater then 110)on all routers.
Verify IP connectivity.
If everything is fine your migration is ended successfully.
b) you could use an approach with ASBR routers:
you divide your EIGRP domain in sub-domains and start to introduce OSPF in the core.
Routers connecting each sub-domain to core will implement EIGRP to OSPF redistribution and can inject a default route to the internal routers or can redistribute also from OSPF to their EIGRP process (in a controlled filtered way)
Later, you migrate each EIGRP sub-domain to OSPF in the same way as described in point A.
We used approach A some years ago to migrate a mobile phone provider IP network with good results.
Well, I do not need to answer you on the forum since you will not like my answer. Anyways I would recommend you to stop using this forum since this forum is for learning and not commenting on anyone's capabilities.
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...