on your border router(s), between your two companies, you could use two instances of eigrp until you were able to combine the new company into your existing autonomous system. this plus any redistribution required should work.
this would probably be easiest and should not require any metric changes to make it work.
this does have its drawbacks with requiring twice or more of the resources currently used on your router(s)
if your router(s) did not have the required resources ie: cpu, memory, etc., this could lead to network degredation or in a worst case.....outage.
NOTE: (cisco does not recommend using multiple instances of eigrp with mutual redistribution due to the possibility of discrepancies in the routing table.)
(i've seen it done though in the tight spots where there was no other choice)
This will work, but with mutual redistribution you should be careful to observe the cardinal rule of redistribution; never allow redistribution of networks back into the protocol that originated them. As an example, if AS1 is all 192.168.X.X and the AS2 is 10.X.X.X you should use route maps to ensure that 192.168.X.X is not redistributed from AS2 to AS1, and that 10.X.X.X is not sent from AS1 to AS2.
with ref to "As an example, if AS1 is all 192.168.X.X and the AS2 is 10.X.X.X you should use route maps to ensure that 192.168.X.X is not redistributed from AS2 to AS1, and that 10.X.X.X is not sent from AS1 to AS2"
Are you saying that if I redistrubute 1 AS into another AS , the one that is been redistributed in could try and advertise it back to AS 1 where it originated ?
Yes, if you are doing mutual (both ways) redistribution without filtering that is what will happen. This is the most common source of problems with redistribution.
The doc I posted has config examples of using route maps to avoid this.
Avoiding Problems Due to Redistribution
In the section on administrative distance you saw how redistribution can potentially cause problems such as below optimal routing, routing loops, or slow convergence. Avoiding these types of problems is really quite simple?never announce the information originally received from routing process X back into routing process X.
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.