Passive Interface When Facing Different AS
In CCNP Route lab manual, chapter 6-4
There are two border routers. Their interfaces face different EIGRP AS.
I realized that they cannot ping each other when only EIGRP is configured.
What is the purpose of configuring passive interfaces when they are already in different AS?
There are two border routers. Their interfaces face different EIGRP AS.
I realized that they cannot ping each other when only EIGRP is configured.
What is the purpose of configuring passive interfaces when they are already in different AS?
Comments
-
networker050184
Mod Posts: 11,962 Mod
The passive interface get's the interface IPs into the routing table without forming a neighbor relationship on the link.An expert is a man who has made all the mistakes which can be made. -
networker050184
Mod Posts: 11,962 Mod
They won't necessarily automatically form a neighbor, but it's a safe guard. You don't want to be attempting to form a neighbor outside of your networks bounds. You open yourself up to misconfigurations and malicious activity.An expert is a man who has made all the mistakes which can be made.