Command Reference Guide
Crypto Map IKE Command Set
Technology Review
The reverse route injection allows a crypto IPSec policy to inject static routes to a remote network into its
own route table, leaving it to the configuration of routing protocols to propagate the routes within the
network. Reverse route injection serves as a method of updating routing tables when using a backup VPN
server. In case one VPN is taken down or is unreachable, the VPN peer's route is removed out of the VPN
gateway's route table and other route tables within the network.
Administrative distance is a feature that routers employ in order to select the most reliable path when there
are two or more routes to the same destination from two different routing protocols. Administrative distance
defines the reliability of a routing protocol by assigning a value (the smaller the value, the more trustworthy
the protocol) that is then used by the router to organize routing protocols according to reliability.
60000CRG0-35E
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