Limiting EIGRP Quiery Range.

There are three methods to limiting Eigrp Queries.


1, Design the network with a redundant wan links from remote site to NAP or distribution site. Run Default or Static routes between Remote Sites and Distribution or NAP sites. Run Eigrp between NAP /Distribution Sites and Central Sites or Data Centers. By configuring this we can limit the queries to Distribution sites.

2, Configure Eigrp Summary Routes with ip summary—address eigrp command on interfaces.

For Example, on a typical connectivity of A, B, C Router B send a Summary route of 172.50.0.0/16 to Router A. When Network 172.50.3.0/24 goes down .Router A receives a query from Router B about that Network. Because router A has only a Summary Route, that specified network is not in the routing table. Router A replies to the query with a “network 172.50.30.0/24 unreachable” message, hence the query will stop here.

“A Remote Router extends the query about the network only if it has an exact match in the routing table”
3, Configure remote routers as Eigrp Stub.

Eigrp Stub routers not queried. Instead, hub routers connected to the stub routers answer the query on behalf of the stub router. Eigrp hub routers will not use Stub Routers as a Transit path. Remote Router configured as Stub does not advertise the hub routes back to the hub routers.