Which action resolves the issue?

Refer to the exhibit.

A network administrator configured mutual redistribution on R1 and R2 routers, which caused instability in the network.

Which action resolves the issue?
A . Set a tag in the route map when redistributing EIGRP into OSPF on R1, and match the same tag on R2 to allow when redistributing OSPF into EIGRP
B . Apply a prefix list of EIGRP network routes in OSPF domain on R1 to propagate back into the EIGRP routing domain
C . Set a tag in the route map when redistributing EIGRP into OSPF on R1 and match the same tag on R2 to deny when redistributing OSPF into EIGRP
D . Advertise summary routes of EIGRP to OSPF land deny specific EIGRP routes when redistributing into OSPF

View Answer

Answer: C

Explanation:

When doing mutual redistribution at multiple points (between OSPF and EIGRP on R 1&R 2), we may create routing loops so we should use route-map to prevent redistributed routes from redistributing again into the original domain.

In the below example, the route-map "SET-TAG" is used to prevent any routes that have been redistributed into EIGRP from redistributed again into OSPF domain by tagging these routes with tag 1: