Refer to the exhibit. R5 should not receive any routes originated in the EIGRP domain. Which set of configuration changes removes the EIGRP routes from the R5 routing table to fix the issue?
A.
R4 route-map O2R deny 10 match tag 111 route-map O2R permit 20 ! router rip redistribute ospf 1 route-map O2R metric 1
B.
R2 route-map E20 deny 20 R4 route-map O2R deny 10 match tag 111 ! router rip redistribute ospf 1 route-map O2R metric 1
C.
R4 route-map O2R permit 10 match tag 111 route-map O2R deny 20 ! router rip redistribute ospf 1 route-map O2R metric 1
D.
R4 route-map O2R deny 10 match tag 111 ! router rip redistribute ospf 1 route-map O2R metric 1
A is the answer
Explanation
In this question, routes from EIGRP domain are redistributed into OSPF (with tag 111) then RIPv2 but
without any filtering so R5 learns all routes from both EIGRP and OSPF domain. If we only want R5 to
learn routes from OSPF domain then we must filter out routes with tag 111 and permit other routes.
The line “route-map O2R permit 20” is important to allow other routes because of the implicit deny all
at the end of each route-map
Chosen answer is correct
R4
route-map O2R deny 10
match tag 111
route-map O2R permit 20 !
router rip
redistribute ospf 1 route-map O2R metric 1
upvoted 3 times
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