Packets from a router with policy-based routing configured are failing to reach the next hop.
Which two additions can you make to the router configuration to enable the packets to flow
correctly? (Choose two.)
A.
Enable ip proxy-arp on the exiting interface.
B.
Specify the next hop as an address.
C.
Specify the next hop as an interface.
D.
Add a match-any permit statement to the route map.
Explanation: Here is an example:
Router(config)#route-map Engineers permit 20
Router(config-route-map)#match ip address 2
Router(config-route-map)#set interface Ethernet1
Here, instead of specifying a next-hop, it specifies that any packets matching this rule will be
forwarded directly out the interface Ethernet1. This means that either the destination device must
be on this segment, or there must be a router configured with Proxy ARP that can forward the
packet to the ultimate destination.
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You are probably correct, but it does say enable proxy arp “on the exiting interface”, which would not be relevant to improve reachability.
Typical cisco gotcha question.
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The explanation config used here (and elsewhere) specifies setting an Interface (Ethernet1). Yet the answer states ‘Specify an address’? Seems wrong to me?
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It’s possible to configure both:
route-map bla permit 10
match ip address 1
set ip next-hop 1.1.1.1
set interface GigabitEthernet0/0
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I labbed it. proxy arp on the exiting interface doesnt work. proxy arp has to be on the receiving side. the other router, no the local one with the route map
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Let’s think the opposite way – what is wrong.
D doesn’t make sense as packets denied by the policy are forwarded according to RIB.
A is wrong as proxy-arp may help on the next-hop router and not on “the router”.
Hence B&C.
Werid.
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