Route Map Impicit deny

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In the CCNP-Route Episode a route map statement contained an empty permit statement for redistribution of connected routes in order to permit all others. (I assume there must be an implicit deny??)

route-map connected-to-ospf permit 50

In the CCNP- PBR Episode a route map was created that did not contain a permit statement that was empty.

Why?

I think this is not very clear. In my search for an answer, this appears to be very unclear to other people as well.

Thanks.

@douglas-stamer,

When using route maps to filter redistribution, the permit or deny only determines whether the route will be redistributed. Routes not defined in route map will not be redistributed because there is an implicit deny all at the end of each route map.

In PBR, route maps behave differently:

1. If a route map has a deny statement, this means forward traffic according to the routing table and not the PBR. The set statement is not to be applied to packets
2. There is an implicit deny at the end of the route map to deny all packets but if the packet doesn’t match anything in the route map and matches the implicit deny. The traffic just tells it follow the normal routing table and doesn’t stop the traffic.
3. This is why the allow all was not needed int the PBR example.

(We've been on vacation since 16 December 2016 and though I answered a few questions during that time, I didn't see this one to try and answer. My apologies for the late answer).