I just started learning about route-maps & prefix-list. It was confusing but I did a small lab in gns3 which has helped me to gain more clarity. I have created a simple mind-map to reference until I cement down the logic.
I wanted to ask if you could review to make sure I am understanding this correctly. I applied this in an eigrp instance with distribute-list 'in'
when using route-maps for filtering redistributions or distribute-list the key command is in the route-map clause
A route-map clause (block) with a permit action will allow prefixes that are a match for the underlying ACL or prefix-lists and those prefixes permitted will be allowed / sent / redistributed with no further processing of other route-map blocks.
IF the route-map action is permit and the prefix is not permitted on the prefix-list or ACL it will be processed by following blocks if any. If no other route-map blocks exist the prefix will be denied by implicit deny any in the route-map logic.
If the route-map action is deny and the prefix is allowed (= permit in the ACL or prefix-list ) the prefix will be denied = filtered with no further processing.
I f the route-map action is deny and the prefix is not allowed (=deny in ACL or prefix-list or implicit deny at the end) the prefix will be processed by following route-map blocks using the same logic explained above.
To be noted when using a route-map for PBR the implicit deny any becomes use standard destination based routing for all prefixes hitting this point.
So as noted in different contexts a prefix denied by a route-map can be simply routed by destination.
Cisco recently announced the availability of the IOS-XE train – IOS-XE Cupertino 17.7.1. This is a standard maintenance release supporting switching, wireless, SP-Access, Routing as well as IoT (Internet of things) platforms with a sustaining support life...
What is AppQoE?
AppQoE is a WAN optimization stack and optimizes WAN traffic for different use cases for applications that are deployed on-prem or in cloud.
What are the benefits of using AppQoE?
AppQoE improves application experience by d...
The application delivery challenges have been the enemy of network since the advent of Internet. So, what are these application delivery challenges that can bring down a network to its heels?
Above are some of the common problems faced not only by tradit...
It is our pleasure to officially announce the finalists in the 2021 IT Blog Awards. Now we are looking to YOU, our amazing tech community, to weigh in. Check out the amazing educational content we've uncovered and vote for your favorites before Friday, Fe...