Redundant Internet on a Cisco Router - Should You Add a Specific Route for the IP Tracked by IP SLA?
18After receiving several emails from viewers curious about whether it is actually necessary to configure a specific route for the IP SLA-tracked IP in a redundant ISP setup, I thought I would make a video where I take a deeper dive into the topic.
The main focus of this video is to show what is likely to happen if this route is not configured and how it could impact the reliability of your ISP failover setup. If you're just looking for a straightforward answer, it's simple: the answer is yes, you do need this route. But for those of you interested in learning why, in a bit more depth, this video is for you.
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CHAPTERS
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0:00 - Intro
02:53 - Lab Configuration Overview
04:24 - Scenario 1: Misconfigured NAT ACL and No Route
11:57 - Scenario 2: Fixed NAT ACL and No Route
17:20 - Scenario 3: ISP2 is Blocking Foreign Addresses on the Customer Side and No Route
22:24 - The Solution