Thanks for posting your question on the forum! You are definitely on the right track with your failover configuration. However, there are a couple of suggestions that I would like to make:
1. The weighted route statement should actually point to the next-hop across the T1. In this case, that IP address should be the WAN IP address of the T1 interface at Site B. For example, let's say that that Site A's T1 WAN IP is 192.168.1.1 and Site B's T1 WAN IP is 192.168.1.2, the route statements would like like this:
ip route 0.0.0.0 0.0.0.0 10.0.0.254 track Internet_Track
ip route 0.0.0.0 0.0.0.0 192.168.2.1 100
2. You will need to add a route-map to your configuration. This route map will ensure that the ping probe is continuously testing Site A's internet connection even when internet is failed over. This will allow the internet to fail back over once Site A's internet connection is re-established. Without the route-map, the router will begin to flap between the 2 connections. Below are instructions and an example of how to set up the route-map.
- Create an access list to match the ICMP traffic being sent from the probe.
Syntax: ip access-list extended <list name>
EX: (config)# ip access-list extended pingprobe
Syntax: permit icmp any <destination IP of probe>
EX: (config-ext-nacl)# permit icmp any 220.127.116.11
- Create a route-map to force the ICMP traffic out of the primary interface.
This will be critical because if the probe fails over along with the rest of the traffic, it will pass and the failover will be negated.
Syntax: route-map <map name> permit <sequence number>
EX: (config)# route-map ICMP permit 10
Syntax: match ip address <ACL name>
EX: (config-route-map)# match IP address pingprobe
Syntax: set ip next-hop <default gateway of primary interface>
EX: (config-route-map)# set ip next-hop 18.104.22.168
- Assign the route map globally to the router.
This will force all traffic generated by the router that matches the ACL out of the primary interface.
Syntax: ip local policy route-map <route map name>
EX: (config)# ip local policy route-map ICMP
Further details on how to set up redundancy using network monitoring can be found in this guide: Configuring WAN Failover with Network Monitor in AOS
Please do not hesitate to let us know if you have any further questions.
Many thanks! It makes a lot more sense now. I greatly appreciate your assistance.