02-09-2024 08:55 AM
Hello, in my central structure, there are 2 routers on which I apply hsrp, and I set up a Gre tunnel between the router in the backup center and the active router in the center, and the 2 routers talk to each other. There are static routes on each router to access the vlans behind the routers. My configurations are as follows;
Active Router-Main
interface Tunnel20
ip address 192.168.80.1 255.255.255.224
ip mtu 1400
ip tcp adjust-mss 1360
tunnel source GigabitEthernet0/0/7
tunnel destination 10.82.46.20
backup router
interface Tunnel20
ip address 192.168.80.2 255.255.255.224
ip mtu 1400
ip tcp adjust-mss 1360
tunnel source GigabitEthernet0/0/2
tunnel destination 10.82.46.56
Active router static route;192.168.20.0(backup vlan side) 255.255.255.0 192.168.80.2
Backup Router static route:192.168.10.0(main vlan side) 255.255.255.0 192.168.80.1,
My hsrp configurations are correct and both routers use the same interfaces. I want the traffic to pass to the passive router if the active router is down. I will create a new tunnel between the passive router and the router in the backup center, that's for sure, but what kind of static route should I write for the passive router and the backup router? Does this work?
02-09-2024 09:46 AM
where is your HSRP Configuration, can you show how your high level network diagram looks like ?
you looking tunnel failover you can do different methods or tracking the interfaces or using any IGP so on..
02-09-2024 10:56 AM
Hello,
if you need to use static routes, you could simply configure routes that track IP SLAs...
02-09-2024 12:41 PM
BTW, for ordinary GRE, you only need to allow for 24 bytes overhead.
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