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Multiple Routes - How to use as Failover

 
Linkk
Frequent Advisor

Re: Mulitple Routes - How to use as Failover


@16again wrote:

Maybe it works like this:
If the radio link goes down, the ethernet port where it's connected (or the VLAN) will stay up!!
Although 10.0.0.2 is no longer reachable, there still is a connected route for 10.0.0.0/24 , and the switch/router/hosts attached will keep ARP-ing for 10.0.0.2.   Only if 10.0.0.1 interface goes down, the connected 10.0.0.0/24 route disappears, and backup VPN route will become active


Why don't you let your firewall route? Most enterprise firewalls I work with have the possibility to "probe" the other site and detect that the link is down, even if the interface is up. 

I don't know that the switch can do that. 

Another possibility would be to use f.e. OSPF, that detects the neighbour failure. But that only works through Layer 2 connections, so the backup VPN needs to be bridged to the switch.