I have a scenario where by there are a couple of headOffice routers running mGRE to multiple spokes running GRE. Each of the HeadOffice router is connected to a firewall and then onto its internet links (at different HOffice locations)
Is there a way where we can turn the mGRE interface go up/down based on a ping response from a public IP address. The idea is to have the GRE spokes route the internet traffic out the other tunnel interface that terminates on the second HeadOffice router's mGRE tunnel.
So, just to rephrase it, the failover mechanism of internet (outbound) traffic will be based on the status of the GRE tunnel interface.
Any quick response would be greatly appreciated.