Loopback0 vs. "Backup interface GigabitEthernetx/x" for redundance
I am a voice engineer. To configure MGCP gateways I have used the Cisco standard method of creating a loopback interface specially when there are redundant switch connections, e.g. GigabitEthernet0/0 and GigabitEthernet0/0. Can anybody please explain if I use "backup interface" method, would it work same way. The backup interface method also has a backup delay, not sure what is default, but secondary interface won't be active until the delay elapses. If I configure "no backup delay" would there still be an event for MGCP? Can somebody please share their experience?
If your primary interface fails, is there an event for MGCP? What happens to active calls?
Update: I just found that the default delay is 0 seconds (that means "no backup delay" is not required to be explicitly added, so I assume the MGCP gateway should not experience any impact at all. If you done this testing in your environment, please confirm.
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