I have to configure L3 redundancy between a 3825 MGCP Gateway which also is the SRST Gateway and a L3 LAN at the distribution layer.
The customer wants to use OSPF. Ok I need 2 different /30 subnets on the 3825 interfaces plus a loop-back interface with a /32 network all advertised by OSPF.
For MGCP I can bind control and media flows to the loop-back.
For SRST I can configure the loop-back interface addresse as source of SRST.
Does anyone use such a configuration ?
Is it supported by Cisco ?
Usually I use bridging with irb and a bvi interface but my customer does not want to rely on Spanning-Tree.
Sure. You can bind MGCP control/media to loopback. You can configure SRST to use the loopback. if you have conference/transcoding/etc. media resources, you can bind SCCP to loopback. You can also bind the H323 call processing to the loopback if you had a need to allow your SRST device to communicate with another router.
All of this is supported by Cisco and I use it on every deployment I work on because redundancy is important
I assume from your post that you know how to bind the call control and media channels to your loopback.
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