Cisco CUBE setup configuration

Does Cisco CUBE pair need to have IP Addresses in 2 different subnets from MPLS CE Routers? We have a pair of CEs connecting to the Cisco CUBE for the voice. Please clarify.

Thanks;
totaramAsked:
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lrmooreCommented:
Ideally you would have separate interfaces for SIP and for Private network. I always request that the provider hand me 2 interfaces. SIP usually has a public IP address, and the WAN/MPLS to other sites will have the private IP addressing. SIP is almost always to a public IP address, so that is why I do it this way.
I have had providers hand me a VLAN sub-interface so that I can use sub-interfaces on the CUBE.
With a pair of CUBES, you can connect them both to the same port using HSRP for the interfaces.
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totaramAuthor Commented:
Thank you so much for your comments.. please clarify that HSRP is possible with CUBEs for resiliency?

thanks again for good explanation,
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lrmooreCommented:
Yes, you can use HSRP on the provider-facing interfaces. This allows for just one sip target IP for inbound calls and provides full redundancy.
An alternative is to have a separate ip address on each one and the provider can set up primary and secondary paths.
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totaramAuthor Commented:
Hi lrmoore;
For the second option, will both the legs be in live/live loadsharing or primary/failover mode?
Customer is interested in live/live if possible.
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totaramAuthor Commented:
Hi lrmoore;
Any comments?
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lrmooreCommented:
Live/live will require separate ip addresses on each cube and Telco can put them in a hunt group. Outbound is a challenge to load share, depending on your phone system
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totaramAuthor Commented:
lrmoore;
Is it advisable to go for primary / backup scenario with HSRP

then ?
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lrmooreCommented:
Most likely if the telco is only handing off 1 physical interface
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totaramAuthor Commented:
Thanks..
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