Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Community Member

Locating Subscriber across WAN

We are interested in moving a subscriber for a CCM 5.1 across our WAN for survivabiltiy.

How much bandwidth can I expect to be used by the CCM to keep current, or how much should we have? We have a small system of less then 200 phones, that rarely changes.

Thanks,

Andy

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Locating Subscriber across WAN

Database replication between publisher uses best effort (DSCP=0). The only recommendation from cisco for the replication traffic between pub and sub is that maximum RTT of 40 ms, 20 ms in either direction.

So based on your WAN setup, you should be fine enough, check the ping results across the wan and make sure the RTT is under 40 ms.

4 REPLIES

Re: Locating Subscriber across WAN

Can you provide more details about WAN network, bandwidth, layer-2/MPLS?

Community Member

Re: Locating Subscriber across WAN

Layer 3 MPLS

2 seperate T1s from Publisher site

a Bonded 3 meg circuit at the Subscriber site

Re: Locating Subscriber across WAN

Database replication between publisher uses best effort (DSCP=0). The only recommendation from cisco for the replication traffic between pub and sub is that maximum RTT of 40 ms, 20 ms in either direction.

So based on your WAN setup, you should be fine enough, check the ping results across the wan and make sure the RTT is under 40 ms.

Community Member

Re: Locating Subscriber across WAN

Layer 3 MPLS

2 seperate T1s from Publisher site

a Bonded 3 meg circuit at the Subscriber site

111
Views
0
Helpful
4
Replies
CreatePlease to create content