We have Observed high traffic between one gateway to another gateway connected through a MPLS .
here is the brief overview of the setup,
1. We are using a two VG's located in siteA ,this environment also has cucm cluster with a publisher and two subscribers.close to 35 IPC's used.
2. There is another VG located in siteB , where around 8 IPC's are used.
3. Both the Site A and Site B are connected through a separate MPLS link.
SiteA VG's ------>wan interface site A------->------MPLS------->----------wan interface Site B--------->Site B VG
(source IP) (Destination IP)
if call lands in VG of site A,it is treated through CUCM from Site A and if all the phones are in use then call transfered to IPCommunicators in Site B through wan interface
if call lands in VG of site B,it is treated through CUCM from site A and the transfered to IP communicators in Site B through wan interface.
High traffic between VG's from Site A to Site B.?
There should be no traffic flow from VG of site A to VG of site B
Found them to be UDP through packet capture in the Site B 's wan interface.