Side A / Side B가 따로 떨어져 있을 경우

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/icm_enterprise/icm_enterprise_11_5_1/Installation/Guide/ucce_b_staging-guide/ucce_b_staging-guide_chapter_01001.html

 

Set Persistent Static Routes

For geographically distributed Central Controller sites, redundant CallRouter, Logger, and Peripheral Gateway components typically have a Private IP WAN connection between Side A and Side B. Windows only allows one default gateway for each VM (which sends the Private Network traffic to the Public Network). So, you add a Static Route to all the VMs running the CallRouter, Logger, and PG applications.

To create a persistent static route with the route add command, you need the destination subnet, the subnet mask, the local gateway IP, and the interface number of the local Private Network interface:

route add <destination subnet> mask <subnet mask> <gateway IP> IF <interface number> -p

You must launch the DOS prompt as an administrator to run the commands in this procedure.

Procedure

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Step 1	On each CallRouter, Logger, or PG VM, run ipconfig /all. Record the IPv4 Address, Subnet Mask, and Physical Address (MAC address) for the Private Network interface.
Step 2	On each of these VMs, run route print –4. Record the Interface for the Private Network. You can identify the correct interface by looking for its Physical Address (MAC address).
Step 3	On each of these VMs, run route add <destination subnet> mask <subnet mask> <gateway IP> IF <interface number> -p to add a persistent static route for the remote Private Network.

따로 떨어져 있을 경우 Route Add 반드시 해야한다.