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The Flexible Media Routing feature supports the call legs in which media and signaling are sent over different virtual or physical networks. The signaling network is configured using the vrf command in the adjacency submode. All the call legs to and from an adjacency use the same VPN ID for signaling. The media network is configured using the vrf parameter in the media-address command.
When the Flexible Media Routing feature is enabled, the media address selection overrides the
VPN ID-based selection. Therefore, the media VPN ID is no longer compared with the signaling VPN ID. Instead, the SBC selects the media address whose realm matches the adjacency realm. The IPv6 and H.323 protocols support the Flexible Media Routing feature.
Cisco Unified Border Element (SP Edition) was formerly known as Integrated Session Border Controller and may be commonly referred to as the session border controller (SBC) in this document.
For a complete description of the commands used in this chapter, refer to the Cisco Unified Border Element (SP Edition) Command Reference: Unified Model at:
http://www.cisco.com/en/US/docs/ios/sbc/command/reference/sbcu_book.html
For information about all Cisco IOS commands, use the Command Lookup Tool at http://tools.cisco.com/Support/CLILookup or a Cisco IOS master commands list.
Feature History for Flexible Media Routing
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The Flexible Media Routing feature was introduced on the Cisco ASR 1000 Series Aggregation Services Routers. |
The following prerequisite is required to configure the Flexible Media Routing feature:
Ensure that the SBC is deactivated before configuring the Flexible Media Routing feature.
This task shows how to configure the Flexible Media Routing feature.
The following example shows the SBC behavior when the Flexible Media Routing feature is configured:
The following example shows how to configure different VRFs under the signaling and media networks.
After the Flexible Media Routing feature is enabled, the SBC adds the mediarealm attribute to the adjacency element in the XML billing records as follows: