Cisco ASR 900 Series

CHAPTER 7
Circuit Emulation Service over UDP
This chapter is not applicable on the ASR 900 RSP3 Module for the Cisco IOS XE Release 3.16.Note
The Circuit Emulation Service over UDP (CEMoUDP) feature extends the implementation of Cisco IOS
Circuit Emulation Service (CES) by supporting pseudowire emulation (PWE) function to be performed over
an Internet Protocol (IP) network directly.
As part of CEMoUDP, both Circuit Emulation Service over Packet-Switched Network (CESoPSN) and
Structure-agnostic TDM over Packet (SAToP) are supported. CESoPSN is supported
CEMoUDP is supported on 8T1/E1 interface module, 16T1/E1 interface module, 32T1/E1, and OC3 interface
module on the router.
•
Finding Feature Information, page 125
•
Restrictions for Circuit Emulation Service over UDP, page 125
•
Information About Circuit Emulation Service over UDP, page 126
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and
feature information, see Bug Search Tool and the release notes for your platform and software release. To
find information about the features documented in this module, and to see a list of the releases in which each
feature is supported, see the feature information table.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support.
To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Restrictions for Circuit Emulation Service over UDP
•
Because CLI on Route Processor (RP) is used to install the Access Control List (ACL) entry, the ACL
programming is decoupled from the Layer 2 virtual private network (L2VPN) control plane update. As
a result, when a pseudowire circuit goes down, the ACL is still present. Any traffic coming in from the
MPLS Basic Configuration Guide, Cisco IOS XE Everest 16.5.1 (Cisco ASR 900 Series)
125