Cisco ASR 900 Series User Manual

SB=Standby HS=Hot Standby RV=Recovering NH=No Hardware
XC ST Segment 1 S1 Segment 2 S2
------+---------------------------------+--+---------------------------------+--
UP ac CE3/0/0:1(CESoPSN Basic) UP udp 66.66.66.66:180 UP
UP ac CE3/0/0:6(CESoPSN Basic) UP udp 66.66.66.66:181 UP
Router# show pw-udp vc
Local intf Local circuit VC ID Status
-------------- -------------------------- ---------- --------
CE3/0/0 CESoPSN Basic 180 established
LAddr: 55.55.55.55 LPort: 50002
RAddr: 66.66.66.66 RPort: 50002
CE3/0/0 CESoPSN Basic 181 established
LAddr: 55.55.55.55 LPort: 50004
RAddr: 66.66.66.66 RPort: 50004
Structure-Agnostic TDM over Packet over UDP
Structure-Agnostic TDM over Packet (SAToP) encapsulates time division multiplexing (TDM) bit-streams
(T1, E1, T3, E3) as PWs over public switched networks. It disregards any structure that may be imposed on
streams, in particular the structure imposed by the standard TDM framing.
The protocol used for emulation of these services does not depend on the method in which attachment circuits
are delivered to the provider edge (PE) devices. For example, a T1 attachment circuit is treated the same way
for all delivery methods, including copper, multiplex in a T3 circuit, a virtual tributary of a SONET/SDH
circuit, or unstructured Circuit Emulation Service (CES).
In SAToP mode the interface is considered as a continuous framed bit stream. The packetization of the stream
is done according to IETF RFC 4553. All signaling is carried out transparently as a part of a bit stream. The
following figure shows the frame format in Unstructured SAToP mode.
Figure 13: Unstructured SAToP Mode Frame Format
The following table shows the payload and jitter limits for the T1 lines in the SAToP frame format.
Minimum
Jitter
Maximum JitterMinimum PayloadMinimum JitterMaximum JitterMaximum
Payload
26419210320960
The following table shows the payload and jitter limits for the E1 lines in the SAToP frame format.
Minimum
Jitter
Maximum JitterMinimum PayloadMinimum JitterMaximum JitterMaximum
Payload
264256103201280
MPLS Basic Configuration Guide, Cisco IOS XE Everest 16.5.1 (Cisco ASR 900 Series)
132
Circuit Emulation Service over UDP
Structure-Agnostic TDM over Packet over UDP

Cisco ASR 900 Series Specifications

General

Brand	Cisco
Model	ASR 900 Series
Category	Network Router
Language	English