Cisco ASR 903 Release Notes

7
Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
OL-26630-08
Chapter
New Software Features in Cisco IOS XE Release 3.10S
Note We recommend the installation of the Metro IP Services and Metro Aggregation Services licenses with
serial interface module. For more information about obtaining and installing licenses, see Software
Licensing Overview.
Hardware Limitations
Serial Interface Module Limitations—The following limitations apply to the serial interface module:
• A maximum of 2 serial interface modules are supported on the Cisco ASR 903 Router.
• The serial interface module hardware supports a 230.4 Kbps traffic rate in asynchronous mode. The
actual speed is dependent on cable quality and length. The serial interface module hardware supports
an 8 Mbps traffic rate in synchronous mode. The actual speed is dependent on cable quality and
length.
Software Limitations
Raw Socket limitations—The following software limitations apply to the serial interface module:
• Raw Socket encapsulation is supported on up to 28 serial ports.
• Asynchronous EIA/TIA-232 serial traffic is supported with DB-25, DB-9, and RJ-45 connectors.
• The X.21, V.35, RS-485, EIA-449, EIA-530, and IRIG-B standards are not currently supported by
software.
• Synchronous traffic is not currently supported.
Remote LFA FRR Protection for TDM and ATM Pseudowires
Starting with Cisco IOS XE Release 3.10S, the Loop-Free Alternate (LFA) Fast Reroute (FRR) feature
is supported for Time-division multiplexing (TDM) pseudowires.
• Circuit Emulation Service over Packet Switched Network (CESoPSN) over MPLS, and
Structure-Agnostic Time Division Multiplexing over Packet (SAToP) over MPLS networks for T1,
E1, SDH and SONET framing is supported.
• Inverse Multiplexing over ATM (IMA) over MPLS; PVC and PVC sessions are supported for the
ATM (IMA).
For more information see, Configuring Loop-Free Alternate Fast Reroute on the Cisco ASR 903 Router.
Remote LFA FRR and Labeled BGP PIC FRR Integration
Starting with Cisco IOS XE Release 3.10S, Both the Labeled Border Gateway Protocol (BGP)
Prefix-Independent Convergence (PIC) feature and the Loop-Free Alternate (LFA) Fast Reroute (FRR)
feature can be configured together on the Cisco ASR 903 router.
For more information see, Configuring Loop-Free Alternate Fast Reroute on the Cisco ASR 903 Router.

Cisco ASR 903 Specifications

General

Brand	Cisco
Model	ASR 903
Category	Network Router
Language	English