Cisco ASR 903 Release Notes

6
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
For more information see, Licensing the OC-3 and OC-12 Interface Modules on the Cisco ASR 903
Router.
Multichassis LACP
Cisco's Multichassis EtherChannel (MCEC) solution addresses the need for interchassis redundancy
mechanisms, where a carrier wants to "dual home" a device to two upstream points of attachment (PoAs)
for redundancy. Some carriers either cannot or will not run loop prevention control protocols in their
access networks, making an alternative redundancy scheme necessary. MCEC addresses this issue with
enhancements to the 802.3ad Link Aggregation Control Protocol (LACP) implementation. These
enhancements are provided in the Multichassis LACP (mLACP) feature.
For more information, see Multichassis LACP.
Pseudowire Group Switchover
Currently, pseudowire switchovers to the backup pseudowires occur one by one from IOS to platform
dataplane and can take up to four seconds for 1000 pseudowires. The group switchover feature reduces
this switchover time by efficiently grouping status messages in both Label Distribution Protocol (LDP)
and internal Inter-Process Communications (IPCs).
Note The Pseudowire Group Switchover feature is enabled by default and cannot be disabled.
For more information, see Cisco ASR 903 Router Chassis Software Configuration Guide, IOS XE
Release 3.10S.
Raw Socket
Raw Socket Transport is a method for transporting serial data through an IP network. Raw Socket
transports Supervisory Control and Data Acquisition (SCADA) data from Remote Terminal Units
(RTUs). This method is an alternative to the Block Serial Tunnel (BSTUN) protocol. Raw Socket
supports point-to-point and point-to-multipoint connections. For instructions on how to configure Raw
Socket, see Configuring Raw Socket Transport on the Cisco ASR 903 Router.
Raw Socket is supported on the serial interface module. For instructions on how to install the serial
interface module, see the Cisco ASR 903 Hardware Installation Guide.
For information on how to configure the serial interface module, see Configuring Raw Socket Transport
on the Cisco ASR 903 Router.
Table 6-1 OC-3 and OC-12 Port Licenses
License Type Description Usability
1 OC3 port license Single OC3/STM-1 port STM-1 on OC-3 port
1 OC12 port license Single OC12/STM-4
port
STM-1 on OC-3 port

Cisco ASR 903 Specifications

General

Brand	Cisco
Model	ASR 903
Category	Network Router
Language	English