Licensing The Oc-3 And Oc-12 Interface Modules; Multichassis Lacp; Pseudowire Group Switchover - Cisco ASR 900 Series Release Notes

New Software Features in Cisco IOS XE Release 3.10S

Licensing the OC-3 and OC-12 Interface Modules

The optical modules 4-Port OC3/STM-1 or 1-Port OC12/STM-4 delivers four active ports of OC-3
interface module (IM) or Synchronous Transport Module level 1 (STM-1) connectivity, or one active
port of OC-12 IM or STM-4 connectivity, on the Cisco ASR 903 Router. Licensing is applicable to these
ports on the interface modules.
The benefits of licensing these ports are:
•
•
•
•
Table 6-1
Table 6-1
License Type
1 OC3 port license
1 OC12 port license
For more information see,
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

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).
The Pseudowire Group Switchover feature is enabled by default and cannot be disabled.
Note
For more information, see
Release
Cisco IOS XE 3S Release Notes for the Cisco ASR 903 Router
6
Facilitate the pay-as-you-grow model to enhance the ports by purchasing licenses as required.
Provide the ability to shift license from one port to another.
Provide the ability to release a license when the interface module is removed from a slot and reinstall
the license when inserted again.
Support for high availability and OIR of interface modules.
lists the license supported on the OC-3 and OC-12 interface modules.
OC-3 and OC-12 Port Licenses
Description
Single OC3/STM-1 port STM-1 on OC-3 port
Single OC12/STM-4
port
Licensing the OC-3 and OC-12 Interface Modules on the Cisco ASR 903
Multichassis
Cisco ASR 903 Router Chassis Software Configuration Guide, IOS XE
3.10S.
Usability
STM-1 on OC-3 port
LACP.
Chapter
OL-26630-12