Cisco ASR 907 User Manual

Figure 24: CEM and iMSG Interface Module
The ASR 900 Combo 8-Port SFP GE and 1-Port 10GE With CEM/iMSG, 20G IM supports eight SFP optical
interfaces supporting at OC-3/OC-12/OC-48/1G rates and a single SFP+ optical interface supporting at
OC-192/10G.
This IM operates in two modes:
• 20G mode; uses two XFI lanes towards the system
• 10G mode; uses single XFI lane towards the system
The benefits of this IM are:
• Improves backplane efficiency
• Increases system capacity
• Increases client flexibility
The most important feature of the ASR 900 Combo 8-Port SFP GE and 1-Port 10GE With CEM/iMSG, 20G
IM is it provides more flexibility from the interface, which allows you to configure any interface speed on
the OCn port irrespective of the IM bandwidth. The bandwidth restriction comes into effect only when the
circuit is configured.
For example, you can configure the SFP+ port as an OC-192 and the other eight optical ports as OC-48 to
have the total interface speed of 30G. However, if you configure only one STS-1 HO CEP on each port that
will take only 9xSTS-1, which is equivalent to 500 Mbps (9 x 52Mbps x1.06) of the backplane traffic.
Restrictions
• On the port capable of OC-192 speed, lower speed such as, OC-3, OC-12, or OC-48 are not supported.
• Separate licenses are required for every OC-3, OC-12 ports, OC-48, and OC-192 ports.
Cisco ASR 907 Router Hardware Installation Guide
28
Cisco ASR 907 Router Overview
Restrictions

Cisco ASR 907 Specifications

General

Brand	Cisco
Model	ASR 907
Category	Network Router
Language	English