Release Notes for the Cisco SM-X-1T3/E3 T3/E3 Enhanced Service Module

Table Of Contents

Release Notes for the Cisco SM-X-1T3/E3 T3/E3 Enhanced Service Module

Overview

System Requirements

Open Caveats

Open Caveats—Cisco IOS XE Release 3.9.1S/IOS Release 15.3(2)S1

Related Documentation

Obtaining Documentation and Submitting a Service Request

Release Notes for the Cisco SM-X-1T3/E3 T3/E3 Enhanced Service Module

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June 24, 2013

Part Number: OL-29866-01

Overview

The Cisco SM-X-1T3/E3 1-port T3/E3 enhanced service module (SM-X) is a software-configurable T3/E3 product for Second Generation Integrated Services Routers (ISR G2) and the Cisco 4451-X Integrated Services Router. This flexible enhanced service module enables you to switch between T3 and E3 applications with a single Cisco IOS command.

The SM-X-1T3/E3 enhanced service module supports a single-port T3 or E3 with an integrated channel service unit (CSU) and a data service unit (DSU). It supports High-Level Data Link Control (HDLC), PPP, and Frame Relay.

The SM-X-1T3/E3 includes the following features:

•Single port—universal T3/E3 version

•Clear and subrate support in both T3 and E3 modes

•Online insertion and removal (OIR) support

•Onboard processing of Cisco Message Definition Language (MDL) and performance monitoring

•Support for scrambling and subrate can be independently or simultaneously enabled in each DSU mode

•Support for full T3 and E3 line rates

•Support for RFC1407-MIB

System Requirements

Cisco ISR G2 Routers

To operate the Cisco SM-X-1T3/E3 module on Cisco ISR G2 routers, use one of the following Cisco IOS releases:

•15.2(4)M4 or later

•15.3(1)T2 or later

•15.3(2)T1 later

Cisco ISR 4451-X Routers

To operate the Cisco SM-X-1T3/E3 module on Cisco ISR 4451-X routers, Cisco IOS XE Release 3.9.1 or later release is required.

Open Caveats

This section describes the open caveats. In this section, the following information is provided for each caveat:

•Symptom—A description of what is observed when the caveat occurs.

•Conditions—The conditions under which the caveat has been known to occur.

•Workaround—Solutions, if available, to counteract the caveat.

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Tip If you have an account on Cisco.com, you can also use the Bug Toolkit to find select caveats of any severity. To access the Bug Toolkit, log in to Cisco.com and go to http://www.cisco.com/pcgi-bin/Support/Bugtool/launch_bugtool.pl.

If the defect that you have requested cannot be displayed, this may be due to one or more of the following reasons: the defect number does not exist, the defect does not have a customer-visible description yet, or the defect has been marked Cisco Confidential.)

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Open Caveats—Cisco IOS XE Release 3.9.1S/IOS Release 15.3(2)S1

This section documents the unexpected behavior that may be seen with the Cisco SM-X-1T3/E3 T3/E3 Enhanced Service Module with Cisco IOS XE Release 3.9.1S/IOS Release 15.3(2)S1.

CSCug69970

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Note This caveat is applicable only to Cisco ISR 4451-X routers.

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Symptom:

High priority packet queue 2 (HP2) traffic becomes throttled when congested by high priority packet queue 1 (HP1), causing high latency for large packets.

Conditions:

This can occur when the ratio of HP2:HP1 traffic is approximately 50%:60% of line rate, meaning that the line is oversubscribed, attempting to handle more than the line rate.

Workaround:

Reduce the traffic to less than or equal to the line rate.

Related Documentation

Connecting Cisco T3 and E3 Service Modules to the Network

Cisco SM-X-1T3/E3 Enhanced Service Module Configuration Guide

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Subscribe to the What's New in Cisco Product Documentation as an RSS feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service. Cisco currently supports RSS Version 2.0.

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This document is to be used in conjunction with the documents listed in the "Related Documentation" section.

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Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

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