User guide

Release Notes for Cisco IOS Release 12.4T

OL-8012-09 Rev. B0

Platform-Specific Information

Feature Support

For feature support in Cisco IOS Release 12.4T, see the “Feature Support” section on page 7.

Additional Notes for the Cisco 3600 Series Routers

This section contains important information about using the Cisco 3600 series routers with Cisco IOS

Release 12.4T software.

CLI Command Added

The following command-line interface (CLI) command was added to Cisco IOS Release 12.2(2)T and is

available in later versions:

This command replaces the ip precedence 0-7 VoIP dial-peer command. It implements RFC 2474,

which specifies bits 0 to 5 of the IP ToS byte as the differentiated services code point (DSCP), with

acceptable values ranging from 0 to 63. Traffic is treated in a unique manner according to the value of

the DSCP. The expected treatment of this marked traffic is defined as a per-hop behavior (PHB).

RFC 2474 also defines a set of PHBs to forward traffic at least as well as expected with the IP precedence

bits (bits 0 to 2) of the old ToS byte marked. The DSCP values for these precedence-compatible

WAN Interface Cards 1-Port ADSL WAN interface card (WIC) Cisco 3660 only

1-port T1/fractional T1/DSU/CSU WIC (WIC-1DSU-T1) Cisco 3660 only

1-port T1/fractional T1 56/64-kbps DSU/CSU WIC

(WIC-1DSU-56K4)

Cisco 3631 and Cisco 3660

1-port ISDN with NT-1 WIC (BRI WIC)

Cisco 3631 and Cisco 3660

1-port ISDN WIC (WIC-1B-S/T) Cisco 3631 and Cisco 3660

1-port serial WIC (WIC-1T) Cisco 3660 only

2-port serial (WIC-2T[=])

Cisco 3631 and Cisco 3660

2-port asynchronous/synchronous (WIC-2A/S[=]) Cisco 3631 and Cisco 3660

Content Engine

Network Modules

NM-CE-BP-20G-K9, Content Engine NM-Basic Perf-20GB Cisco 3660 only

NM-CE-BP-40G-K9, Content Engine NM-Basic Perf-40GB Cisco 3660 only

NM-CE-BP-SCSI-K9, Content Engine NM-Basic Perf-SCSI Cisco 3660 only

1. The NM-1FE-FX network module is end of life. A replacement part, the NM-1FE-FX-V2, will be supported along with the NM-1FE-FX.

2. Requires the Cisco IOS Plus feature sets.

3. For the Cisco 3660 series only, online insertion and removal (OIR) is supported in Cisco IOS Release 12.4.

4. See T1/E1 multiflex voice/WAN interface cards in this table.

5. For the Cisco 3660 series, only supported in T1/E1 digital packet voice trunk network modules and new Fast Ethernet mixed media network modules:

NM-1FE2W, NM-2FE2W, NM-1FE1R2W, NM-2W.

6. The BRI WIC replaces the WIC-1B-U in Cisco IOS Release 12.3.

7. Supported in Fast Ethernet mixed media network modules: NM-1FE2W, NM-2FE2W, NM-1FE1R2W, NM-2W.

Table 4 Supported Interfaces for the Cisco 3600 Series Routers (Continued)

Interface, Network

Module, or Data Rate Product Description Supported Platforms