Примечания к выпуску для Cisco Cisco IOS Software Release 12.4(2)XB6

General Packet Radio Service (GPRS)

Evolution-Data Optimized (EVDO)

1 times Radio Transmission Technology (1xRTT)

Automatic best network selection

Multiple external antenna options

Static and dynamic IP addressing

Modem-based support for mobile IP

Cellular interface based on the async interface in Cisco IOS

NAT support

Security features like Firewall, IDS/IPS and IPSec VPN on the router

WAN switchover using IOS backup interface feature

There are no new software features in this release.

For information regarding the features supported in Cisco IOS Release 12.4T, see the Cross-Platform 
Release Notes and New Feature Documentation links at the following location on 

There are no known limitations or restrictions.

Caveats describe unexpected behavior or defects in the Cisco IOS software releases. Severity 1 caveats 
are the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the 
least serious of these three severity levels.

Caveats in Cisco IOS Release 12.4(11)T are also in Release 12.4(11)XV. For information on caveats in 
Cisco IOS Release 12.4(11)T, refer to the 

document. This 

document lists severity 1 and 2 caveats; the documents are located on 

If you have an account with 

, you can also use the Bug Toolkit to find select caveats of any 

severity. To reach the Bug Toolkit, log in to 

 and go to: 

This section contains the following caveat information: