Specifications

57
Release Notes for Cisco 7000 Family for Cisco IOS Release 12.1 T
78-10811-05
New and Changed Information
NAT—Support of IP Phone to Cisco Call Manager
Platforms: Cisco 7200 series and Cisco 7500 series routers
Cisco IP Phones use the Selsius Skinny Station Protocol to connect with and register to the Cisco Call
Manager (CCM). Messages flow back and forth that include IP address and Port information which is
used to identify other IP Phone users with which a call can be placed.
To be able to deploy Cisco IOS Network Address Translation (NAT) between the IP Phone and CCM in
a scalable environment, NAT needs to be able to detect the Selsius Skinny Station Protocol and
understand the information passed within the messages.
When an IP Phone attempts to connect to the CCM and it matches the configured NAT translation rules,
NAT will translate the original source IP address and replace it with one from the configured pool. This
new address is what will be reflected in the CCM and be visible to other IP Phone users.
NAT—Support for NetMeeting Directory (Internet Locator Service—ILS)
Platforms: Cisco 7100 series, Cisco 7200 series, and Cisco 7500 series routers
Microsoft NetMeeting is a Windows-based application that enables multi-user interaction and
collaboration from a users PC over the Internet or an intranet. Support for the NetMeeting Directory
(ILS) allows connections by name from the directory built into the NetMeeting application. Destination
IP addresses do not need to be known in order for a connection to be made.
Network-Based Application Recognition
Platforms: Cisco 7100 series and Cisco 7200 series routers
Network-Based Application Recognition (NBAR) is a classification engine that recognizes a wide
variety of applications, including Web-based and other difficult-to-classify protocols that utilize
dynamic TCP/UDP port assignments. When an application is recognized and classified by NBAR, a
network can invoke services for that specific application. NBAR ensures that network bandwidth is used
efficiently by working with QoS features to provide bandwidth guarantees and limits, traffic shaping,
and packet marking.
NBAR introduces several new classification features:
• Classification of applications which dynamically assign TCP/UDP port numbers
• Classification of HTTP traffic by URL, HOST, or MIME type
• Classification of Citrix ICA traffic by application name
• Classification of application traffic using subport information
NBAR can also classify static port protocols. Although Access Control Lists (ACLs) can also be used
for this purpose, NBAR is easier to configure and can provide classification statistics that are not
available when using ACLs.
NBAR provides a special Protocol Discovery feature that determines which application protocols are
traversing a network at any given time. The Protocol Discovery feature captures key statistics associated
with each protocol in a network. These statistics can be used to define traffic classes and QoS policies
for each traffic class.
For additional information on NBAR, see the Network-Based Application Recognition feature module
on Cisco.com and the Documentation CD-ROM.