Specifications

87
Release Notes for Cisco 7000 Family for Cisco IOS Release 12.1 T
78-10811-05
New and Changed Information
solution for multicast applications with basic reliability requirements. PGM has two main parts: a host
element (also referred to as the transport layer of the PGM protocol) and a network element (also
referred to as the network layer of the PGM protocol).
The transport layer of the PGM protocol consists of two main parts: a source part and a receiver part.
The transport layer defines how multicast applications send and receive reliable, ordered, duplicate-free
multicast data from multiple sources to multiple receivers. The PGM Host feature is the Cisco
implementation of the transport layer of the PGM protocol.
The network layer of the PGM protocol defines how intermediate network devices (such as routers and
switches) handle PGM transport data as the data flows through a network. The PGM Router Assist
feature is the Cisco implementation of the network layer of the PGM protocol. Refer to the
“IP Multicast” section of the Cisco IOS IP and IP Routing Configuration Guide for information about
the PGM Router Assist feature.
Service Assurance Agent Enhancement
Platforms: Cisco 7200 series and Cisco 7500 series routers
The Service Assurance (SA) Agent is both an enhancement to and a new name for the Response Time
Reporter (RTR) feature that was introduced in Cisco IOS release 11.2. Using this feature you can
monitor network performance between a Cisco router and a remote device (which can be another Cisco
router, an IP host, or a mainframe host, by measuring key Service Level Agreement (SLA) metrics such
as response time, network resources, availability, jitter, connect time, packet loss, and application
performance). You can perform troubleshooting, problem analysis, and notification based on the
statistics collected by the SA Agent.
The SA Agent Enhancement feature introduces new performance measurement operations and
enhancements to assist in the measurement of SLAs. With Cisco IOS release 12.1(1)T, the SA Agent
provides new capabilities so that you can:
• Measure FTP file download response time using the new FTP operation
• Monitor one-way latency reporting through enhancements to the Jitter operation
• Configure a new option for the DHCP operation
• Manually enable a responder port
• Verify data for the UDPEcho operation
• Configure new options for the rtr schedule command
• Restart an operation
SSH Version 1 Support for T Train
Platforms: Cisco 7100 series, Cisco 7200 series, and Cisco 7500 series routers
Secure Shell (SSH) is a protocol that provides a secure, remote connection to a router. There are
currently two versions of SSH available, SSH Version 1 and SSH Version 2. Only SSH Version 1 is
implemented in Cisco IOS.
The SSH server feature enables an SSH client to make a secure, encrypted connection to a Cisco router.
This connection provides functionality that is similar to an inbound Telnet connection. The SSH server
in Cisco IOS works with publicly and commercially available SSH clients.