Specifications

74
Release Notes for Cisco 7000 Family for Cisco IOS Release 12.1 T
78-10811-05
New and Changed Information
RSVP provides admission control. However, to provide the bandwidth and delay guarantees for voice
traffic and get admission control, RSVP must work with LLQ. The RSVP support for LLQ feature
allows RSVP to classify voice flows and queue them into the priority queue within the LLQ system
while simultaneously providing reservations for nonvoice flows by getting a reserved queue.
Secure Shell, Version 1 Integrated Client
Platforms: Cisco 7200 series and Cisco 7500 series routers
Secure Shell (SSH) is a protocol that provides a secure, remote connection to another 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 Secure Shell, Version 1 Integrated Client feature is an application that runs on a reliable transport
layer, such as TCP/IP, and provides strong authentication and encryption. The SSH client enables a
Cisco router to make a secure, encrypted connection to another Cisco router or device running an SSH,
Version 1 server. This connection provides functionality that is similar to an outbound Telnet
connection except that the connection is encrypted. With authentication and encryption, the SSH client
provides a secure communication over an insecure network.
The SSH client in Cisco IOS works with publicly and commercially available SSH servers.The SSH
client supports DES (56-bit) and Triple DES (168-bit) encryption using random number generation.
The SSH client also supports user ID and password authentication using standard authentication
methods: local authentication, RADIUS, and TACACS+.
The SSH, Version 1 Integrated Client feature uses the RSA algorithm to generate key pairs for
authentication.
SNMP Support for IOS vLAN Subinterfaces
Platforms: Cisco 7200 series and Cisco 7500 series routers
The SNMP support for IOS vLAN Subinterfaces feature provides MIB-2 interfaces sparse table support
for Fast Ethernet subinterfaces. This enhancement is similar to the functionality supported in Frame
Relay subinterfaces.
Sparse table support for the interfaces table on Fast Ethernet subinterfaces provides customers
accustomed to Frame Relay subinterfaces the same functionality.
Source Specific Multicast
Platforms: Cisco 7200 series and Cisco 7500 series routers
The Source Specific Multicast (SSM) feature is an extension of IP multicast, where datagram traffic is
forwarded to receivers from only those multicast sources to which the receivers have explicitly joined.
When SSM is used, only source-specific multicast distribution trees (no shared trees) are created.
Source specific multicast (SSM) is a datagram delivery model that best supports one-to-many
applications, also known as broadcast applications. SSM is the core networking technology for the
implementation of Cisco solutions targeted for audio and video broadcast application environments.