Specifications
44
Release Notes for Cisco IOS Release 12.0 S
78-7130-11 Rev. B0
New and Changed Information
Secure Shell Version 1
Platforms: Cisco 7200 series, Cisco 7500/RSP series, Cisco 12000 series
Secure Shell (SSH) is a protocol that provides a secure, remote connection to a router. Two versions of
SSH are available, SSH Version 1 and SSH Version 2. Only SSH Version 1 is implemented in Cisco IOS
software.
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 will work with publicly and commercially available SSH clients.
Before SSH, security was limited to Telnet security. SSH allows strong encryption to be used with
Cisco IOS authentication.
Tag Switching
Platforms: Cisco 7200 series, Cisco 7500/RSP series, Cisco 12000 series
Tag switching is a novel approach to network layer packet forwarding. The two main components of the
tag switching architecture are forwarding and control. Forwarding is accomplished using simple
label-swapping techniques, while the existing network layer routing protocols plus mechanisms for
binding and distributing tags are used for control. Tag switching can retain the scaling properties of IP
and can help improve the scalability of IP networks.
Important Notes
Important Notes for Cisco IOS Release 12.0(13)S
Cisco 7500/RSP Series Images Deferred
Four images were deferred in Cisco IOS Release 12.0(13)S due to severe defects. The following images
are affected:
• rsp-boot-mz
• rsp-pv-mz
• rsp-k3pv-mz
• rsp-k4pv-mz
The following defects caused the deferral of these images:
• CSCds58988—Nested r4k_return_to_monitor calls, 75xx will not boot (HSA)
• CSCds49677—3xGE - GRP-3-ENCAP:Failure to allocate, slot X (info 0x22)
• CSCds17084—MQC:change q-limit then remove the policy would cause RSP crash
• CSCds50637—changes in GSR ACL config may reduce performance
• CSCds30549—sh ip bgp summ shows incorrect number of received prefixes
• CSCds61573—ATMOC3-LC stops packet forwarding from 3PortGigE w/egress CAR cnfg
• CSCdr47814—ifTable ATM0/0.0 subinterface shows up w/o any pvcs configured
• CSCds62557—VIP4-50 performance