Specifications

104

Release Notes for Cisco IOS Release 12.0 S

78-7130-11 Rev. B0

Caveats

Miscellaneous

• CSCdm09656

After you load the image on a Cisco 7500 series router that is running Cisco IOS Release 12.0 S

and Release 12.0 T, issuing the no shutdown command on a T1 controller that is up causes the T1

controller to go down. Channels created under that controller also go down. This only happens with

T1 and does not occur on Cisco 7200 series routers.

Workaround: Issue the shutdown command followed by the no shutdown command on the T1

controller. If this fails, perform a microcode reload to bring the controller back up.

• CSCdm12259

The rate limit on a Gigabit Switch Router (GSR) might not work properly if input Committed

Access Rate (CAR) based on QoS groups is configured. There is no workaround.

• CSCdm66427

If you use the “log” keyword in an Access Control List (ACL) that is used to filter routes, it might

result in alignment errors that cause increased CPU utilization and interfere with normal router

operation.

Workaround: Remove the “log” keyword from the configuration.

Wide-Area Networking

• CSCdm49871

A Cisco router reloads when you deconfigure a routing protocol (for example, when you issue the

no ipx routing command). The problem exists in Cisco IOS Release 12.0(3)T and

Release 12.0(3)S and later releases. At least one Frame Relay interface must be configured and at

least one Frame Relay map (an association between a DLCI and a level 3 protocol address) must

be established by Inverse ARP.

Workaround:

(a) Disable Inverse ARP for the routing protocol to be deconfigured (for example, for IPX

routing, use the no frame-relay inverse-arp ipx dlci interface configuration command).

(b) Clear the Frame Relay Inverse ARP cache using the clear frame-relay-inarp executive

command.

no ipx routing global configuration command).