Specifications

Caveats for Cisco IOS Release 12.0

78-6455-12

Resolved Caveats—Cisco IOS Release 12.0(5)

• CSCdk92265

If online insertion and removal (OIR) is performed on a DMM card, autoselect fails. There is no

workaround.

• CSCdk93438

A VIP controller on a Cisco 7500 series router might hang when encryption is used. This condition

is intermittent.

Workaround: Reload the router.

• CSCdk93483

If voice traffic is process-switched (for example, when using RTP Header Compression), the

execution of certain EXEC commands on the router (for example, the

show running-configuration command), can have an adverse effect on the quality of voice calls

during the execution of the command when it is competing with voice packets for CPU time. There

is no workaround.

• CSCdm01005

Committed Access Rate (CAR) fails to forward traffic when fragmentation is required and fast

switching is in use.

Workaround: Disable fast switching.

• CSCdm03148

If you have a Cisco 7513 router with up to six channelized T3 cards, with many serial interfaces,

and you have recently upgraded from Cisco IOS Release 11.1(21)CC2 to Release 11.1(23)CC, the

copy run start command might take longer to execute, and performance problems might occur

with the router. SNMP responses can be noticeably slowed, and serial lines can see a line protocol

drop. This condition occurs when DCEF is enabled globally, but disabled on the VIP2 interfaces.

Workaround: Remove CEF from the router, or remove CEF distributed and apply IP CEF. You can

also enable DCEF.

• CSCdm04449

OAM TX might be dropped.

Workaround: Use a release of Cisco IOS software that is older than the following releases:

Cisco IOS Release 11.3(05)DB0.3, Cisco IOS Release 11.3(06.06)DB0, Cisco IOS

Release 12.0(2.4), Cisco IOS Release 11.3(7.2)AA, Cisco IOS Release 12.0(2.4)T, Cisco IOS

Release 12.0(2.5)S, Cisco IOS Release 11.1(23.02)CC, Cisco IOS Release 12.0(2.5)PI, or

Cisco IOS Release 12.0(02.05).

• CSCdm06832

A Cisco 1700 series router might inadvertently reload with SegV exception. There is no

workaround.

• CSCdm07890

A relay IP address is not correctly completed when you configure DHCP proxy under virtual

templates. There is no workaround.

• CSCdm08139

If Cisco a router runs Cisco IOS Release 11.3(8)T1 56-bit Encryption, and is configured to run

IPSec over Frame Relay, a point-to-point interface fails. The packets from the source IP address are

dropped when the router configured for IPSec. There is no workaround.