Specifications

Caveats for Cisco IOS Release 12.0

78-6455-12

Resolved Caveats—Cisco IOS Release 12.0(8)

EXEC and Configuration Parser

• CSCdk64574

A Cisco AS5800 access server might reload with a bus error after an ASCII login.

Workaround: Upgrade to one of the following Cisco IOS releases: Cisco IOS Release 12.0(7) and

later releases, Cisco IOS Release 12.0(7)T, Cisco IOS Release 11.3(10.6)AA, or Cisco IOS

Release 12.0(7)S and later releases.

• CSCdp21558

Performing NVGEN (that is, entering the show running-config command or entering the

write memory command) might result in reloads for Cisco 2500, 2600, and 4000 series routers and

spurious memory access in Cisco 3600 and 7200 series routers. You will not be able to see the

running configuration. There is no workaround.

IBM Connectivity

• CSCdm71810

Removing serial tunneling (STUN) statements from a serial interface and global interface causes a

Cisco 7513 router to reload with a bus error.

Workaround: Shut down the synchronous data link control (SDLC) interface before removing the

STUN statement.

• CSCdm89688

A Cisco 7000 series router with two CIP cards that are both running the tn3270-server interface

configuration command might unexpectedly reload with a software forced crash if you remove the

client ip configuration command. There is no workaround.

• CSCdm89739

If you are configuring a Cisco 2600 series router by entering the fras ban interface configuration

command with the fras ddr-backup interface configuration command, the backup is driven if the

primary interface goes down. When the backup interface goes down, the backup enabled by the

fras ddr-backup interface configuration command switches to the main interface. But if the

backup interface goes down and the main interface goes up, the sessions are not recovering, and

fras ddr-backup tries the backup interface even though the backup interface is in a down state.

Workaround: Disable fras ddr-backup on the main interface by entering the no fras ddr-backup

interface configuration command.

• CSCdm91465

A Cisco 2500 router might exhibit the following error message on a Binary Synchronous

Communications Protocol (bisync) interface:

LINK-2-INTVULN

There is no workaround.

• CSCdp03857

A Cisco 4000 router or a Cisco 2500 router that is running Cisco IOS Release 12.0(6.5) and

data-link switching (DLSw) will not be compatible with other platforms. This condition does not

affect other platforms that are running DLSw. There is no workaround.