Specifications

Caveats for Cisco IOS Release 12.0

78-6455-12

Resolved Caveats—Cisco IOS Release 12.0(11)

All the caveats listed in this section are resolved in Cisco IOS Release 12.0(11). This section describes

severity 1 and 2 caveats and select severity 3 caveats.

Basic System Services

• CSCdp08710

A Cisco 7200 series router with a compression service adapter (CSA) that is configured with Frame

Relay Traffic Shaping (FRTS), and using either Cisco Express Forwarding (CEF) or fast switching

will not compress data when the amount of data on the interface is greater than the shaping value.

(For example, CSA will stop compression when traffic shaping becomes active.)

Workaround: Use process switching.

• CSCdp96893

A Cisco 7500 series router that is configured with a High-Speed Serial Interface (HSSI) port

adapter will experience a Virtual Interface Processor (VIP) reload when distributed software

compression or hardware compression is configured. When you update the image, the bootloader

also needs to be updated, or router will experience the same reload at boot time.

Workaround: Disable compression or use software compression.

• CSCdr02938

The Block Serial Tunneling (BSTUN) character set ASCII mode on a Cisco 1600 serial interface

does not interoperate with some Binary Synchronous Communication Protocol (Bisync)

implementations. Bisync will reject frames that have trailing packet assembler/disassembler (PAD)

(0x7F) characters. There is no workaround.

• CSCdr18978

Number expansion does not work properly. There is no workaround.

IBM Connectivity

• CSCdp60118

A Cisco router might reload in Tfind_next call because of corrupted memory. There is no

workaround.

• CSCdp87156

If you reload the head router on a Block Serial Tunneling (BSTUN) network, the BSTUN state

might stay open on the head router but close on the remote router.

Workaround: Enter the no bstun route command followed by the bstun route command to open

the tunnel on both sides.

• CSCdp97116

A Cisco 7500 series router might reload with a bus error at PEfree_ips. There is no workaround.

• CSCdr04949

A Cisco router might reload when it runs out of processor memory.

Workaround: Turn off High Performance Routing (HPR).