Specifications

Caveats for Cisco IOS Release 12.0

78-6455-12

Resolved Caveats—Cisco IOS Release 12.0(8)

• CSCdm47892

A Cisco 7500 series router that is running the rsp-jsv40-mz (Enterprise 40) software image on

Cisco IOS Release 11.3(9.2)T might experience a bus error. A stack trace decode reveals the

following:

0x40262B9C:__start(0x60010000)+0xe0252b9c

0x60093B08:tr_bcast(0x60093af8)+0x10

0x60250630:rsp_tx_start(0x60250258)+0x3d8

0x601DA4D4:datagram_out(0x601d9d5c)+0x778

0x6070FC70:llc_wput(0x6070ec6c)+0x1004

0x60925134:CLSSapUDataStnReq(0x60924fec)+0x148

0x60921858:CLSSapHandleMsg(0x60921710)+0x148

0x6091EA10:CLSDluSendToSap(0x6091e948)+0xc8

0x60925B38:CLSWritePut(0x60925a74)+0xc4

There is no workaround.

• CSCdm60927

A Bridge-Group Virtual Interface (BVI) might become wedged intermittently (approximately

monthly).

Workaround: Create a new BVI.

• CSCdm77025

Running Link Access Procedure, Balanced (LAPB) under a heavy traffic load might cause frames

to get lost within the router, which results in REJECTS, backup of output queue, and output drops.

There is no workaround.

• CSCdm79792

A Cisco router might reload immediately after you enable STAC compression. This condition

occurs with High-Level Data Link Control (HDLC) encapsulation when FastPath packets or

particles are present in the output queues when compression is enabled.

Workaround: Enter the no ip route-cache interface configuration command before enabling

compression, or perform a shutdown on the line before enabling compression.

• CSCdp11141

A Cisco router that is running Cisco IOS Release 12.0 might not reply to an Address Resolution

Protocol (ARP) request if the Ethernet port is set for bridging and is in blocking mode. There is no

workaround.

• CSCdp12182

Integrated Local Management Interface (ILMI) might not come up if you are using a PA-A3 port

adapter and running Cisco IOS Release 12.0(6.5) or later. There is no workaround.

• CSCdp23738

Uneven numbered interfaces (that is, SerX/1 and SerX/3) on a PA-4E1 (75/120) four-port serial

card might not work properly on Cisco 7200 series and Route/Switch Processor (RSP) routers. The

following Cisco IOS releases are affected, including later release versions: Cisco IOS

Release 12.0(6.5); Cisco IOS Release 12.0(6.5)T; Cisco IOS Release 12.0(6.5)S; Cisco IOS

Release 12.0(6.5)PI01; Cisco IOS Release 11.1(29)CC, and Cisco IOS Release 12.0(6.6)SC01.

Workaround: There is no workaround.