Specifications

Release Notes for Cisco IOS Release 12.0 S

78-7130-11 Rev. B0

Caveats

session. The console is inoperative until the old primary GRP has rebooted, at which time the vty

connection is reestablished. The effect is similar to an attach session being started. A symptom of

this situation is that the prompt has the form “GRP-Slot#”.

Workaround: After a failover, type exit to leave the unwanted session with the other GRP. This

action should return the console to a normal state. This action will only work if the failed GRP has

rebooted to become the secondary GRP. If the failed GRP does not reboot, the serial console will

effectively remain locked. To recover from this, use Telnet to log in to the router and enter the clear

line 0 command. To prevent this situation from occurring again, avoid any use of the console on

the secondary GRP.

• CSCdr29594

A Cisco 7500 series route switch processor (RSP) with ATM interfaces might pause indefinitely

under the the following conditions:

–

A microcode reload

–

A change in the maximum transmission unit (MTU)

–

A change in the encapsulation

Workaround: A possible workaround is to put all the ATM interfaces in admin down state during

the above operations.

• CSCdr33450

DML-PPP does not function properly on a VIP4-80 Versatile Interface Processor. The VIP4 will

reload, and the controller will be in a shutdown state. There is no workaround.

• CSCdr34945

The Cisco 12000 series gigabit switch router (GSR) is unable to switch packets from an ingress line

card interface to the section data communication channel (SDCC) that is communicating with a

Cisco Optical Regenerator. In this situation, the Cisco Optical Regenerator might display the

following error message:

Illegal HDLC serial type code 60, PC=0x801410C4

The Cisco Optical Regenerator can only be managed from the E0 interface of the gigabit switch

router (GSR). There is no workaround.

• CSCdr40080

A Cisco 12000 series gigabit switch router might reload with a bus error at

PC 0x600D3ED4, address 0x1B2DC330. There is no workaround.

• CSCdr40808

On Performance OC-48, QOC-12, and 16-port OC-3 line cards, the Time To Live (TTL) value is

not propagated correctly on receipt of a Multiprotocol Label Switching (MPLS) packet with a label

stack of more than one label when performing a label swap or a label pop operation. There is no

workaround.

• CSCdr42456

If you attempt to set a class queue limit by entering the fair-queue [qos-group|tos] value limit

value command, the limit command does not function properly, and the queue limit will always

remain at the default value. There is no workaround.