Specifications

Caveats for Cisco IOS Release 12.0

78-6455-12

Miscellaneous

• CSCdk58757

A Cisco router running Cisco IOS Release 12.0 and its branches reloads when a permanent virtual

circuit (PVC) has more than one IP address associated with it. If one of the IP addresses is removed,

an inarp command process is started. But if the PVC itself is removed the router will reload. There

is no workaround.

• CSCdk68700

Encryption over dialer profiles may cause a Cisco router to reload when fast switching is enabled.

This situation results in a “get alignment fatal” error.

Workaround: Disable fast switching on the dialer profile interfaces.

• CSCdr67651

When removing a Hot Standby Router Protocol (HSRP) secondary address from an HSRP group,

the primary HSRP address of that group will be removed from the Address Resolution Protocol

(ARP) table, and the router will not respond to ARP requests for the HSRP primary address. This

situation will lead to loss of connectivity for hosts that have not yet cached the HSRP MAC address.

Workaround: Issue the clear arp-cache EXEC command on the interface after the HSRP address

has been removed.

• CSCdr67801

A Cisco 7200 series router or a Cisco 7500/RSP series router with a PA-A3 ATM port adapter may

reload because of a bus error that points to an 0x50000000 address or an 0x08000000 address.

These reloads occur after the PA-A3 driver has received a packet and attempts to process it.

Workaround: Disable Cisco Express Forwarding (CEF) by entering the no ip cef global

configuration command on the Cisco 7200 series router or by entering the no ip cef global

configuration command on the Cisco 7500/RSP series router.

Protocol Translation

• CSCdr76882

When you use the vty-async global configuration command on a Cisco router that is running

Cisco IOS Release 12.0(11) with a virtual template, the second call is not established, but the third

call works. There is no workaround.

Wide-Area Networking

• CSCdp66267

A Cisco 4500 series router reloads with a bus error in nov_fastswitch. There is no workaround.

• CSCdr54259

A router experiences a software-forced reload with a bus error every 5 to 10 minutes after the

broadcast trigger command is enabled on a map list associated with an active Frame Relay

switched virtual circuit (SVC).

Workaround: Do not enter the class command under the map-list global configuration command.