Specifications

92
Release Notes for Cisco IOS Release 12.0 S
78-7130-11 Rev. B0
Caveats
IP Routing Protocols
• CSCdp18787
A Cisco router that has tag switching enabled and is running Cisco IOS Release 12.0(5)T might
reload if a tag advertisement appears in a certain time window when a related routing update takes
place. An ATM interface transition might cause this condition. There is no workaround.
• CSCdp43545
Multiprotocol Label Switching (MPLS) traffic engineering (TE) tunnels might bounce under
certain conditions if there is a very heavy traffic load on a Gigabit Switch Router (GSR) line card.
This condition has been observed when a routing loop is present and the card is generating Internet
Control Message Protocol (ICMP) “TTL expired” messages, and when the card is used as the data
sink for ICMP ECHO requests from a traffic generator. There is no workaround.
• CSCdp72309
A Cisco router that is running Cisco IOS Release 12.0(8)S might reload with a bus error at
ospf_default_networkupdate after links flap or the clear ip bgp {*} EXEC command is entered.
There is no workaround.
• CSCdp85688
When a Multicast Routing Monitor (MRM) Test Sender is instructed by an MRM Manager to send
test packets out of all interfaces that are configured for multicast routing, which is the default
option, the MRM might experience a leak in the small buffers.
Workaround: Configure the MRM Manager with the senders {access-list-number |
access-list-name} [target-only] command.
Miscellaneous
• CSCdm64005
A PA-T3 port adapter might exhibit a timing problem resulting in dropped packets. There is no
workaround.
• CSCdm75813
Writing to an AT Attachment (ATA) device might cause the device to become unusable and result
in an “ATA_Status time out waiting for 1” error message.
Workaround: Reload the Cisco IOS software.
• CSCdm94333
In APS configurations in which working and protect interfaces are in different routers, if a direct
link between the two routers fails and is replaced by an indirect IP route, then the router containing
the working interface will have no IP address for the router that is housing the protect interface.
The resulting communications failure might result in both interfaces being deselected or both
interfaces being selected. There is no workaround.
• CSCdp16749
When Turbo Access Control Lists (Turbo ACLs) are enabled when the access-list compiled
command is entered, reloading or reinstalling multiple access lists might cause a reload or an
alignment error. This condition is most likely to occur on Cisco 12000 series Gigabit Switch Router
(GSR) line cards, and usually occurs when many access list lines are being copied into the
configuration.
Workaround: Disable Turbo ACL by entering the no access-list compiled command.