Specifications

96
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(5)
• CSCdk75285
When a Certificate Revocation List (CRL) size is larger than 2 KB, the router might reload.
Workaround: Have the server issue a smaller CRL.
• CSCdk75500
The R2 signaling timeslots (or channels) on a Cisco AS5800 access server might lock up every two
weeks.
Workaround: Delete the CAS-group configuration item then put it back, or reload the access server.
• CSCdk76039
On a Cisco 7500 series router that uses Multilink PPP (MLPPP) and Voice over IP (VoIP), the VIP
code might consume packets too quickly and disable the VoIP MLPPP interleaving feature when
WFQ is used on RSP. This condition causes speech quality to be degraded. There is no workaround.
• CSCdk77410
The Cisco 4700 low-speed interface NP2T16S pin 24 TxCE has no signal output. This causes
problems (for example, a “line protocol is down” message) when a DCE enables
dce-terminal-timing. There is no workaround.
• CSCdk79100
When CEF switching becomes disabled due to low memory conditions, an interface’s packets
managed by CEF switching are dropped due to unresolved adjacencies. However, those managed
by process-level are successfully routed. This results in a switching degradation of about 50 percent
until CEF is reinitiated on the router.
Workaround: Reenable CEF.
• CSCdk79570
When you use a Cisco 4500 or Cisco 4700, a ping over Token Ring LANE cannot contain more than
4480 bytes. There is no workaround.
• CSCdk81331
On Cisco 7500 series routers and Cisco 12000 series routers, tag switching might not function
properly if Distributed CEF (DCEF) is enabled. This is because the tag forwarding table might not
be properly created on the VIP linecards.
Workaround: Disable DCEF using the ip cef configuration command.
• CSCdk84296
IPSec reports an incorrect MTU size. Crypto does not recognize an initial ip mtu command on an
interface to which a crypto map has been applied.
Workaround: Turn off the Don’t Fragment (DF) bit on packets going into an IPSec tunnel, then
remove the ip mtu command from the interface definition and reboot the router. After the router
has rebooted, add the ip mtu command back to the interface definition.
• CSCdk85615
On a Cisco 3640 router, there is no way to configure MICA modem lines for “dialout only.” The
modem dtr-active command fails with a “NO DIALTONE” error message. There is no
workaround.
• CSCdk91758
A Cisco 3620 router running Cisco IOS Release 11.3.(6)T might reload when you use RADIUS to
enable AAA authentication. This is not a problem with Cisco IOS Release 11.2. There is no
workaround.