Specifications

1389
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S
When the symptom occurs, the output of the show hardware pxf cpu subblocks privileged EXEC
command lists “noSB” for the affected subinterface, as is indicated in the following example:
Router# show hard pxf cpu sub | i GigabitEthernet4
GigabitEthernet4/0/0 up 12000 4 PXF 1 81C4A800 4
GigabitEthernet4/0/0.500 administ 12000 4 PXF 1 81C4A800 noSB
Workaround: Change the encapsulation of the subinterface to dot1q when the subinterface is not
shut down. The state of the main interface is irrelevant. After you change the encapsulation, you can
shut down the subinterface again.
When the subinterface is created while the main interface is shut down, the subinterface and the
VLAN do not function properly. Perform the following steps to recover the VLAN:
1. Ensure that the subinterface is not shut down.
2. (Optional) Enter the no encapsulation dot1q native subinterface configuration command.
3. Remove the subinterface.
4. Recreate the subinterface.
5. Change the encapsulation back to dot1q.
• CSCeb76341
Symptoms: A label may not be assigned for a peer provider edge (PE) router.
Conditions: This symptom is observed on a Cisco 7500 series and a Cisco 12000 series in a Virtual
Private Network (VPN) configuration with multiple route reflectors (RRs) and label controlled ATM
(LC-ATM) links between PE routers. The symptom may also occur on other platforms.
Workaround: There is no workaround.
• CSCeb76642
Symptoms: A Cisco router may reload when you enter the show ip cef non-recursive detail EXEC
command.
Conditions: This symptom is observed when any show command attempts to display information
about tag rewrite entries while the tag rewrite entries are being deleted by route updates.
Workaround: Do not enter any show command to display tag rewrite entries when many route
updates occur.
• CSCeb77493
Symptoms: When Layer 2 Tunneling Protocol version 3 (L2TPv3) is configured, a significant
degradation in performance may occur.
Conditions: This symptom is observed on a Cisco 7200 series and Cisco 7500 series that run
Cisco IOS Release 12.0 S.
Workaround: There is no workaround.
• CSCeb78329
Symptoms: After a Route Processor Redundancy Plus (RPR+) switchover occurs, the deletion of an
existing permanent virtual circuit (PVC)/permanent virtual path (PVP) fails. This situation prevents
you from recreating the same PVC/PVP. You can create a new PVC/PVP, but once you delete it, you
cannot recreate it because the PVC remains in the active state.
Conditions: This symptom is observed on a Cisco 10000 series that runs Cisco IOS Release 12.0 S
or Release 12.0 SX.
Workaround: There is no workaround. To enable the router to return to normal operation, reload the
router.