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Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(32)S
Workaround: Enter the mpls ip command on a TE tunnel interface or temporarily on a physical
interface to force LDP to be re-established.
• CSCsb05218
Symptoms: An IPv6 ACL configuration may be lost or incorrect after an SSO switchover.
Conditions: This symptom is observed when a Cisco 12000 series performs IPv6 ACL filtering and
when the ACL is modified.
Workaround: There is no workaround.
• CSCsb06383
Symptoms: When a high rate of multicast and unicast bi-directional traffic is sent into multiple
access ports across an SRP uplink interface, the PXF engine may restart unexpectedly. Functionality
is restored automatically.
Conditions: This symptom is observed on a Cisco 10720 that processes a high rate of multicast and
unicast traffic.
Workaround: There is no workaround but the recovery is automatic.
• CSCsb09190
Symptoms: A router misses an entry in its label forwarding table, which is shown in the output of
the show tag-switching forwarding-table EXEC command for the missing entry and in the output
of the show ip cef detail EXEC command for the prefix.
Conditions: This symptom is observed on a Cisco router that is configured for Multiprotocol Label
Switching (MPLS) and that learns its routes through iBGP from redundant route reflectors (RRs)
when BGP labeling is not enabled.
Workaround: There is no workaround. However, when you enter the clear ip route EXEC command
for the affected prefix, the prefix is reinstalled in the label forwarding table.
• CSCsb11124
The Cisco IOS Stack Group Bidding Protocol (SGBP) feature in certain versions of Cisco IOS
software is vulnerable to a remotely-exploitable denial of service condition. Devices that do not
support or have not enabled the SGBP protocol are not affected by this vulnerability.
Cisco has made free software available to address this vulnerability for affected customers. There
are workarounds available to mitigate the effects of the vulnerability.
Cisco has published a Security Advisory on this issue; it is available at
http://www.cisco.com/warp/public/707/cisco-sa-20060118-sgbp.shtml
• CSCsb11568
Symptoms: On a 6PE router, an IPv6 ACL that is configured on an egress interface that faces a CE
router does not filter any traffic.
Conditions: This symptom is observed on a Cisco 12000 series that is configured for 6PE when the
egress interface is an interface of a line card that cannot process packets in its hardware, for example,
an Engine 0 or Engine 2 line card.
Workaround: There is no workaround.
• CSCsb11574
Symptoms: After a Cisco 12000 series is rebooted, the interfaces that are associated with a 6-port
channelized T3 (T1) line card may not come up.
Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS
Release 12.0(31)S.
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