Specifications

1288
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S4
Workaround: There is no workaround.
• CSCef94619
Symptoms: A VIP may crash while forwarding packets or a watchdog timeout crash may occur on
the VIP during statistics collection.
Conditions: This symptom is observed on a Cisco 7500 series that is configured with an RSP4 and
that runs Cisco IOS Release 12.0(26)S4.
Workaround: There is no workaround.
• CSCef96652
Symptoms: The offered rate counter in the output of the show policy-map interface command is
inaccurate.
Conditions: This symptom is observed on a Cisco 12000 series when very high traffic rates are used.
Workaround: There is no workaround.
• CSCef97536
Symptoms: When Multiprotocol Label Switching (MPLS) label distribution protocol (LDP) is
configured and you enter the clear ip route EXEC command, the MPLS forwarding entries for some
of the cleared routing prefixes may become unlabeled.
Conditions: This symptom is observed for prefixes that are connected (with an unspecified nexthop
IP address) and that are not locally recognized. This situation may occur in a configuration in which
two LDP peers are connected by a point-to-point link that uses PPP encapsulation, and in which both
interfaces are configured to use IP addresses with /32 masks.
A list of the affected releases can be found at
http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCee12379. Cisco IOS
software releases that are not listed in the “First Fixed-in Version” field at this location are not
affected.
Possible Workaround: Prevent the symptom from occurring by using a shorter network mask when
you configure the interfaces or by using another encapsulation such as HDLC.
When the symptom occurs, restore proper operation by forcing the LDP session that is associated
with the link to re-establish itself, or by forcing the LDP session to re-advertise labels for the
affected prefixes. The LDP session can be reset by entering the clear mpls ldp neighbor command,
by administratively disabling and then re-enabling one of the interfaces, or by deconfiguring and
then reconfiguring LDP on one of the interfaces. The LDP session can be forced to re-advertise
labels by modifying the outbound label filtering configuration. However, this method is complicated
and should only be attempted if you are already very familiar with the required procedures, and if
the routers do not already have a complicated label filtering configuration in place.
• CSCef97964
Symptoms: A VIP4-80 crashes when you enter the redundancy force-switchover command.
Conditions: This symptom is observed on a Cisco 7513 that runs Cisco IOS Release 12.0(28)S1 and
that is configured for SSO.
Workaround: There is no workaround.
• CSCeg00111
Symptoms: Padded IP fragments with an IP length that is shorter than 64 bytes and the More
Fragments (MF) (which is set to 1) are dropped by an Engine 4+ line card that functions as an egress
line card.