Specifications

1370
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S
• CSCeb60432
Symptoms: If an object in a Resource Reservation Protocol (RSVP) reservation (RESV) refresh
changes in relation to the previous refresh, a debug message may be generated that is not subjected
to an access control list (ACL). When many flows or label switched paths (LSPs) are active on a
router, this situation may cause so much debug output that the router may pause indefinitely or
reload.
Conditions: This symptom is observed in Cisco IOS Release 12.0(25)S when the debug ip rsvp
filter privileged EXEC command is configured to reduce the number of debugs on a subset of RSVP
flows or Multiprotocol Label Switching (MPLS) traffic engineering LSPs and when you also
configure the debug ip rsvp resv privileged EXEC command. The ACL that is enabled with the
filter keyword of the debug ip rsvp filter privileged EXEC command may not function for one
debug message.
Workaround: Do not configure the debug ip rsvp resv privileged EXEC command when there are
many flows on the router.
• CSCeb63120
Symptoms: When refresh reduction is enabled and a Cisco router has been operational for a long
time, valid Resource Reservation Protocol (RSVP) messages that are received from a neighbor may
be dropped when the message IDs have cycled through the entire number space once (that is, from
0 to 4,294,967,295) and then progressed up to 2,147,483,648 (0x80000000).
Conditions: This symptom is observed when a message ID number space begins at zero, increases
up to 4,294,967,295 (32 bits), but then does not properly wrap back to zero, causing message IDs
greater than 2,147,483,648 to be out of sequence, and to be dropped.
Note that a neighboring router is able to send Message IDs and properly wraps back from
4,294,967,295 to zero, but the receiving router that does not record the wrap event, causing the
symptom to occur.
Workaround: There is no workaround.
• CSCeb68925
Symptoms: Enabling IP version 6 (IPv6) multicast routing by entering the ipv6 multicast-routing
global configuration command may cause memory corruption. This situation may eventually cause
the router to reload.
Conditions: This symptom is observed on a Cisco 7200 series but may also occur on other platforms.
Workaround: There is no workaround.
• CSCeb69295
Symptoms: A redistributed static route may not be advertised to any Border Gateway Protocol
(BGP) peer, even though the route is selected as the best path in the BGP table.
Conditions: This symptom is observed when the MPLS VPN Carrier Supporting Carrier IPv4 BGP
Label Distribution feature is enabled and when the IP version 4 (IPv4) address family is missing
from the running configuration.
Workaround: There is no workaround.
• CSCeb77038
Symptoms: A Cisco router may pause indefinitely because of a bus error, and the following error
message may appear:
System returned to ROM by bus error at PC 0x60B5F1C0, address 0xEF4321E5
Conditions: This symptom is observed on a Multiprotocol Label Switching (MPLS) provider edge
(PE) router.