Specifications

1369
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S
• CSCeb53391
Symptoms: Border Gateway Protocol (BGP) may not advertise all routes to a peer.
Conditions: This symptom is observed when the peer comes up after all other peers of an update
group have converged.
Workaround: There is no workaround.
• CSCeb53542
Symptoms: An inconsistency between the Cisco Express Forwarding (CEF) table and the Address
Resolution Protocol (ARP) table may cause CEF entries to be removed and then recreated at random
times. This situation, in turn, may cause unicast packet loss for the affected entry or entries.
Conditions: This symptom is observed on a Cisco Catalyst 6000 series that is configured with three
VLAN interfaces and that directly connect to a Layer 2 port-channel interface. This port-channel
interface connects via a trunk to an access-layer device.
When you enter the following EXEC commands on components of the Cisco Catalyst 6000 series,
the output does not show entries for the affected addresses:
– show ip cef on the Multilayer Switch Feature Card (MSFC)
– show ip cef on the Supervisor
– show ip cef on the Distributed Forwarding Card (DFC)
– show mls cef on the Supervisor
– show mls cef on the DFC
Workaround: Configuring the ARP timeout to a time on a 60-second boundary may resolve this issue
in some cases. For example, when you enter the arp timeout 270 interface configuration command,
the symptom occurs, but when you enter the arp timeout 300 interface configuration command, the
symptom does not occur.
For cases where configuring the ARP timeout to a time on a 60-second boundary does not resolve
the issue, upgrading is the only solution.
• CSCeb57086
Symptoms: A Cisco 10000 series that is configured with two Performance Routing Engine 1
(PRE-1) processors may stop functioning as a redundant system.
Conditions: This symptom is observed when you enter the bgp upgrade-cli router configuration
command.
Workaround: Reload the standby PRE-1.
• CSCeb59623
Symptoms: A Cisco router may pause indefinitely or reload when you enter the debug ip rsvp
summary-refresh privileged EXEC command and there is a large number of Resource Reservation
Protocol (RSVP) flows, for example, when Multiprotocol Label Switching (MPLS) traffic
engineering (TE) label switched paths (LSPs) are configured.
Conditions: This symptom is observed even when you have configured an access control list (ACL)
that is supposed to reduce the number of debugs to a single LSP. The symptom occurs because the
ACL does not function for some of the summary refresh debugs.
Workaround: Do not enter the debug ip rsvp summary-refresh privileged EXEC command when
a large number of flows is active.