Cisco Cisco IOS Software Release 12.0 S Release Notes
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Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(23)S3
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CSCdw82270
Symptoms: When the default-information originate router configuration command
is entered on a
Cisco 12000 series via the Border Gateway Protocol (BGP), the default route is learned correctly
but is entered incorrectly into the BGP routing table. This behavior may cause the Cisco 12000
series to have operating issues with other routers because the Cisco 12000 series does not have a
correct default route.
but is entered incorrectly into the BGP routing table. This behavior may cause the Cisco 12000
series to have operating issues with other routers because the Cisco 12000 series does not have a
correct default route.
Conditions: This symptom is observed on a Cisco 12000 series.
Workaround: Perform either of the following steps:
–
Enter a static default route.
–
Configure an access control list (ACL) to prevent packets from being propagated from the
incorrect default route.
incorrect default route.
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CSCdz09296
Symptoms: Transit traffic that uses Open Shortest Path First (OSPF) routes may be briefly
interrupted after consecutive switch-over. This affects only OSPF configurations with
message-digest authentication.
interrupted after consecutive switch-over. This affects only OSPF configurations with
message-digest authentication.
Conditions: This symptom is observed on Cisco routers that are running Cisco IOS
Release 12.0(22)S when the following conditions are present:
Release 12.0(22)S when the following conditions are present:
The message-digest authentication is configured for OSPF.
More than one Route Processor (RP) switchover occurs within minutes of each other.
Workaround: There is no workaround. Traffic resumes without user intervention. To prevent future
traffic interruptions on subsequent switchovers, disable the message-digest authentication for OSPF.
traffic interruptions on subsequent switchovers, disable the message-digest authentication for OSPF.
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CSCdz10505
Symptoms: When a neighbor under virtual route forwarding (VRF) is configured using the bgp
graceful-restart router configuration command, the session does not begin. A notification
regarding wrong OPEN message is generated.
graceful-restart router configuration command, the session does not begin. A notification
regarding wrong OPEN message is generated.
Conditions: This symptom is observed only when the router is configured using the bgp
graceful-restart router configuration command.
graceful-restart router configuration command.
Workaround: There is no workaround.
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CSCdz24314
Symptoms: A Border Gateway Protocol (BGP) session reset occurs because of a notification that
indicates a defective OPEN message.
indicates a defective OPEN message.
Conditions: This symptom is observed when using the both option in the following command in
router configuration mode:
router configuration mode:
neighbor ip-address [capability] orf prefix-filter [receive | send | both]
Workaround: Configure only the receive or send options of the neighbor-orf prefix-filter router
configuration command.
configuration command.
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CSCea13075
Symptoms: The Multi Exit Discriminator (MED) that is received from a confederation external peer
may be ignored in best path selection. The output of the show ip bgp longer-prefixes EXEC
command does not indicate that any MED values were received.
may be ignored in best path selection. The output of the show ip bgp longer-prefixes EXEC
command does not indicate that any MED values were received.
Conditions: This symptom is observed when Multiprotocol Label Switching (MPLS) Virtual Private
Network (VPN) configurations are present.
Network (VPN) configurations are present.
Workaround: There is no workaround.