Cisco Cisco IOS Software Release 12.2 릴리즈 노트
366
Caveats for Cisco IOS Release 12.2
OL-3513-16 Rev. G0
Resolved Caveats—Cisco IOS Release 12.2(12h); IP Routing Protocols
IP Routing Protocols
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CSCea43167
Symptoms: In a large Border Gateway Protocol (BGP) Open Shortest Path First (OSPF)
environment, the OSPF neighbors may go down when the BGP link flaps and a large number of BGP
routes are flushed out of the route table or are repopulated.
environment, the OSPF neighbors may go down when the BGP link flaps and a large number of BGP
routes are flushed out of the route table or are repopulated.
Conditions: The conditions under which this symptom occurs seem to depend upon when the BGP
configuration is applied to the router. There is no OSPF neighbor drop if the router reloads without
the BGP configuration and BGP is added after the router reloads. However, the router drops OSPF
neighbors when a BGP link flaps if BGP is already configured before the router is reloaded.
configuration is applied to the router. There is no OSPF neighbor drop if the router reloads without
the BGP configuration and BGP is added after the router reloads. However, the router drops OSPF
neighbors when a BGP link flaps if BGP is already configured before the router is reloaded.
Workaround: There is no workaround.
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CSCeb85136
Symptoms: An IP packet that is sent with an invalid IP checksum may not be dropped.
Conditions: This symptom is observed if the IP checksum is calculated with a decreased time-to-live
(TTL) value. For example, in the situation where the IP checksum must be 0x1134 with a TTL of 3,
if the packet is sent with an IP checksum of 0x1234 that is calculated by using a TTL value of 2, the
packet is not dropped. In all other cases, packets with incorrect checksums are dropped.
(TTL) value. For example, in the situation where the IP checksum must be 0x1134 with a TTL of 3,
if the packet is sent with an IP checksum of 0x1234 that is calculated by using a TTL value of 2, the
packet is not dropped. In all other cases, packets with incorrect checksums are dropped.
Workaround: There is no workaround.
Miscellaneous
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CSCdv01994
Symptoms: Memory allocation failures (MALLOCFAIL) may be observed on a router after it is
reloaded.
reloaded.
Conditions: This symptom is observed on a Cisco 7500 series router.
Workaround: There is no workaround.
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CSCdx65248
Symptoms: Cisco Express Forwarding (CEF) may be disabled on a line card after a memory leak
occurs.
occurs.
Conditions: This symptom is observed on a line card.
Workaround: There is no workaround.
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CSCdy17399
Symptoms: Internal Border Gateway Protocol (iBGP) load balancing does not function correctly on
a Route Processor Module (RPM-PR) line card.
a Route Processor Module (RPM-PR) line card.
Conditions: This symptom is observed when the iBGP unequal-cost multipath load-balancing
feature is enabled on a Multiprotocol Label Switching (MPLS) Virtual Private Network (VPN).
feature is enabled on a Multiprotocol Label Switching (MPLS) Virtual Private Network (VPN).
Workaround: There is no workaround.
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CSCea84387
Symptoms: A user session may pause indefinitely, causing a Cisco router to become unresponsive.
Conditions: This symptom is observed when multiple simultaneous users enter modular QoS CLI
(MQC) commands on the same router via separate vty sessions.
(MQC) commands on the same router via separate vty sessions.
Workaround: Allow only one user at a time to enter MQC commands.