Cisco Cisco IOS Software Release 12.4(23)
832
Caveats for Cisco IOS Release 12.4
OL-7656-15 Rev. J0
Resolved Caveats—Cisco IOS Release 12.4(3)
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CSCeh16989
Symptoms: The Multiprotocol BGP (MP-BGP) network entries counter increases above the real
number of reachable networks.
number of reachable networks.
Conditions: This symptom is observed when network activity occurs in a non-converged
environment. The correct number of network entries is restored when there is a period of BGP
stability that last for about 1 minute or more because BGP is able to converge and the scanner has
time to run and collect the old network entries. However, if there is a sustained period of churn and
BGP is only able to converge for a few seconds before new updates arrive, old BGP network entries
are not cleaned up, causing the MP-BGP network entries counter to increase above the real number
of reachable networks.
environment. The correct number of network entries is restored when there is a period of BGP
stability that last for about 1 minute or more because BGP is able to converge and the scanner has
time to run and collect the old network entries. However, if there is a sustained period of churn and
BGP is only able to converge for a few seconds before new updates arrive, old BGP network entries
are not cleaned up, causing the MP-BGP network entries counter to increase above the real number
of reachable networks.
Workaround: There is no workaround.
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CSCeh33504
Symptoms: A router terminates 102,000 VPNv4 routes but route reflectors (RRs) report only a a
subset of the total.
subset of the total.
Conditions: This symptom is observed on a Cisco MGX RPM-XF that runs Cisco IOS
Release 12.3(11)T4 when 204 routes are configured per VRF over 496 VPNs (one VPN has about
1000 routes). However, Cisco MGX RPM-PRs that function as RRs show that only 76245 routes are
terminated on the Cisco MGX RPM-XF. The symptom may be platform-independent.
Release 12.3(11)T4 when 204 routes are configured per VRF over 496 VPNs (one VPN has about
1000 routes). However, Cisco MGX RPM-PRs that function as RRs show that only 76245 routes are
terminated on the Cisco MGX RPM-XF. The symptom may be platform-independent.
Workaround: There is no workaround.
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CSCeh35246
Symptoms: A router may crash when a subinterface on which OSPF is running is deleted.
Conditions This symptom is observed when the mpls ldp sync command is configured under OSPF.
Workaround: There is no workaround.
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CSCeh37200
Symptoms: A router crashes when PIM is enabled on a VIF interface.
Conditions: This symptom is observed on a Cisco 7500 series but may be platform-independent.
Workaround: There is no workaround.
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CSCeh47172
Symptoms: Deny statements for an expanded list in the ip extcommunity-list command are ignored.
Both named and numbered expanded extended community access lists are impacted.
Both named and numbered expanded extended community access lists are impacted.
Conditions: This symptom is observed on a Cisco 7304 that is configured with an NSE-100 but is
platform-independent.
platform-independent.
Workaround: Configure a route map, split complex extended community access lists in different
simpler extended community access lists, and use permit statements and deny route-map statements.
simpler extended community access lists, and use permit statements and deny route-map statements.
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CSCeh47763
Symptoms: A Cisco router may erroneously send ACK packets in response to RST packets for
non-local TCP sessions. This can cause high CPU utilization on the router.
non-local TCP sessions. This can cause high CPU utilization on the router.
Conditions: This symptom occurs when using Port Address Translation (PAT).
Workaround: Use the clear ip nat translation * command.
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CSCeh49504
Symptoms: BGP redistribution into EIGRP based on a standard community or AS path does not
work as expected.
work as expected.