
711
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
• CSCsl20856
Symptoms: The OSPF SNMP code may run for an extended period on systems with many interfaces.
This can prevent other tasks in the system from being scheduled as quickly as they need to be.
Conditions: Problem is seen when having large number (greater than 1000) interfaces on the router
with OSPF configured on only a few (or none) of them and when running SNMP queries on OSPF
MIB.
Workaround: There is no workaround.
• CSCsl21668
Symptoms: MPLS packets are punted to RP during tag2tag operation for the Scalable EoMPLS VCs.
Scalable EoMPLS is the type of EoMPLS VC where the xconnect is configured on the EVC or on
the sub- interface of a SIP-400 line card.
Conditions: Occurs when a shut/no shut is done on the core facing line card. Also occurs when
online insertion and removal (OIR) is performed on the card.
Workaround: Decrease the rate of punted packets to RP, which will reduce the CPU load to correct
the problem.
Further Problem Description: The tag2tag adjacency on the forwarding engine is programmed as
punt, which causes packets to be punted to RP. The tag2tag adjacency is programmed as punt
because the adjacency is incomplete during OIR or shut/no shut operation. Hence, if the traffic to
the route processor is reduced adjacency could be completed by ARP.
• CSCsl21948
Symptoms: The show ip subscriber dangle command may cause a crash.
Conditions: This symptom is observed in Cisco IOS Release 12.2(31)SB01 and later releases when
there are dangling IP sessions.
Workaround: There is no workaround.
• CSCsl22080
Symptoms: WebVPN hangs after a few days of working. When this happens, no WebVPN
connections are active and no new connections can be established. The debug ip tcp transaction
command shows connection queue limit reached: port 443 errors. The show tcp brief command
displays many sessions in SYNRCVD and TIMEWAIT states. Problem is recovered either by reload
or by entering the clear tcp tcb * command. There are few stale sessions in CLOSED state left after
clearing TCP.
Conditions: Issue seen in Cisco IOS Release 12.4.15T and Cisco IOS Release 12.4.15T1 when
WebVPN is configured. The issue is intermittent and happens after few days or weeks of working.
Workaround: To restore TCP connectivity, issue clear tcp tcb * or reload the router. Note that this
will clear all TCP sessions on the router.
• CSCsl23306
Symptoms: The standby RP or standby SP may crash.
Conditions: The symptoms are observed when the RP’s neighbor is adding or deleting CTS SXP
(Cisco TrustSecure SGT Extended Protocol) connections, or attempting an SSO switchover with
CTS SXP enabled.
Workaround: There is no workaround.
• CSCsl26740
Symptoms: Router crash when traffic engineering (TE) tunnels are removed.
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