
775
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
Workaround: There is no workaround.
• CSCsm88496
Symptoms: MPLS disposition traffic on ESM20 may get dropped.
Conditions: Occurs with scaled EVC and VPLS/EOMPLS configuration after several line card
online insertion and removal (OIR) events and then an SSO.
Workaround: Toggle MPLS configuration on the interface that has the issue occur.
• CSCsm89526
Symptoms: When a new class-map configuration is added to policy-map, packet (which belongs to
another existing class) drop issue will be observed.
Conditions: Occurs on a Cisco 7600 router with ES20 and running Cisco IOS Release 12.2(33)SRB.
Workaround: There is no workaround.
• CSCsm89795
Symptoms: The router keeps reloading and complaining about unavailability of memory.
Conditions: This symptom is observed if the router is directly connected to a DHCP server or if an
attack is made by flooding DHCP replies.
Workaround: There is no workaround.
• CSCsm90366
Symptoms: IP Multicast cannot be L3 switched between two routed pseudowires.
Conditions: Occurs when 7600-SIP-600 or 7600-ES-20 are used as the EoMPLS imposition card.
IP multicast traffic will be dropped when the incoming and outgoing interface are both routed
pseudowires. IP unicast traffic is not affected.
Workaround: There is no workaround.
Further Problem Description: VPLS/EoMPLS check for split-horizon forwarding does not work
properly when the packet has been L3 Multicast switched. The split-horizon check is intended to be
bypassed when the packet has been L3 switched as is the case for routed PW feature. However, that
check does not work properly for L3 multicast switching.
Cisco IOS Release 12.2(33)SRB3 is unaffected. The issue does, however, apply to Cisco IOS
Release 12.2(33)SRC.
• CSCsm90525
Symptoms: Under certain scenarios when deploying Multicast extranets, a change in the unicast
routing information can cause the router to unexpectedly crash.
Conditions: This issue is only seen when Multicast extranets are deployed.
Workaround: There is no workaround.
• CSCsm92206
Symptoms: A router may crash when a range of interfaces is set to default configurations.
Conditions: The crash occurs when a range of interfaces is configured in a console connection to
belong to a bridge group and when the same set of configurations is removed simultaneously from
a vty connection.
Workaround: Avoid simultaneous tasks (configuring/unconfiguring) through the console and vty.
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