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Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(31)S2
• CSCej15682
Symptoms: When multicast traffic is being sourced from different sources, and one of the sources
is removed, the show ip mroute vrf command for the VRFs still shows that source as active.
Conditions: This symptom is observed when a source is no longer active when using the show ip
mroute vrf command.
Workaround: There is no workaround.
• CSCej20986
Symptoms: An Engine 4 ingress line card may enter an incorrect carving state in which it sends all
packets that are larger than 608 bytes to the buffer size pool (freeq) of the wrong egress line card,
causing all packets that are larger than 608 bytes to be dropped. The symptom is especially
noticeable when the egress line card is an Engine 2 line card.
Conditions: This symptom is observed rarely on a Cisco 12000 series.
Workaround: Reload the Engine 4 ingress line card.
• CSCej22910
Symptoms: Multicast traffic does not reach a CE which is connected via static IGMP joins to PE.
Conditions: The DecapPE should have a Tx line card with one port toward the core and another port
toward the edge. Traffic from EncapPE is toward the CE. There should be static joins at DecapPE
with SSM configured.
Workaround: There is no workaround.
• CSCej24169
Symptoms: High CPU usage occurs on an Engine 6 line card that processes multicast traffic.
Conditions: This symptom is observed on a Cisco 12000 series when the Engine 6 line card is an
ingress line card that processes SSM multicast traffic.
Workaround: Lower the traffic rate, configure a mode other than SSM, or replace the Engine 6 line
card with an Engine 4 line card.
• CSCej25402
Symptoms: Standby RP reboots continuously on STANDBY HOT (SSO) mode.
Conditions: This symptom is observed with an E3 4xGIGE card in slot 12 of the router. In any other
scenario the problem will not be seen.
Workaround: There is no workaround.
• CSCej28374
Symptoms: Tracebacks were observed when applying a service policy to a main interface if a
subinterface is configured. The subinterface inherits the service policy, producing the tracebacks.
There was no adverse behavior of the service policy. It worked properly but triggered tracebacks.
Conditions: The tracebacks could be observed if the configuration includes subinterfaces and if a
service policy is applied to the main interface.
Workaround: Remove the service policy on the main interface and apply it to the subinterface in the
configuration.
• CSCin72437
Symptoms: A port adapter in a router or FlexWan module in a switch may crash when an SSO
switchover occurs on a Route Processor or Supervisor Engine.
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