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Cisco Bug: CSCuq00715 - Multicast packets are not forwarded to OIL even with correct RPF check

Last Modified

Jan 28, 2017

Products (1)

  • Cisco 2900 Series Integrated Services Routers

Known Affected Releases

15.2(4)M

Description (partial)

Symptom:
No (S,G) mroute entries are created on the router for certain multicast groups that have active senders and interested receivers.

Output of "show ip cache flow" command reveals that the multicast packets are dropped (sent to Null interface).

r1803b#show ip cache flow
<--- Output truncated --->

SrcIf         SrcIPaddress    DstIf         DstIPaddress    Pr SrcP DstP  Pkts
Gi0/0         10.16.32.216    Null          224.1.3.3       11 08FF 1985  6829       <=== Destination is Null interface.
Gi0/0         10.16.32.216    Null          224.1.3.1       11 08FD 1983   211        <=== Destination is Null interface.
Gi0/1.13      172.24.99.27    Local         10.242.200.195  11 007B 007B     3 
Gi0/0         10.16.32.33     Null          239.255.123.51  11 0523 3E9C     4     <=== Destination is Null interface.

<--- Output truncated --->

Conditions:
Unknown.
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