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

Last Modified

Sep 14, 2019

Products (1)

  • Cisco 2900 Series Integrated Services Routers

Known Affected Releases


Description (partial)

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    Null       11 08FF 1985  6829       <=== Destination is Null interface.
Gi0/0    Null       11 08FD 1983   211        <=== Destination is Null interface.
Gi0/1.13    Local  11 007B 007B     3 
Gi0/0     Null  11 0523 3E9C     4     <=== Destination is Null interface.

<--- Output truncated --->

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