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Cisco Bug: CSCte97591 - 7304 (non-DR) not send PIM prune so cause duplicate mcast traffic

Last Modified

Apr 03, 2018

Products (7)

  • Cisco IOS
  • Cisco 10000 Performance Routing Engine 4 (PRE4)
  • Cisco 10000 Performance Routing Engine 3 (PRE3)
  • Cisco 10000 Performance Routing Engine 2 (PRE2)
  • Cisco 7304 NSE-150 Network Services Engine
  • Cisco 7304 NSE-100 Network Services Engine
  • Cisco 7304 NPE-G100 Network Processing Engine

Known Affected Releases

12.2(33)SB8 15.1(1)T3.12

Description (partial)

 A (*,G) PIM state in Pruned state with an empty outgoing interface list
continues to send periodic PIM
 (*,G) Joins upstream.
 This issue is seen occasionally when a router is reloaded in topologies where
a it is <I>not</I> a PIM
 Designated Router(DR) on downstream interfaces having IGMP members and
<I>is</I> a DR on
 upstream incoming interface for a group G. In such conditions, the (*,G) state
is Pruned and has an
 empty outgoing interface list, but the router sends periodic PIM (*,G) Joins
upstream thereby pulling in
 unwanted multicast traffic. A more apparent indicator of this symptom is the
output of
 <CmdBold>show ip mroute<NoCmdBold> that displays (*,G) state with
<I>C</I>(Connected) and
 <I>P</I> (Pruned) flags and a <I>NULL</I> outgoing interface list.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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