SRX

 Please consider the following example:

Listener-------f1 SRX---f2---------------Rest of Multicast Network--SRC 1.1.1.1

235.1.1.1

DENSE MODE CASE:

Suppose  SRC is generating packet every 2 msec for group 235.1.1.1

If we isse  "clear pim join "   on SRX, to flush multicast cache ( that can be seen as show multicast route), will it cause SRX to drop ( 1.1.1.1,235.1.1.1) packet?

Will same be true for SPARSE MODE as well?

Thanks and have a nice weekend!!

when there is no active group members, system would send prune msg upstream to its neighbor. clearing those joins shouldn't ideally affect. The command is not only "clear pim join" but its as follows:

> clear pim join ?  
Possible completions:
  <group>              IP address and optional prefix length of group
  all                  Clear all PIM join/prune states
  bidirectional        Clear only bidirectional PIM entries
  dense                Clear only PIM dense-mode entries
  exact                Clear only group that matches exactly
  inet                 Clear IPv4 join/prune state
  inet6                Clear IPv6 join/prune state
  instance             Name of instance
  logical-system       Name of logical system, or 'all'
  rp                   IP address and optional prefix length of rendezvous point
  sg                   Clear only S,G entries
  source               IP address and optional prefix length of source
  sparse               Clear only PIM sparse-mode entries (including SSM)
  star-g               Clear only *,G entries

So clear the group that is inactive, not all to be safe.

Can be used for spare mode as well followed group address.