Does anyone know what LY flag stands for in IGMP

[hfakoor222]

Heres output

sh ip mroute





(172.16.20.4, 232.32.32.32), 00:00:27/00:02:54, flags: LT
Incoming interface: FastEthernet0/0, RPF nbr 0.0.0.0
Outgoing interface list:
Loopback2, Forward/Dense, 00:00:27/00:00:00

anyone know what this means ?

Thanks

[Jon Marshall · Accepted solution]

The L flag means the router itself is a member of the multicast group as opposed to just forwarding the group to receivers. 

The T flag means that at least one packet has been received on the shortest path tree (SPT). 

Jon