UDLR-IGMP Join

1) A sends queries using a unicast address other

than the one on the unidirectional link (udl)

2) B and C learn querier

5) A gets report for G, associates

C with UDLR subnet,

and puts it on forward list

6) A forwards C’s report for G on UDLR link

Multicast source

in Group G

4) C knows no reporter for G,

forwards IGMP report to

A’s non-udl unicast address

3) Receiver reports

for Group G

7) B learns C is reporter for G

8) B suppresses report for G

9) Receiver reports

for Group G