Configuration: Multicast - ZyXEL Communications GS1900-8 User Manual

25.1 Overview
This sect ion provides inform at ion for M ult ica st in Con figu r a t ion.
Tradit ionally, I P packet s are t ransm it t ed in one of eit her t wo ways - Unicast ( 1 sender t o 1 recipient )
or Broadcast ( 1 sender t o everybody on t he net work) . Mult icast delivers I P packet s t o j ust a group
of host s on t he net work.
25.2 IGMP
I GMP ( I nt ernet Group Managem ent Prot ocol) is a net work- layer prot ocol used t o est ablish
m em bership in an I Pv4 m ult icast group - it is not used t o carry user dat a. Refer t o RFC 1112, RFC
2236 and RFC 3376 for inform at ion on I GMP versions 1, 2 and 3 respect ively.
25.2.1 The Global Screen
Use t his screen t o view t he I GM P Globa l set t ings. Click Configur a t ion > M ult ica st > I GM P t o
open t his screen.
Figure 134 Configurat ion > Mult icast > I GMP
The following t able describes t he labels in t his screen.
Table 100 Configurat ion > Mult icast > I GMP
LABEL
I GMP Global
Snooping St at us
C

Configuration: Multicast

DESCRIPTION
Select En a ble t o t urn on I GMP packet snooping or D isa ble t o t urn snooping off.
GS1900 Series User's Guide
141
HAPTER
2 5