ZyXEL Communications IES4005M, User Manual

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Chapter 25 VLAN
IES4005M User’s Guide
183
25.1.7 Multicast VLAN
IGMP (Internet Group Management Protocol) is a network-layer protocol used to establish
membership in a multicast group - it is not used to carry user data. Multicast VLAN is designed for
applications (such as Media-on-Demand (MoD)) using multicast traffic across an Ethernet ringbased
service provider network. Multicast VLAN allows one single multicast VLAN to be shared among
different subscriber VLANs on the network. This improves bandwidth utilization by reducing
multicast traffic in the subscriber VLANs and simplifies multicast group management.
• Multicast VLAN (MVLAN) applies only to downstream multicast stream and IGMP or Multicast
Listener Discovery (MLD) packets. The IES forwards upstream IGMP packets according to the
unicast VLAN modes the UNI port has joined.
• MVLAN must co-work with one of the 4 VLAN modes - VLAN tagging and trunk, stacking VLAN
tagging and trunk, VLAN translation and aggregation, or stacking VLAN translation and
aggregation.
• A UNI port must join one of the 4 VLAN modes before it can join a MVLAN. The UNI VLAN in the
joined VLAN modes and MVLAN must be the same.
• Add the ATM VC to MVLAN (see Section 14.1 on page 126 ).
25.1.8 Management and VoIP VLAN
• The management VLAN and VoIP VLAN both accept only single tagged packets on both the NNI
and CPU ports.
• UNI ports cannot communicate with the CPU port.
Table 123
Multicast VLAN CLI examples
VLAN MODE NNI VLAN UNI VLAN CLI EXAMPLES
Multicast VLAN
(PTM-untagged)
S(VID a) untag
interface dsl 2/1
vlan trunk uni-untag svlan 100 spbit 0
igmp-mld mvlan 200 untag
Multicast VLAN
(ATM-untagged)
S(VID a) untag
interface dsl 2/1
vlan trunk atm-vc 0/33 uni-untag svlan 100 spbit 0
igmp-mld mvlan 200 untag
atm-vc 0/33 vc priority 0 mvlan
Multicast VLAN
(PTM-tagged) S(VID a) C(VID a)
interface dsl 2/1
vlan trunk uni-vlan 200
igmp-mld mvlan 200
Multicast VLAN
(ATM-tagged)
S(VID a) C(VID a)
interface dsl 2/1
vlan trunk atm-vc 0/33 uni-vlan 200
igmp-mld mvlan 200
Multicast VLAN
(PTM-tagged) S(VID x) C(VID a)
interface dsl 2/1
vlan trunk uni-vlan 100
igmp-mld mvlan 200 uni-vlan 100
Multicast VLAN
(ATM-tagged) S(VID x) C(VID a)
interface dsl 2/1
vlan trunk atm-vc 0/33 uni-vlan 100
igmp-mld mvlan 200 uni-vlan 100
atm-vc 0/33 vc priority 0 mvlan