175
3-15. IGMP
IGMP is used to establish the multicast groups to forward the multicast
packet to the member ports, and in nature, avoids wasting the bandwidth while IP
multicast packets are running over the network. This is because a switch not
supporting IGMP can not tell the multicast packet from the broadcast packet, so it
can only treat them all as the broadcast packet. Without IGMP, the multicast packet
forwarding function is plain and nothing the same as broadcast packet.
A switch supporting IGMP Proxy with the functions of query, report and leave,
a type of packet exchanged between IP Multicast Router/Switch and IP Multicast
Host, can update the information of the Multicast table when a member (port) joins
or leaves an IP Multicast Destination Address. With this function, once a switch
receives an IP multicast packet, it will forward the packet to the members who
joined in a specified IP multicast group before.
IGMP Snooping is included in IGMP Proxy, but IGMP Proxy terminates the
IGMP packets from multicast users and requests upper-level network equipment for
multicast recourses as a proxy of the multicast user.
3-15-1 Proxy
Function name:
IGMP Proxy Configuration
Function description:
IGMP proxy enables the switch to issue IGMP host messages on behalf of
hosts that the system discovered through standard IGMP interfaces. The
switch acts as a
proxy
for its hosts.
You enable IGMP proxy on the switch, which connects to a router closer to the
root of the tree. This interface is the
upstream
interface
. The router on the
upstream interface should be running IGMP.
Fig. 3-163 IGMP Proxy
Summary of Contents for GS-2224L
Page 1: ......
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Page 34: ...24 Fig 2 15 Office Network Connection Fig 2 14 Peer to peer Network Connection ...
Page 78: ...68 Fig 3 28 ...
Page 83: ...73 Fig 3 31 ...
Page 91: ...81 Fig 3 39 Fig 3 40 Fig 3 41 ...
Page 113: ...103 Fig 3 67 Ingress Port Fig 3 68 ...
Page 115: ...105 Fig 3 71 Fig 3 72 Fig 3 73 ARP Fig 3 74 ARP ...
Page 116: ...106 Fig 3 75 ARP Fig 3 76 ARP Fig 3 77 ARP Fig 3 78 ARP ...
Page 117: ...107 Fig 3 79 ARP Fig 3 80 ARP Fig 3 81 ARP Fig 3 82 ARP ...
Page 118: ...108 Fig 3 83 ARP Fig 3 84 ARP Fig 3 85 ARP Fig 3 86 ARP Fig 3 87 ARP ...
Page 119: ...109 Fig 3 88 IPv4 Fig 3 89 IPv4 Fig 3 90 IPv4 ...
Page 120: ...110 Fig 3 91 IPv4 Fig 3 92 IPv4 Fig 3 93 IPv4 Fig 3 94 IPv4 Fig 3 95 IPv4 ...
Page 121: ...111 Fig 3 96 IPv4 Fig 3 97 IPv4 Fig 3 98 IPv4 Fig 3 99 IPv4 Fig 3 100 IPv4 ...
Page 122: ...112 Fig 3 101 IPv4 Fig 3 102 IPv4 Fig 3 103 IPv4 Fig 3 104 IPv4 ...
Page 123: ...113 Fig 3 105 IPv4 Fig 3 106 IPv4 Fig 3 107 IPv4 ...
Page 124: ...114 Fig 3 108 IPv4 Fig 3 109 IPv4 Fig 3 110 IPv4 Fig 3 111 IPv4 ...
Page 125: ...115 Fig 3 112 IPv4 Fig 3 113 IPv4 Fig 3 114 IPv4 ...
Page 126: ...116 Fig 3 115 IPv4 Fig 3 116 IPv4 Fig 3 117 IPv4 ...
Page 127: ...117 Fig 3 118 Action Fig 3 119 Rate Limiter ...
Page 128: ...118 Fig 3 120 Port Copy Fig 3 121 DMAC Filter ...
Page 129: ...119 Fig 3 122 VLAN ID Filter Fig 3 123 VLAN ID Filter Fig 3 124 Tag Priority ...
Page 141: ...131 Fig 3 126 Set up Policy Rules Fig 3 127 Set up Policy Rules Fig 3 128 Set up Policy Rules ...
Page 143: ...133 Fig 3 132 Set up Port Policies Fig 3 133 Set up Port Policies Finish ...
Page 159: ...149 Fig 3 145 ...
Page 204: ...194 Fig 4 1 Fig 4 2 ...