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Managing IPv4 and IPv6 Multicast
1141
What Is Multicast Tunneling?
If Multicast traffic is to be routed through a part of a network that does not
support multicasting (routers which are not multicast capable) then the
multicast packets are encapsulated in an IP datagram and sent as a unicast
packet. When the multicast router at the remote end of the tunnel receives
the packet, the router strips off the IP encapsulation and forwards the packet
as an IP Multicast packet. This process of encapsulating multicast packets in
IP is called tunneling.
What Is IGMP?
The Internet Group Management Protocol (IGMP) is used by IPv4 systems
(hosts, L3 switches, and routers) to report their IP multicast group
memberships to any neighboring multicast routers. The PowerConnect 7000
Series switch performs the multicast router role of the IGMP protocol, which
means it collects the membership information needed by the active multicast
routing protocol.
The PowerConnect 7000 Series switch supports IGMP Version 3. Version 3
adds support for source filtering, which is the ability for a system to report
interest in receiving packets only from specific source addresses, as required to
support Source-Specific Multicast [SSM], or from all but specific source
addresses, sent to a particular multicast address. Version 3 is designed to be
interoperable with Versions 1 and 2.
Understaning IGMP Proxy
IGMP proxy enables a multicast router to learn multicast group membership
information and forward multicast packets based upon the group
membership information. The IGMP Proxy is capable of functioning only in
certain topologies that do not require Multicast Routing Protocols (i.e.,
DVMRP, PIM-DM, and PIM-SM) and have a tree-like topology, as there is no
support for features like reverse path forwarding (RPF) to correct packet route
loops.
The proxy contains many downstream interfaces and a unique upstream
interface explicitly configured. It performs the host side of the IGMP protocol
on its upstream interface and the router side of the IGMP protocol on its
downstream interfaces.
Summary of Contents for PowerConnect 7024
Page 134: ...134 Setting Basic Network Information ...
Page 290: ...290 Managing General System Settings Figure 11 14 SNTP Servers Table ...
Page 348: ...348 Configuring SNMP ...
Page 430: ...430 Monitoring Switch Traffic ...
Page 444: ...444 Configuring iSCSI Optimization ...
Page 538: ...538 Configuring 802 1X and Port Based Security ...
Page 594: ...594 Configuring VLANs Figure 21 16 GVRP Port Parameters Table ...
Page 600: ...600 Configuring VLANs Figure 21 23 Double VLAN Port Parameter Table ...
Page 658: ...658 Configuring the Spanning Tree Protocol ...
Page 693: ...Configuring Port Based Traffic Control 693 Figure 24 3 Storm Control 5 Click Apply ...
Page 780: ...780 Configuring Connectivity Fault Management ...
Page 804: ...804 Snooping and Inspecting Traffic Figure 27 17 DAI Interface Configuration Summary ...
Page 818: ...818 Snooping and Inspecting Traffic ...
Page 836: ...836 Configuring Link Aggregation ...
Page 882: ...882 Configuring DHCP Server Settings ...
Page 916: ...916 Configuring L2 and L3 Relay Features Figure 33 3 DHCP Relay Interface Summary ...
Page 924: ...924 Configuring L2 and L3 Relay Features Figure 33 12 IP Helper Statistics ...
Page 930: ...930 Configuring L2 and L3 Relay Features ...
Page 1004: ...1004 Configuring OSPF and OSPFv3 ...
Page 1044: ...1044 Configuring VRRP ...
Page 1057: ...Configuring IPv6 Routing 1057 Figure 37 9 IPv6 Route Preferences ...
Page 1064: ...1064 Configuring IPv6 Routing ...
Page 1084: ...1084 Configuring DHCPv6 Server and Relay Settings ...
Page 1091: ...Configuring Differentiated Services 1091 Figure 39 5 DiffServ Class Criteria ...
Page 1114: ...1114 Configuring Differentiated Services ...
Page 1130: ...1130 Configuring Class of Service ...
Page 1136: ...1136 Configuring Auto VoIP ...
Page 1216: ...1216 Managing IPv4 and IPv6 Multicast ...