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August 2008

OmniSwitch 6400 ------ Release 6.3.3.R01 Page 23 of 55

Destination hosts signal their intent to receive a specific multicast stream by sending a request to do so to a

nearby switch using Internet Group Management Protocol (IGMP). The switch then learns on which ports

multicast group subscribers are attached and can intelligently deliver traffic only to the respective ports.

This mechanism is often referred to as IGMP snooping (or IGMP gleaning). Alcatel-Lucent’s

implementation of IGMP snooping is called IP Multicast Switching (IPMS). IPMS allows an OmniSwitch

to efficiently deliver multicast traffic in hardware at wire speed.

Both IGMP version 3 (IGMPv3), which handles forwarding by source IP address and IP multicast destina-

tion, and IGMP version 2 (IGMPv2), which handles forwarding by IP multicast destination address only,

are supported. IPMS is supported on IPv4 and IPv6 (MLD) on the OmniSwitch 6400.

IP Multicast Switching (IPMS) - Proxying

IP multicast proxying and configuring the IGMP and MLD unsolicited report interval are available with

this implementation of IPMS. Proxying enables the aggregation of IGMP and MLD group membership

information and the reduction in reporting queriers. The unsolicited report interval refers to the time period

in which to proxy any changed IGMP membership state.

IP Multinetting

IP multinetting allows multiple subnets to coexist within the same VLAN domain. This implementation of

the multinetting feature allows for the configuration of up to eight IP interfaces per a single VLAN. Each

interface is configured with a different subnet.

IP Route Map Redistribution

Route map redistribution provides the ability to control which routes from a source protocol are learned

and distributed into the network of a destination protocol. A route map consists of one or more user-

defined statements that can determine which routes are allowed or denied access to the network. In addi-

tion, a route map may also contain statements that modify route parameters before they are redistributed.

Redistribution is configured by specifying a source and destination protocol and the name of an existing

route map. Criteria specified in the route map is applied to routes received from the source protocol.

IPX Routing

The Internet Packet Exchange (IPX) protocol, developed by Novell for NetWare, is a Layer 3 protocol

used to route packets through IPX networks. (NetWare is Novell’s network server operating system.) This

implementation of IPX routing is software based with limited performance.

IPX specifies a connectionless datagram similar to the IP packet of TCP/IP networks. An IPX network

address consists of two parts: a network number and a node number. The IPX network number is assigned

by the network administrator. The node number is the Media Access Control (MAC) address for a network

interface in the end node.

Learned Port Security (LPS)

Learned Port Security (LPS) provides a mechanism for authorizing source learning of MAC addresses on

10/100/1000, Gigabit, and Gigabit Ethernet ports. Using LPS to control source MAC address learning

provides the following benefits:

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