Chapter 8: IP Routing Configuration Guide78 SmartSwitch Router User Reference ManualExterior Gateway Protocols are used to transfer information between different“autonomous systems”. The SSR supports the following Exterior Gateway Protocol:• Border Gateway Protocol (BGP) Version 3, 4 (RFC 1267, 1771). Configuring BGP for theSSR is described in Chapter 12.Multicast Routing ProtocolsIP multicasting allows a host to send traffic to a subset of all hosts. These hosts subscribeto group membership, thus notifying the SSR of participation in a multicast transmission.Multicast routing protocols are used to determine which routers have directly attachedhosts, as specified by IGMP, that have membership to a multicast session. Once hostmemberships are determined, routers use multicast routing protocols, such as DVMRP, toforward multicast traffic between routers.The SSR supports the following multicast routing protocols:• Distance Vector Multicast Routing Protocol (DVMRP) RFC 1075• Internet Group Management Protocol (IGMP) as described in RFC 2236The SSR also supports the latest DVMRP Version 3.0 draft specification, which includesmtrace, Generation ID and Pruning/Grafting. Configuring multicast routing for the SSR isdescribed in Chapter 14.Configuring IP Interfaces and ParametersYou can configure an IP interface to a single port or to a VLAN. This section provides anoverview of configuring IP interfaces.Interfaces on the SSR are logical interfaces. Therefore, you can associate an interface with asingle port or with multiple ports:• To associate an interface with a single port, use the port option with theinterface create command.• To associate an interface with multiple ports, first create an IP VLAN and add ports toit, then use the vlan option with the interface create command.The interface create ip command creates and configures an IP interface. Configuration ofan IP interface can include information such as the interface’s name, IP address, netmask,broadcast address, and so on. You can also create an interface in a disabled (down) stateinstead of the default enabled (up) state.Note: You must use either the port option or the vlan option with the interface createcommand.
