Cabletron Systems SmartSwitch IP Routing Protocols, SSR supports standards-based TCP, UDP, and IP

Chapter 6: IP Routing Configuration Guide

The SSR supports standards-based TCP, UDP, and IP.

IP Routing Protocols

The SSR supports standards-based unicast and multicast routing. Unicast routing protocol support includes Interior Gateway Protocols and Exterior Gateway Protocols. Multicast routing protocols are used to determine how multicast data is transferred in a routed environment.

Unicast Routing Protocols

Interior Gateway Protocols are used for routing networks that are within an “autonomous system,” a network of relatively limited size. All IP interior gateway protocols must be specified with a list of associated networks before routing activities can begin. A routing process listens to updates from other routers on these networks and broadcasts its own routing information on those same networks. The SSR supports the following Interior Gateway Protocols:

•Routing Information Protocol (RIP) Version 1, 2 (RFC 1058, 1723)

•Open Shortest Path First (OSPF) Version 2 (RFC 1583)

Exterior 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)

Multicast Routing Protocols

IP multicasting allows a host to send traffic to a subset of all hosts. These hosts subscribe to group membership, thus notifying the SSR of participation in a multicast transmission.

Multicast routing protocols are used to determine which routers have directly attached hosts, as specified by IGMP, that have membership to a multicast session. Once host memberships are determined, routers use multicast routing protocols, such as DVMRP, to forward 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 2236

The SSR also supports the latest DVMRP Version 3.0 draft specification, which includes mtrace, Generation ID and Pruning/Grafting.

86 SmartSwitch Router User Reference Manual