Enterasys Networks X-PeditionTM manual Configuring PIM-SM and Igmp

7

Configuring PIM-SM and IGMP

This chapter describes Protocol Independent Multicast - Sparse Mode (PIM-SM) and Internet Group Management Protocol (IGMP) configuration.

Features

The XSR supports the following IGMP/PIM features:

•IGMP versions 1, 2 and 3 (on LAN interface only)

•PIM-SM version 2

•Static IGMP group membership

•Dynamic RP (BootStrap without Admin Scope Zone support)

•Static RP

•Register Mechanism

•Rendezvous Point Tree (RPT) Build-up

•Shortest Path Tree (SPT) Build-up

•RPT to SPT Switch

•Assert Mechanism

•Join/Prune Mechanism

•Source Specific Multicast (SSM) Support

•Multicast over GRE tunnel

Differences with Industry-Standard Approach

The XSR’s implementation of IGMP differs from the industry-standard approach as follows:

•The XSR stipulates the RFC-3376 default Query interval of 125; the industry-standard value is 60.

•The XSR supports dynamic learning of the robust value and query interval from the received query message, as stipulated by RFC-3376, while the industry-standard router does not. The XSR also supports static configuration and the latest value, either learned dynamically or statically configured, will overwrite the previous value.

The XSR’s implementation of PIM-SM differs from the industry-standard approach as follows:

•When sending a Register packet, the XSR calculates the checksum of the Register packet header only, in keeping with the RFC-2236 requirement. The industry-standard router

XSR User’s Guide 7-1