References; Before You Begin; Configuring The Switch Fabric Bandwidth - Juniper JUNOSE 11.0.X MULTICAST ROUTING Configuration Manual

JUNOSe 11.0.x Multicast Routing Configuration Guide

References

For more information about IP multicast, see the following resources:
NOTE: IETF drafts are valid for only 6 months from the date of issuance. They must
be considered as works in progress. Refer to the IETF Web site at http://www.ietf.org
for the latest drafts.

Before You Begin

You can configure multicasting on IPv4 and IPv6 interfaces.
For information about configuring IP and IPv6 interfaces, see JUNOSe IP, IPv6, and
IGP Configuration Guide.
For information about configuring multicast on IPv6 interfaces, see "Configuring
IPv6 Multicast" on page 147.

Configuring the Switch Fabric Bandwidth

By default, the switch fabric for the Juniper Networks ERX1440, ERX310, E120, and
E320 Broadband Services Routers uses a bandwidth weighting ratio of 15:2 for
multicast-to-unicast weighted round robin (WRR). In the absence of strict-priority
traffic, and when both unicast and multicast traffic compete for switch fabric
bandwidth, the switch fabric allocates 15/17ths of the available bandwidth to multicast
traffic and 2/17ths of the available bandwidth to unicast traffic.
You can use the fabric weights command to change the ratio for multicast-to-unicast
traffic on the router switch fabric. For more information about the fabric weights
command, see JUNOSe System Basics Configuration Guide.
6

References

See E120 and E320 Module Guide, Table 1, Modules and IOAs for detailed module
specifications.
See E120 and E320 Module Guide, Appendix A, IOA Protocol Support for information
about the modules that support IP multicasting.
A " traceroute" Facility for IP Multicast draft-ietf-idmr-traceroute-ipm-07.txt
(January 2001 expiration)
RFC 2858 Multiprotocol Extensions for BGP-4 (June 2000)
RFC 2932 IPv4 Multicast Routing MIB (October 2000)
RFC 3292 General Switch Management Protocol (GSMP) V3 (June 2002)