Ip And Vlan Statistics; Igmp Statistics; Blocking And Limiting Multicast Traffic; Blocking Mroutes - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - MULTICAST ROUTING CONFIGURATION GUIDE 2010-10-07 Configuration Manual

Blocking and Limiting Multicast Traffic

Blocking Mroutes

ip block-multicast-sources
Copyright © 2010, Juniper Networks, Inc.

IP and VLAN Statistics

Use the show vlan subinterface command to display statistics for a VLAN interface
configured over port 8. For more information, see Monitoring Ethernet Interfaces in the
JunosE Physical Layer Configuration Guide.
Use the show ip interface command to display statistics for an IP interface configured
over port 8. For more information, see Monitoring IP in the JunosE IP, IPv6, and IGP
Configuration Guide.
Multicast traffic redirected by the hardware multicast packet replication feature is
displayed in the statistics for the IP or VLAN interface over port 8, not the original IP or
VLAN interface over the physical port.
The statistics for the IP or VLAN interface over port 8 reflect the number of packets that
passed through this interface destined for the hardware multicast packet replication
hardware. These statistics have no direct correlation to the number of packets being
transmitted from any of the physical ports.

IGMP Statistics

Use the show ip igmp interface command to display statistics, including hardware
multicast packet replication configuration, for an IP interface stacked over port 8. For
more information, see "Monitoring IGMP" on page 61 in "Configuring IGMP" on page 43.
You can either block mroute creation, limit the multicast bandwidth admitted on an
outgoing interface, or limit outgoing interface creation on a port.
By default, when an interface that is configured with one or more multicast protocols
(for example, PIM or IGMP) receives multicast traffic, even when the scope of that traffic
exceeds link-local, the virtual router creates an mroute. You can use the ip
block-multicast-sources command to block all multicast traffic with a scope larger than
link-local (for example, global) and prevent mroute creation under these conditions.
NOTE: Issuing this command does not affect reception of link-local multicast
packets.
Use to prevent mroute creation by blocking multicast traffic that has a scope larger
than link-local (for example, global).
Example
host1(config-if)#ip block-multicast-sources
Chapter 1: Configuring IPv4 Multicast
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