BigIron RX Series Configuration Guide
661
53-1001810-01
Configuring IP multicast traffic reduction
23
•
All the device ports connected to the source and receivers or routers must be in the same
port-based VLAN.
•
The PIM SM snooping feature assumes that the group source and the device are in different
subnets and communicate through a router. The source must be in a different IP subnet than
the receivers. A PIM SM router sends PIM join and prune messages on behalf of a multicast
group receiver only when the router and the source are in different subnets. When the receiver
and source are in the same subnet, they do not need the router in order to find one another.
They find one another directly within the subnet.
The device forwards all IP multicast traffic by default. Once you enable IP multicast traffic
reduction and PIM SM traffic snooping, the device initially blocks all PIM SM traffic instead of
forwarding it. The device forwards PIM SM traffic to a receiver only when the device receives a
join message from the receiver. Consequently, if the source and the downstream router are in
the same subnet, and PIM SM traffic snooping is enabled, the device blocks the PIM SM traffic
and never starts forwarding the traffic. This is because the device never receives a join
message from the downstream router for the group. The downstream router and group find
each other without a join message because they are in the same subnet.
NOTE
If the “route-only” feature is enabled on a device, PIM SM traffic snooping will not be supported.
Enabling PIM SM traffic snooping
To enable PIM SM traffic snooping, enter the following commands at the global CONFIG level of the
CLI.
BigIron RX(config)# ip multicast
BigIron RX(config)# ip pimsm-snooping
The first command enables IP multicast traffic reduction. This feature is similar to PIM SM traffic
snooping but listens only for IGMP information, not PIM SM information. You must enable both IP
multicast traffic reduction and PIM SM traffic snooping to enable the device to listen for PIM SM
join and prune messages.
Syntax: [no] ip multicast [active | passive]
This command enables IP multicast traffic reduction. The active | passive parameter specifies the
mode. The PIM SM traffic snooping feature assumes that the network has routers that are running
PIM SM.
Syntax: [no] ip pimsm-snooping
This command enables PIM SM traffic snooping.
To disable the feature, enter the following command.
BigIron RX(config)# no ip pimsm-snooping
If you also want to disable IP multicast traffic reduction, enter the following command.
BigIron RX(config)# no ip multicast
Содержание Brocade DCX
Страница 40: ...xl BigIron RX Series Configuration Guide 53 1001810 01 ...
Страница 72: ...lxxii BigIron RX Series Configuration Guide 53 1001810 01 ...
Страница 88: ...16 BigIron RX Series Configuration Guide 53 1001810 01 Searching and filtering output 1 ...
Страница 300: ...228 BigIron RX Series Configuration Guide 53 1001810 01 Displaying IP information 7 ...
Страница 318: ...246 BigIron RX Series Configuration Guide 53 1001810 01 Deploying a LAG 8 ...
Страница 418: ...346 BigIron RX Series Configuration Guide 53 1001810 01 SuperSpan 12 ...
Страница 482: ...410 BigIron RX Series Configuration Guide 53 1001810 01 MRP CLI example 14 ...
Страница 506: ...434 BigIron RX Series Configuration Guide 53 1001810 01 Displaying VSRP information 15 ...
Страница 566: ...494 BigIron RX Series Configuration Guide 53 1001810 01 QoS for the oversubscribed 16 x 10GE modules 18 ...
Страница 582: ...510 BigIron RX Series Configuration Guide 53 1001810 01 Viewing Layer 2 ACLs 20 ...
Страница 634: ...562 BigIron RX Series Configuration Guide 53 1001810 01 Troubleshooting ACLs 21 ...
Страница 642: ...570 BigIron RX Series Configuration Guide 53 1001810 01 Trunk formation 22 ...
Страница 746: ...674 BigIron RX Series Configuration Guide 53 1001810 01 Displaying RIP filters 24 ...
Страница 808: ...736 BigIron RX Series Configuration Guide 53 1001810 01 Displaying OSPF information 25 ...
Страница 926: ...854 BigIron RX Series Configuration Guide 53 1001810 01 Generalized TTL security mechanism support 26 ...
Страница 938: ...866 BigIron RX Series Configuration Guide 53 1001810 01 Displaying MBGP information 27 ...
Страница 950: ...878 BigIron RX Series Configuration Guide 53 1001810 01 Using secure copy 28 ...
Страница 988: ...916 BigIron RX Series Configuration Guide 53 1001810 01 Clearing IS IS information 29 ...
Страница 998: ...926 BigIron RX Series Configuration Guide 53 1001810 01 Configuring BFD for the specified protocol 30 ...
Страница 1014: ...942 BigIron RX Series Configuration Guide 53 1001810 01 Displaying multi device port authentication information 31 ...
Страница 1054: ...982 BigIron RX Series Configuration Guide 53 1001810 01 Sample 802 1x configurations 33 ...
Страница 1072: ...1000 BigIron RX Series Configuration Guide 53 1001810 01 IP source guard 35 Syntax show ip source guard ethernet port num ...
Страница 1108: ...1036 BigIron RX Series Configuration Guide 53 1001810 01 sFlow 39 ...
Страница 1190: ...1118 BigIron RX Series Configuration Guide 53 1001810 01 Displaying RIPng information 44 ...
Страница 1270: ...1198 BigIron RX Series Configuration Guide 53 1001810 01 Displaying ACLs 47 ...
Страница 1310: ...1238 BigIron RX Series Configuration Guide 53 1001810 01 Displaying OSPFv3 information 48 ...
Страница 1382: ...1310 BigIron RX Series Configuration Guide 53 1001810 01 Commands That Require a Reload D ...
Страница 1435: ...BigIron RX Series Configuration Guide 1363 53 1001810 01 VSRP E ...
Страница 1436: ...1364 BigIron RX Series Configuration Guide 53 1001810 01 VSRP E ...