Multicast Rate Limiting - Dell 53-1002116-01 Administrator's Manual

2. Specify the 10-gigabit Ethernet interface.
3. Enable an Ethernet PFC on the interface.
4. Enter the copy command to save the running-config file to the startup-config file.

Multicast rate limiting

Multicast rate limiting provides a mechanism to control multicast frame replication and cap the
effect of multicast traffic.
Multicast rate limit is applied to the output of each multicast receive queue. You can set policies to
limit the maximum multicast frame rate differently for each traffic class level and cap the total
multicast egress rate out of the system.
Multicast rate limiting includes the following features:
•
•
Creating a receive queue multicast rate-limit
To create the receive queue multicast rate-limit, perform the following steps from Privileged EXEC
mode.
1. Enter global configuration mode.
2. Create a lower maximum multicast frame expansion rate. In this example, the rate is to 10000
Dell Converged Enhanced Ethernet Administrator's Guide
53-1002116-01
switch(config)#interface intengigabitethernet 0/2
switch(conf-if-te-0/2)#qos flowcontrol pfc 3 tx on rx on
The following example enables an interface 802.3x Pause flow control TX and RX.
switch:admin>cmsh
switch>enable
switch#configure terminal
Enter configuration commands, one per line.
switch(config)#interface intengigabitethernet 0/2
switch(conf-if-te-0/2)#qos flowcontrol pfc 3 tx on rx on
switch(conf-if-te-0/2)#exit
switch(config)#end
switch#copy running-config startup-config
All configuration parameters are applied globally. Multicast rate limits are applied to multicast
receive queues as frame replications are placed into the multicast expansion queues. The
same physical queues are used for both ingress receive queues and egress receive queues so
rate limits are applied to both ingress and egress queueing.
Four explicit multicast rate limit values are supported, one for each traffic class. The rate limit
values represent the maximum multicast expansion rate in packets per second (PPS).
switch#configure terminal
PPS.
switch(config)#qos rcv-queue multicast rate-limit 10000
The following example creates a lower maximum multicast frame expansion rate to
10000pkt/s.
switch:admin>cmsh
switch>enable
switch#configure terminal
Multicast rate limiting
End with CNTL/Z.
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