Command Line Reference Guide

678 | Multicast
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As an Mtrace transit or intermediate router, FTOS returns the response to Mtrace queries. Upon
receiving the Mtrace request, FTOS computes the RPF neighbor for the source, fills in the request and
the forwards the request to the RPF neighbor. While computing the RPF neighbor, the static mroute
and mBGP route is preferred over the unicast route.
multicast-buffering enable
Enable buffering for all multicast traffic on the buffering unit.
Syntax
[no] multicast-buffering enable
Command Modes
CONFIGURATION
Command
History
Usage
Information
Use this command to enable backpressure messages for multicast traffic and allow the system to start
buffering multicast traffic. If multicast traffic is buffered for one group on any port, all multicast,
Destination Lookup Failure (DLF) and broadcast traffic is buffered. Note that multicast packets might
be dropped if either of the following occurs:
• continuous oversubscription at the egress
• if the packet is not drained for a long period because of slow draining rate at the egress port
compared to high ingress rate.
You must reboot the switch to enable the command on a standalone unit. Buffering multicast units is
not supported on stacked units.
Related
Commands
queue backplane multicast
e
Reallocate the amount of bandwidth dedicated to multicast traffic.
Syntax
queue backplane multicast bandwidth-percentage percentage
Parameters
Defaults
80% of the scheduler weight is for unicast traffic and 20% is for multicast traffic by default.
Command Modes
CONFIGURATION
Command
History
Version 8.3.3.8 Introduced on S60.
show hardware
stack-unit
Display the data plane or management plane input and output statistics
of the designated component of the designated stack member.
percentage
Enter the percentage of backplane bandwidth to be dedicated to multicast
traffic.
Range: 5-95
Version 7.7.1.0 Introduced on E-Series