C613-50631-01 Rev A Command Reference for IE340 Series 1794
AlliedWare Plus™ Operating System - Version 5.5.3-0.x
PIM-SM COMMANDS
IP
MULTICAST ALLOW-REGISTER-FRAGMENTS
ip multicast allow-register-fragments
Overview Use this command to allow PIM to register fragmented packets. It is disabled by
default.
Use the no variant of this command to stop PIM from registering fragmented
packets.
Syntax
ip multicast allow-register-fragments
no ip multicast allow-register-fragments
Default This command is disabled by default
Mode Global Configuration
Usage notes Most multicast streams are not fragmented, and therefore this command is
unnecessary. By default, when IP multicast packets are fragmented, the switch
attempts to reassemble them before registering the packets. This is necessary for
tasks such as network address translation, or a firewall.
However, reassembly may be difficult for switches where the CPU cannot handle a
large amount of traffic. In that situation, with the CPU failing to reassemble the
fragmented packets, there can be a delay in forwarding multicast streams.
We do not recommend enabling this feature if a firewall or network address
translation is being used. This feature should only be enabled if multicast data is
fragmented and the data rate is too high for the CPU to manage reassembly.
Example To allow PIM to register fragmented packets, use the commands:
awplus# configure terminal
awplus(config)# ip multicast allow-register-fragments
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