3com S7906E Guide De Référence

 

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By default, the maximum size of join/prune messages is 8,100 bytes.  

Related commands: jp-queue-size.  

# Set the maximum size of join/prune messages to 1,500 bytes in the public instance.  

<Sysname> system-view 

[Sysname] pim 

[Sysname-pim] jp-pkt-size 1500 

jp-queue-size queue-size 

Public instance PIM view, VPN instance PIM view 

2: System level 

queue-size: Maximum number of (S, G) entries in a join/prune message, in the range of 1 to 4,096.  

Use the jp-queue-size command to configure the maximum number of (S, G) entries in a join/prune 

message.  

Use the undo jp-queue-size command to restore the system default.  

By default, a join/prune messages contains a maximum of 1,020 (S, G) entries.  

When you use this command, take the following into account: 

z 

The size of the forwarding table. In a network that does not support packet fragmentation, if you 

configure a large queue-size, a join/prune message may contain a large number of groups, causing 

the message length to exceed the MTU of the network. As a result, the products that do not support 

fragmentation will drop the join/prune message.  

z 

The (S, G) join/prune timeout time on the upstream device. If you configure a small queue size, the 

outgoing interface of the corresponding entry may have been pruned due to timeout before the last 

join/prune message in a queue reaches the upstream device.  

Related commands: jp-pkt-size, holdtime join-prune, pim holdtime join-prune. 

# Configure a join/prune messages to contain a maximum of 2,000 (S, G) entries in the public instance.  

<Sysname> system-view 

[Sysname] pim 

[Sysname-pim] jp-queue-size 2000