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IOC to NPC Mapping

An Input/Output card (IOC) to Network Processing Card (NPC) mapping requires you to map one IOC to one NPC. However, you can map multiple IOCs to a single NPC. To balance the processing power in the NPC on the SRX 3400 and SRX 3600 services gateways, the chassis process (daemon) runs an algorithm that performs the mapping. It maps an IOC to an NPC that has the least amount of IOCs mapped to it. You can also use the command line interface (CLI) to assign a specific IOC to a specific NPC. When you configure the mapping, the chassis process will first use your configuration, then apply the least-number NPC algorithm for the rest of the IOCs.

You can configure the IOC to NPC mapping using the following example:


            
               set chassis ioc-npc-connectivity {
               
                  
                     ioc slot-number npc (none | slot-number);
                     
                  
               
               }

The set chassis ioc-npc-connectivity options are described in Table 5:

Table 5: IOC to NPC Connectivity Options

Option	Description
ioc slot-number	Specify the IOC slot number. Range is 0 through 7 for SRX 3400 devices and 0 through 12 for SRX 3600 devices.
npc slot-number	Specify the NPC slot number. Range is 0 through 7 for SRX 3400 devices and 0 through 12 for SRX 3600 devices.
none	The chassis process maps the connection for the particular IOC.

Note: You must restart the chassis control after you commit the set chassis ioc-npc-connectivity CLI command.

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