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Each link is referred to using a unique ID which is the Link_ID. Each interface of a device has a unique ID which is the Interface_ID. For Eg: If a router is connected to three devices, it will have three interfaces each referred using a unique ID.

The properties of links can be accessed from the NETWORK variable as follows:
NETWORK->ppstruNetSimLinks[LINK_ID]

Where, 

LINK_ID is the unique ID of a link

The properties of each interface of a specific device can be accessed from the NETWORK variable as follows:

NETWORK->ppstruDeviceList[DEVICE_ID]->ppstruInterfaceList[INTERFACE_ID]

Where,

DEVICE_ID is the unique ID of the device for which the interface details needs to be accessed

INTERFACE_ID is the unique ID of the interface of device with ID DEVICE_ID which is to be accessed

NOTE: Examples provided may vary for different releases of NetSim. Please follow the steps mentioned under the applicable release.

For examples related to accessing links and interface properties, refer the function: fn_NetSim_RIP_Update_Timer() 

file: UpdateTimer.c

Project: Routing

For examples related to accessing links and interface properties, refer the function: fn_NetSim_OSPF_LSUpacketformation() 

file: SendLSU.c

Project: Routing 

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