Customer Service Center

• Spirent TestCenter
• All Versions
• ARP
• Gratuitous ARP

Create a Raw StreamBlock as shown below:

• Set auto length and remove signature

• Delete the existing IPv4 header.

• Add the ARP header.

• Fill in the fields as shown below.
  • ​​Ethernet MAC = Sender Hardware Address
  • can be either ARP Request or ARP Reply
  • Sender Protocol Address = Target Protocol Address (this should be the gateway address that is having its mac changed)
  • Target Hardware Address can be either all zeros (00:00:00:00:00:00) or all ffs (FF:FF:FF:FF:FF:FF)

• If you need to send gratuitous ARP from many devices, we can add modifiers as shown below.

• Sample configuration file and the corresponding packet capture is attached. (click here for sample video)

• The streamblock may not change its destination MAC if there is a Device on the same subnet/vlan with the "Resolve IPv4 Gateway MAC Address" disabled.
  • The issue seems to be tied to both the Resolve MAC and also the Enable Ping option.
  • There is no open CR for this. Simply enabling "Resolve IPv4 Gateway MAC Address" should fix the issue.