5.2. Physical Ports Panel

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Fig. 5.6 Add ports to service

Drag and Drop the ports you want to use on to the right service.

Port Settings

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Fig. 5.7 Port Settings

  • Inter-Frame Gap

    Specifies the minimum gap between frames generated for a port, expressed as a number of bytes.

  • Speed Reduction

    Specifies an optional speed reduction on the transmit side of the port, expressed as a ppm value.

  • Enable PAUSE Mode

    Controls whether the port responds to incoming PAUSE frames.

  • Enable Auto-Negotiation

    Controls whether auto-negotiation for the port is enabled or not.

  • Latency Offset

    An optional offset in nanoseconds for the port which is used for latency measurements. You can measure an appropriate value for this by looping two test ports together and performing a latency test. The resulting average latency of this test should be zero. If this is not the case you can adjust the Latency Offset value until you reach a zero value. Then you can use the calibrated value in other tests.

IP Address

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Fig. 5.8 IP Address

Set the IP Address IPv4/IPv4 if this is a Layer 3 test.

Public IP Address

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Fig. 5.9 Public IP Address

  • Public IP Address

    If a port is located behind a NAT firewall/router it may be necessary to provide the public IP address offered by the NAT firewall/router.

    Xena1564 will then perform an ARP request for the public IP address before starting the test to avoid packet loss due to an initial ARP phase.The real (internal) IP address of the port must still be configured in the main port grid as this may be used to send Gratuitous ARP packets from the port to the router before starting the test.

  • Public IP Prefix

    The network prefix value for the public IP address.

Remote Loop IP Address

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Fig. 5.10 Remote Loop IP Address

When a port with layer-3 protocol segments (IPv4/IPv6) has been configured as a looped port you must specify the IP address of the remote port so that the Xena tester can perform an ARP request for the MAC address.