Configuration Guide for Cisco Optical Site Manager, IOS XR Release 26.x.x

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Configuration Guide for Cisco Optical Site Manager, IOS XR Release 26.x.x

Retrieve MAC addresses through lldp

Updated: October 14, 2026

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Use this procedure to retrieve MAC addresses through LLDP in Cisco Optical Site Manager. Use it to complete the workflow and verify the result in the related Cisco Optical Site Manager page.

Use this task to retrieve MAC addresses through lldp.

Use this task to retrieve the source MAC address of the host connected to the 100GE or 400GE ports of 1.2T-MXP card, after a Link Layer Discovery Protocol (LLDP) packet is received on the client port.

Before you begin

Follow these steps to retrieve MAC addresses through lldp.

Procedure

  1. Click the Maintenance > LLDP tabs.

  2. Click Refresh.

    The table displays the following fields:

    • Port―Displays the port number.

    • Source MAC Address―Displays the MAC address of the node to which the port is connected.

The retrieve MAC addresses through lldp task is complete.

Limitations of lldp support on the 1.2T-MXP card

The LLDP support on the 1.2T-MXP card has the following limitations:

  • The 1.2T-MXP card can handle only one LLDP packet of 2000byte size per client every four seconds.

  • LLDP packet is not detected when the client ports if moved to from IS to OOS.

  • After the trunk port transits from OOS to IS, there is a delay of 12 to15 seconds to detect the LLDP packet and display it on the GUI.

  • LLDP capture does not happen when CFP2 DCO associated with the client port is not plugged in.

  • The 1.2T-MXP card captures the LLDP packets only when:

    1. The value of ETH TYPE header is 0x88CC.

    2. The destination Multicast addresses are:

      • 01:80:C2:00:00:00

      • 01:80:C2:00:00:0e

      • 01:80:C2:00:00:03