25.2.2 Configuring OADP

<Structure of this section>

(1) OADP function settings

Points to note

Configuration of OADP requires enabling of OADP for the entire device, and then enabling of OADP for the port for which it will be used.

If the port for which OADP will be used is a member of a link aggregation, enable the functionality for the relevant port channel interface.

The example below enables OADP for gigabitethernet 1/0/1.

Command examples

(config)# oadp run

Enables OADP for the entire device.
(config)# interface gigabitethernet 1/0/1

Switches to the Ethernet interface configuration mode for port 1/0/1.
(config-if)# oadp enable

Initiates operation of OADP on port 1/0/1.

Notes: The OADP operates only on active VLANs for the port. It does not operate on suspended VLANs.

Points to note: How often neighboring device information is updated can be adjusted by changing the interval for sending OADP frames. If the interval is decreased, the information is updated more often, but the load on the local and neighboring devices might increase. If the interval is increased, the load might decrease, but the information is updated less often. Normally, you do not change this setting.

Command examples

(config)# oadp interval-time 60

Sets 60 seconds as the interval for sending OADP frames.
(config)# oadp hold-time 180

Sets 180 seconds as the time during which the information sent from the Switch will be retained on the neighboring devices.

Points to note

If the CDP reception functionality is enabled, it operates on all ports on which OADP is operating.

In this example, the CDP reception functionality operates on gigabitethernet 1/0/1.

Command examples

(config)# interface gigabitethernet 1/0/1

Switches to the Ethernet interface configuration mode for port 1/0/1.
(config-if)# oadp enable

Enables OADP for port 1/0/1.
(config-if)# exit

Changes the mode from Ethernet interface configuration mode to global configuration mode.
(config)# oadp cdp-listener

Enables the CDP reception functionality. The CDP reception functionality starts on the ports on which OADP is operating.

Points to note: For a trunk port to which multiple VLANs belong, OADP sends and receives multiple OADP frames through the port by using VLAN tags. If the number of VLANs that belong to the port increases, the amount of neighboring device information also increases, adding to the load on the devices. The device load can be reduced by setting some of the VLANs to ignore received OADP frames.

Command examples

(config)# oadp ignore-vlan 10-20

OADP frames received by VLAN10~20 are ignored.