25.1.3 Notes on using OADP

(1) When another device that does not support this function is connected between devices for which this function is set

If using a configuration described below, it is difficult to know the exact status of the connection between neighboring devices for the following reasons:

• If a switch is connected between neighboring devices, the information sent by OADP from one neighboring device is forwarded by the switch to the other neighboring device. In this case, the device that receives the information is unable to determine whether the received information is information about the other device or information about the switch.

• If a router is connected between neighboring devices, the information distributed over OADP from one device does not arrive at the other device, because the router discards the distributed information.

(2) Maximum number of neighboring devices

Up to 100 neighboring device information can be stored per switch. The distributed information about any devices exceeding the maximum is discarded. Note that the discarding of information is suppressed for a period of time to provide time within which the retention of saved information might time out. Note, however, that the maximum suppression time is the retention time for the neighboring device information to be discarded.

(3) VLAN of Ports Using OADP

OADP sends and receives OADP PDUs over the VLAN set for the port. If the VLAN is disabled by using the state suspend command, OADP does not operate over the VLAN.

(4) When connected to a device equipped with a CDP

When you connect the Switch to a device implementing CDP by using a trunk port, make sure that the native VLAN of the port is not disabled by using the state suspend command. If the native VLAN is disabled, the Switch discards CDP PDUs.

(5) When replacing L2 switchbetween devices with CDP and this device

When you replace with a Switch an L2 switch through which CDP PDUs pass between devices implementing CDP, do not use the oadp cdp-listener command to enable the CDP reception functionality of the Switch.If you enable the functionality, CDP PDUs do not pass through the Switch because they are received by the Switch.As a result, the devices implementing CDP no longer recognize each other. If you want CDP PDUs to pass through the new Switch (that is, you want the devices recognize each other) after replacement, do not enable the CDP reception functionality.

(6) Compatibility with VRF functions [SL-L3A]

IP addresses are not distributed when sending switch information to VLANs for which the VRF functionality is enabled.