Relay-Information - Siemens SCALANCE XM-400 Configuration Manual

Simatic net industrial ethernet switches command line interface (cli)

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relay-information

With this command you define that devices with a certain remote ID and circuit ID are

assigned the IPv4 addresses from a specific address band.

If you create such an entry for an address band, address pool only reacts to DHCP queries

via a DHCP relay agent (option 82). You can create further address bands for the same

VLAN IP interfaces so that the pools react to different requests.

Extension or release of an IPv4 address assigned via a relay agent.

With address assignments via a relay agent "Renew" and "Release" messages going directly

from the client to the server are ignored by the server.

• The extension of the period for an IPv4 address assigned via a relay agent is achieved

using a "Rebinding" message that the client sends automatically as a broadcast.

• To speed up the release of an IPv4 address assigned via a relay agent, configure a

shorter period of validity with the

You are in the DHCPPOOL configuration mode.

The command prompt is as follows:

cli(config-dhcp-pool-<ID>)#

Call up the command with the following parameters:

relay-information <remote-id> <circuit-id>

The parameters have the following meaning:

Devices with a certain remote ID and circuit ID are assigned the IPv4 addresses from a

specific address band. Before the IPv4 address band can be used, it still needs to be

SCALANCE XM-400/XR-500 Command Line Interface (CLI)

Configuration Manual, 06/2016, C79000-G8976-C252-11

Remote ID of the device

Circuit ID of the device.

Range of values / note

Enter the remote ID of the de-

Enter the circuit ID of the de-

Network protocols

7.5 DHCP server