Agent communication parameters

This panel defines how client agents determines which relay agent to use for all communication.

Overview

There are two basic modes:

  • Static Relay: clients always use the selected relay and do not attempt communication with another relay. This is typically used for smaller LAN environments that do not use many relays.
  • Auto-select Relay: clients attempt to find a relay using one or more of the selected methods in the order defined below: if a method cannot find the relay, it returns and the next method in the list is tried.

Configuring Auto-select Relay

It is advised to use the DHCP method first in well-configured DHCP environments, by adding a new extended option that provides the relay information.

Another common primary method is the Relay List which is hosted on the one or more relay servers and allows mapping of IP subnets to relays. These can be well complemented by the Static Relay or Backup Relay as secondary methods (that is, if DHCP and Relay List were not able to find a suitable relay, a list of backup or a static relay is used). 

Relay ListIn the Relay List Server method, you can configure multiple relay servers. Client devices try to connect to a relay server, get the relay list from the server, and use the list to establish connection with a relay server. The relay server order is important because clients connect to the first relay server defined on the list and move sequentially till the end of the list.

Backup Relay: Is also well suited for agents that connect through the internet and do not have access to DHCP or the master server. In this case, one or more Internet facing relays can be added to the backup relays. 

Auto-discovery: Lets client agents perform a network scan on either a pre-defined range of IP addresses or a number of neighbors surrounding their IP address. This has to be used cautiously as it creates network traffic and requires good configuration so agents efficiently find their relays. 

Custom Script:  Is used when none of the built-in methods mentioned above fits the environment and a customized script is available to handle relay discovery.

Parameter

Description

Port

The TCP port number of the parent on which it communicates with its children.

Console Port

The number of the port that the console uses for communication with the agent.

Parent Name

The name of the direct parent to which the target device is to be connected. This is either the master or the new device's relay on the next higher level. The name may be entered as the short or long network name, that is, scotty or scotty.enterprise.com or as its IP address in dotted notation, that is, 192.168.1.1 or 2001:db8:85a3::8a2e:370:7334 . You may also select the parent from the list of available devices by clicking the Add Device icon and selecting the desired parent from the appearing list.

Parent Port

The port number of the direct parent to which the device is connected.

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