RACOM RipEX 1.12.2, User Manual

Page: 135 / 189

Backup
RipEX is capable to test path between two RipEX IP addresses (even behind a repeater or LAN). When
the connection fails, RipEX automatically uses alternative gateway(s) defined in the Alternative paths
column with the priority according to the line sequence. The system always tries to use the route with
the highest priority, e.g. automatically switches back when the failed route starts to work.
Hello packets are used for path testing. Each direction (back and forth) is tested independently, i.e. the
routing can be non-symmetrical. Data in the transmitted Hello packet carry the information about received
Hello packets from the counterpart (Peer IP). The path is evaluated as the good one, when Hello
packets from counterpart (carried the info, that counterpart successfully received „my” Hello packets)
are received. i.e. each side decides itself which outbound route (gateway) will be used.
Backup path status is displayed: Up – green background, Down – red background, Unknown – yellow
background, Currently used – bold.
• Name
You can name Backup path as per your choice. The name can be up to 16 characters long (UTF8
is supported) for your convenience. (E.g. “Remote unit #1 etc.). Following characters are not allowed:
" (Double quote)
` (Grave accent)
\ (Backslash)
$ (Dollar symbol)
; (Semicolon)
• Peer IP
IP address of the RipEX (either its Radio or Ethernet interface) on the remote end of the Backup
path (Hello packet is sent there). Only RipEX IP of Radio or the main Ethernet interface can be
used, no Subnets.
Note: Do not forget to set correct routing to „Peer IP“ for Hello packets.
• Hysteresis [s]
Alterative path is kept for the time set in order to avoid chaotic switching among different paths under
unstable conditions.
• SNMP Trap
When ticked, SNMP Trap is sent whenever there is a change in the path status: Up, Down, Unknown,
Currently used.
• HW Alarm Output
Note: HW Alarm Output has to be enabled first, i.e. Settings/Alarm management/HW Alarm Output
must not be „Off“
When ticked , the HW Alarm Output contact on the Power connector is activated when the highest
priority Gateway of the respective Backup path fails. When the HW Alarm Output is ticked for multiple
Backups, it is activate while at least one of the highest priority Gateways is in the fail state
• Gateway
More Gateways (alternatives) can be defined for one Backup path. When the path using the first
(highest priority) Gateway fails, the next one (defined on the next line) is automatically used. Gateway
displayed in Bold is currently used.
• Policy
Policy defines the conditions for switching to the alternative gateway.
○ Parameters
List box: Default, Manual,
Default = Default
○ Default – Default (recommended) values are set and can not be edited.
135 © RACOM s.r.o. – RipEX Radio modem & Router
Advanced Configuration