Wieland wienet v3, Руководство пользователя

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Contents of Package
Wieland Electric GmbH | BA001039 (Rev. A) | 08/2016
26
5.2 VRRP Configuration
Select the VRRP menu item to enter the VRRP configuration. VRRP protocol (Virtual Router Redundancy
Protocol) allows you to transfer packet routing from the main router to a backup router in case the main
router fails. (This can be used to provide a wireless cellular backup to a primary wired router in critical
applications.) If the
Enable VRRP
is checked, you may set the following parameters.
Item Description
Virtual Server IP Address This parameter sets the virtual server IP address. This address must be
the same for both the primary and backup routers. Devices on the LAN
will use this address as their default gateway IP address.
Virtual Server ID This parameter distinguishes one virtual router on the network from
another. The main and backup routers must use the same value for
this parameter.
Host Priority The active router with highest priority set by the parameter Host Prior-
ity, is the main router. According to RFC 2338, the main router should
have the highest possible priority – 255. The backup router(s) have a
priority in the range 1 – 254 (default value is 100). A priority value of 0
is not allowed
VRRP configuration
You may set the Check connection flag in the second part of the window to enable automatic test mes-
sages for the cellular network. In some cases, the mobile WAN connection could still be active but the
router will not be able to send data over the cellular network. This feature is used to verify that data can
be sent over the PPP connection and supplements the normal VRRP message handling. The currently ac-
tive router (main/backup) will send test messages to the defined
Ping IP Address
at periodic time inter-
vals
(Ping Interval)
and wait for a reply
(Ping Timeout
). If the router does not receive a response to the
Ping command, it will retry up to the number of times specified by the
Ping Probes
parameter. After that
time, it will switch itself to a backup router until the PPP connection is restored.
Item Description
Ping IP Address Destinations IP address for the Ping commands. IP Address can not be
specified as a domain name.
Ping Interval Interval in seconds between the outgoing Pings.
Ping Timeout Time in seconds to wait for a response to the Ping.
Ping Probes Maximum number of failed ping requests
Check connection
Note!
You may use the DNS server of the mobile carrier as the destination IP address for the test
messages (Pings).
The
Enable traffic monitoring
option can be used to reduce the number of messages that are sent to test
the PPP connection. When this parameter is set, the router will monitor the interface for any packets dif-
ferent from a ping. If a response to the packet is received within the timeout specified by the
Ping
Timeout
parameter, then the router knows that the connection is still active. If the router does not receive
a response within the timeout period, it will attempt to test the mobile WAN connection using standard
Ping commands.
NOTE