Technical data

4. Packages
BRIDGE_DEV_x_PRIORITY Default: BRIDGE_DEV_x_PRIORITY=”
This setting is optional and can also be completely omitted.
Only valid if BRIDGE_DEV_x_STP=’yes’ is set!
Which priority has this bridge? The bridge with the lowest priority wins the main bridge
election. Each bridge should have a different priority. Please note that the bridge with
the lowest priority should also have the biggest available bandwith because in addition
to the complete data traffic control packets will be sent by it every 2 seconds. (See also:
BRIDGE_DEV_x_HELLO)
Valid Values are from ’0’ to ’61440’ in steps of 4096.
BRIDGE_DEV_x_FORWARD_DELAY Default: BRIDGE_DEV_x_FORWARD_DELAY=’15’
This setting is optional and can also be completely omitted.
Only valid if BRIDGE_DEV_x_STP=’yes’ is set!
If one connection of the bridge was deactivated or if a connection is added to the bridge it
takes the given time in seconds 2 until the connection can send data. This parameter
is crucial for the time the bridge needs to recognize a dead connection. The time period
is calculated in seconds with this formula:
BRIDGE_DEV_x_MAX_MESSAGE_AGE 2 BRIDGE_DEV_x_FORWARD_DELAY
In standard values this means: 20 2 15 50 seconds. The time to recognize a dead
connection can be minimized if BRIDGE_DEV_x_HELLO is set to 1 second and BRIDGE_DEV_x_FORWARD_DELAY
is set to 4 seconds. In addition BRIDGE_DEV_x_MAX_MESSAGE_AGE has to set to 4 seconds.
This leads to: 4 2 4 12 seconds. This is as fast as it can get.
BRIDGE_DEV_x_HELLO Default: BRIDGE_DEV_x_HELLO=’2’
This setting is optional and can also be completely omitted.
Only valid if BRIDGE_DEV_x_STP=’yes’ is set!
The time mentioned in BRIDGE_DEV_x_HELLO is the time in seconds in which the so-called
’Hello-message’ is sent by the main bridge. These messages are necessary for STP’s
automatic configuration.
BRIDGE_DEV_x_MAX_MESSAGE_AGE Default: BRIDGE_DEV_x_MAX_MESSAGE_AGE=’20’
This setting is optional and can also be completely omitted.
Only valid if BRIDGE_DEV_x_STP=’yes’ is set!
The maximum time period the last ’Hello-message’ stays valid. If no new ’Hello-message’
is received during this period a new main bridge election will be triggered. This is why
this value should never be lower than 2 BRIDGE_DEV_x_HELLO.
BRIDGE_DEV_x_DEV_x_PORT_PRIORITY Default: BRIDGE_DEV_x_DEV_x_PORT_PRIORITY=’128’
This setting is optional and can also be completely omitted.
Only valid if BRIDGE_DEV_x_STP=’yes’ is set!
Only relevant if multiple connections with the same BRIDGE_DEV_x_DEV_x_PATHCOST have
the same destination. If this is the case the connection with lowest priority will be chosen.
Valid values are ’0’ to ’240’ in steps of ’16’.
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