Hirschmann BAT54-F Series User Manual

Routing and WAN connections
BAT54-Rail/F..
Release 7.54 06/08
11.8 Load balancing
421
U Connection establishment
A request for data transmission to a balancing remote station initially prompts
the first bundle connection from the load balancing table to be established.
Further progress depends upon the success of this connection establish-
ment:
D If the connection is successfully established, the first step is the assign-
ment of all pending TCP connections to this channel. Subsequently, all of
the configured bundle connections will successively be established. As
soon as at least two bundle connections are active, new TCP connections
will be divided among the active bundle connections.
D Should establishment of the bundling connection fail, then attempts will be
made to establish other bundle connections one after the other. As soon
as one of the bundle connections is established, all of the pending TCP
connections will be directed to this channel.
U Spreading the data load
Two basic methods are available for balancing the data load:
D If the channel's bandwidth is known, then the connections will be as-
signed to the channel with the lowest workload (in percent).
D If the bandwidth is not known, then a differentiation is made according to
the type of connection required; a TCP connection; or VPN or PPTP con-
nections from the BAT.
D If a TCP connection requests a channel, then the one with the lowest
absolute workload will be chosen.
D If a VPN or PPTP connection requests a channel, then the connec-
tions will be equally spread between all available channels.
Note: For the most effective use of load balancing, the bandwidth should be
entered into the list of WAN interfaces under LANconfig in the configura-
tion area 'Interface' on the 'WAN' tab under the button Interface settings
(Telnet:
/Setup/Interfaces/DSL , WEBconfig: Expert configuration 
Setup
 Interfaces DSL).
11.8.4 Static load balancing
Apart from the dynamic choice of connection outlined in the previous section,
there are possible scenarios where certain TCP connections should always
make use of the same DSL connection. Two cases are to be considered
here:

Hirschmann BAT54-F Series Specifications

General

Brand	Hirschmann
Model	BAT54-F Series
Category	Wireless Access Point
Language	English