Routing and WAN connections
420
11.8
Load balancing
BAT54-Rail/F..
Release
7.54
06/08
When using channel bundling, the configured MAC address is used
for the first connection, for all other bundle connections the locally
managed MAC addresses based on the user-defined MAC address
will be calculated.
If one of your connections is charged via the MAC address, configure
this MAC address for the separately charged connection only. For all
other connections you should use another address.
11.8.2 Direct DSL channel bundling
For the bundling of DSL connections, the DSL ports to be used are entered
into the DSL-Broadband-Peers list. Only the number of DSL ports is entered,
separated by commas if multiple ports are used (1,2,4) or as a range (1-4).
All that is required for PPPoE bundling is to activate bundling in the relevant
layer and to use the port list to assign the relevant ports.
11.8.3 Dynamic load balancing
If the Internet provider does not directly support bundling, then multiple nor-
mal DSL connections can be coupled with a load balancer. First of all, the
DSL accesses are set up for the necessary DSL ports. These are then cou-
pled with a load-balancing table. This list assigns a virtual balancing connec-
tion (the connection that is entered into the routing table) to the other real
DSL connections (bundle connections). Depending on the number of avail-
able DSL ports, several bundle connections can be assigned to one balanc-
ing connection.
Note: The balancing connection is entered as a "virtual" connection. No ac-
cess data or similar has to be entered for this connection. The entry mere-
ly serves as a "distributor" which uses the load-balancing table to assign
several "real" bundled connections to an entry in the routing table.
Note: DSL bundling is a static bundling. Any additional channels are not
opened or closed according to the demand from data transfer volumes.
With load balancing, decisions about the routing of data packets can no long-
er be made simply based on the IP addresses because the individual bun-
dled DSL connections all have different IP addresses. Thus load balancing
also considers the information in the firewall connection list. This list has an
entry for every established TCP connection, and for load balancing the list is
supplemented with information about the DSL port used.
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