Routing and WAN connections
BAT54-Rail/F..
Release
7.54
06/08
11.8
Load balancing
419
D To configure channel bundling for an internal ADSL interface, the
ADSL port '0' is entered into the list of ports at the top of the list (e.g.
'0,1,2,3' as port list or '0-3' as port range). In the remote device, the
communications layer must be set to Layer 1 'AAL-5'.
Note: An entry in the peer list can contain various ports (e.g. ADSL and Eth-
ernet), but it can only reference one communications layer in which just
one layer-1 protocol can be defined. For bundled communications over
ADSL and Ethernet ports, however, two different layer-1 protocols are re-
quired. For this reason, layer 1 is set to 'AAL-5' in these cases. As only
one ADSL interface can exist in the devices, all of the interfaces bundled
into this are automatically changed to layer 1 with 'ETH' for Ethernet DSL
ports. This automatic change of the layer can only succeed if the ADSL
interface is the first one to be selected for bundled connections.
D For devices with a built-in ADSL modem and an additional Ethernet in-
terface (DSL or DSLoL), it is clear which ports are used for bundling.
In this case it is not necessary to enter the ports into the peer list.
These devices always internally assume a port list '0,1' so that the in-
ternal ADSL interface is the first one to be used for bundling.
Note: For Multi-PPPoE (’Direct DSL channel bundling’ → page 420), multi-
ple PPPoE connections share one physical DSL connection. With Multi-
DSL, several PPPoE connection are divided between the available DSL
interfaces. The maximum possible number of parallel connections is lim-
ited to 8 channels.
U Allocation of MAC addresses to the DSL ports
If a BAT uses switch ports to gain access to multiple DSL(WAN) interfaces,
an appropriate number of MAC addresses must be used to differentiate the
DSL ports. As there are cases where the required MAC address depends
upon the remote station which, for example, uses the MAC address to deter-
mine the DSL access charge, the MAC addresses are defined for the logical
DSL remote stations and not for the physical DSL ports.
The following options are available for setting the MAC address:
D Global: Global system MAC address
D Local: The unique, locally managed MAC address is calculated from the
global address
D User defined: A MAC address that can be freely defined by the user
Note: Every DSL connection contains its own MAC address. If two remote
stations are configured with identical MAC addresses, the first connection
uses the configured MAC address. For the second connection a "locally
managed", unambiguous MAC address will be calculated from the user-
defined MAC address.
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