Bandwidth On Demand (Bod) - BinTec X4100 User Manual

7
Advanced Configuration of Basic Unit with the Setup Tool
Switching B-channels
in and out
186 BinTec Access Networks GmbH
7.2.3

Bandwidth on Demand (BoD)

This function permits dynamic bundling of leased lines with dialup lines to cope
with large amounts of data. You have the following options:
BOD for leased lines, i.e. dynamic connection of one or more dialup con-
nection(s) to the existing leased line, if required.
BOD for dialup connections, i.e. dynamic connection of one or more dialup
connection(s) to the existing dialup connection, if required.
Backup for leased lines, i.e. establishing a dialup connection when the
leased line to the partner fails. BOD also acts if the leased line fails (i.e. oth-
er dialup connections can be switched in), if more than one additional chan-
nel was allowed in the configuration (Maximum Number of Dialup
Channels > 1 ).
The use of the B-channels is controlled by the data throughput or by application-
controlled bandwidth management (Bandwidth on Demand).
First B-channels can be added as soon as the bandwidth of the D-channel is no
longer sufficient for data transmission. Data transmission then takes place ex-
clusively in the B-channels (Dynamic ISDN). A B-channel is added if the current
data utilization of the relevant interface to the connection partner is 90 % or
more of the maximum permissible utilization for at least five seconds. The per-
centage utilization of the bundle assuming a B-channel is dropped is calculated
from the measured utilization. A B-channel is dropped if the calculated value
stays below 80 % of the maximum permissible utilization of the remaining chan-
nels for 10 seconds.
Second the application-controlled addition of B-channels for
filters and rules can be configured in a similar way to access lists for IP packets.
You will find a description of the configuration in
Both throughput-controlled and application-controlled bandwidth management
uses the Bandwidth Allocation Control Protocol (BACP/BAP to RFC 2125) for
agreeing with the remote terminal on the circumstances under which B-chan-
nels are to be added or dropped. The use of BACP/BAP is agreed during the
initial connection setup.
Static or dynamic short hold (see
chapter 7.2.5, page
"Defining Short Hold", page
X4100/200/300 via
198.
154) may also