Chapter 9: Quality of Service LANCOM Reference Manual LCOS 3.50
187
Quality of Service
A maximum bandwidth is simply defined by a limit rule, which discards by a
“Drop” action all packets, which exceed the defined bandwidth.
Examples:
%Qcds32: Minimum bandwidth of 32 kbps for each connection
%Lgds256 %d: Maximum bandwidth of 256 kbps for all connections
(globally)
Further information about defining Firewall rules can be found in
chapter ’Firewall’ →page104.
9.7.3 Adjusting transfer rates for interfaces
Devices with built-in ADSL/SDSL modem resp. with an ISDN adapter
make these settings independently for the respective interface. For a
LANCOM model with Ethernet and ISDN interface, these settings
have to be made solely for the Ethernet interface.
LANconfig Data rate restrictions for Ethernet, DSL and DSLoL interfaces are entered in
LANconfig under configuration field 'Management' on index card 'Interfaces'
within the settings for the different WAN interfaces:
An Ethernet WAN (DSL/cable) and DSLoL interface can be switched off
completely in this dialogue.
As upstream and downstre am rate the gross dat a rates are entered, whi ch
are usually a little bit higher than the net data rates indicated by the pro-
vider as the guaranteed data rate (see also ’The queue concept’
→page172) .
The “external overhead” considers information added to the packets dur-
ing the data transfer. Concerning applications with small data packets