This allows the session to be assigned to a speed lane. A speed lane is a single pipe which has limited throughput. The lane can be set to any number of Kb/s (kilo bytes per seconds) for traffic to the WAN or LAN. Traffic is placed in a speed line by a set of rules, the first match applying.
| Security | Who can view/edit this entry |
| Name | Name this shaping rule |
| Direction | What direction the traffic is going in.
Can be multiple selection. |
| Both ways | Indicates that the rule applies both ways (see below) |
| Lane | Which speed lane the traffic goes in to |
| Protocol | Specific protocols that apply |
| Source IP | The range of source IPs - blank for any |
| Source port | The range of source ports - blank for any
This does not normally need setting as the source port is not normally relevant |
| Target IP | The range of target IPs - blank for any |
| Target port | The range of target ports - blank for any |
| Profile | When the rule applies |
The format is very similar to the filtering tables except that a speed lane is selected and there is an option to set "both ways".
Speed is limited using packet scheduling which provides a smooth throughput at the requires speed. Setting a speed lane does not guarantee a minimum speed, it limits to a maximum.
Selecting "Both ways" creates two lane controls - one of which is as shown, and one is the reversal of the Direction and Source/Target IP addresses. Note that the ports are not reversed.
The direction (from/to) relates to the way the session is created - i.e. the first packet.
Unlike filters, you can change the speed and change the rules for controlling the speed lanes at any time and this will have an immediate effect on existing sessions. You can make speed rules dependant on a profile so that changes happen automatically at certain times.
Each speed lane has limits on bandwidth to the Lan and to the WAN. You can also set a lane/direction to give away unused bandwidth, and also to take unused bandwidth from those lanes that give it away. There is also a FastACK feature for advanced users (see the technical rteference manual for more details).
The first speed lane is a master speed lane, which is applied after
any other speed lane selected. This allows you to limit the overall speed
of all traffic.