WATERS NETWORK SYSTEMS
™ ProSwitch
®
-
2600M User’s Manual
Page
26
Logical Port
The
Logical Port
function from the
QoS Setup
menu allows you to configure the QoS operation of different
TCP/IP logical (service) ports. There are three types of logical ports can be configured:
User-Defined Port
- Eight user-defined TCP/IP logical ports can be set for the
User-Defined
Port QoS
operation. Once you select a logical port and assigned a TCP/IP port number, you can configure the
following:
o
Enable / Disable it.
o
Configure the drop rate to high drop rate or low drop rate.
o
Configure the transmit priority to 0 ~ 7.
Well-Known Port
– Eight well-known ports can be set for the
Well-Known Port
QoS. Once you select a
port, you can configure the following:
o
Enable / Disable it.
o
Configure its drop rate to high drop rate or low drop rate.
o
Configure its transmit priority to 0 ~ 7.
The following chart shows an example of how well-known ports may be used:
Well-Known Port Service
Well-Known Port Service
23 Telnet
111
SUN
rpc
512
TCP/UDP
22555
IP phone call
6000 XWIN
22
SSH
443 HTTP
554 RTSP
Range Port
– The Range Port setting allows you to define the drop priority and transmit priority for some
range of TCP/IP logical ports.
VLAN
The
VLAN Index
from the
QoS Setup
menu allows you to configure the drop priority and transmit priority for
each priority value in VLAN tag. Select a priority index and configure the QoS setting for this priority.
ToS
The
ToS Index
from the
QoS Setup
allows you to configure the drop priority and transmit priority for each
priority value in ToS. Select a ToS priority index and configure the QoS setting for this priority. You can set Bit
0-2 or Bit 3-5 of ToS for the transmit priority and drop priority setting with the
Global Setting
from the
QoS
Menu.
Profile
The 2600M supports eight scheduling configurations for each physical port on different priority queues (four
priority queues on 10/100M ports and eight priority queues on gigabit port).
Strict Priority (SP)
- SP is the highest priority queue in the switch. If there is only one frame in the queue
with SP, it will be transmitted first. The SP class is used for IETF expedited forwarding (EF), where
performance guarantees are required. The SP traffic should be either policed or implicitly bounded (e.g. if
the traffic of the queue with SP is very light and predictable patterned).
Delay Bound
– Delay bound a delay assurance algorithm of the switch. It can dynamically adjust its
scheduling and dropping criteria by the queue occupancies and the due dates of their head-of-line (HOL)
frames. As a result, latency bounds for all admitted frames with high confidence is assured
Weighted Fair Queuing (WFQ)
- You can weight the priority queues for different transmit bandwidth
