
Industrial Managed
Ethernet Switch
User Manual
錯誤
!
使用
[
常用
]
索
引標籤將
Heading
1,Product Manual
套用到您想要在此處
顯示的文字。
Page
53
of
191
DiffServ allows compatibility with legacy routers, which only supports IP Precedence, since it uses the DiffServ
Code Point (DSCP), which is the combination of IP precedence and Type of Service fields
.
TOS (Type of Service) of the switch can be configured with the default queue weights as shown in Figure 2.57.
Note that the TOS consists of DSCP (Differentiated Service Code Point (6 bits)) and ECN (Explicit Congestion
Notification (2 bits)). The users can assign TOS values (
DSCP
) to predefined queue types (
Priority
) manually using
DSCP Mappingwebpage in Figure 2.57. The priority queue number can be between Q0 to Q7 where the queue
number 7 is the highest priority and 0 is the lowest priority. After assigning any new priority to a DSCP, please click
the
Update
button at the bottom of the page to allow the new mapping to take effect.
Figure 2.57 Mapping Table of DSCP and ECN Webpage
2.4.2
Storm Control
This subsection provides the storm control or storm filter features of the managed switch
.
Storm control prevents
traffic on a LAN from being disrupted by ingress traffic of broadcast, multicast, and destination lookup failure (DLF)
on a port. Figure 2.58 depicts the Strom Control webpage. The users can impose the same limiting parameters on
all ports at the same time by clicking on the box in front of the
all
line and set the storm control data rate under
limiting column. The storm control limiting can also be independently control on each port for DLF, Multicast, and
Broadcast by checking on the corresponding box
.
Note that the limiting value of 0 means that the storm control is