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2.5.11 SNMP
Simple Network Management Protocol (SNMP) is an application layer protocol used to
manage and monitor TCP/IP-based devices. SNMP is used to exchange management
information between the network management system (NMS) and a network element (NE).
A manager station can manage and monitor the WLAN Residential Gateway through the
network via SNMP version one (SNMPv1), SNMP version 2c.
SNMP:
Enable or Disable SNMP service.
SNMP Read Community:
Specify the Read Community.
SNMP Write Community:
Specify the Write Community.
SNMP Trap Host:
Specify the SNMP trap host (IP address) to which trap messages will be
sent.
SNMP Trap Community:
Specify the Trap Community.
SNMP Power Down Trap:
If enabled, a trap or notice will be sent when power supply is
down.
2.6 Switch Management
In this section, users can setup several advanced features. Select
Switch Management
from the
Main Menu
, the sub-items
–
Port Configuration
,
Bandwidth Control
,
Configure
VLAN
and
IGMP Snooping
–
will show up.
2.6.1 Port Configuration
Select
Port Configuration
from the
Switch Management
menu,
then
Port Configuration
screen page appears.
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37
Port State:
Enable or disable the status of each port.
Port Type:
Each port
’
s Auto-Negotiation configuration.
Port Speed:
Each port
’
s speed configuration (10/100Mbps).
Duplex:
Each port
’
s Duplex configuration.
Flow Control:
Each port
’
s flow control configuration.
MDI/MIDX:
View-only field (always auto).
Click the
“
Edit
”
button on the port that you would like to make some changes. When the
selected port is highlighted in blue, users can make some changes by selecting from the
pull-down menu.
Click the
“
Change
”
button to apply the changes.
2.6.2 Bandwidth Configuration
Select
Bandwidth Configuration
from the
Switch Management
menu,
then
Bandwidth
Configuration
screen page appears.
Bandwidth Range:
There are 3 different bandwidth ranges in drop-down menu for selection:
1024k~100M (Min. unit size 1024k), 64K~100M (Min. unit size 128k) and 16K~32M (Min.
unit size 16k). If you select
“
1024k~100M (Min. unit size 1024k)
”
, the minimum bandwidth
that can be entered and bandwidth range for Egress and Ingress traffic is 1024. For
example, if you enter a value that is lower than 1024k or higher than 1024k but lower than
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38
2048k, then the bandwidth will be adjusted to 1024k automatically.
The next bandwidth that
can be used is 2048k.
2.6.2.1 Egress Bandwidth Control
There are six modes in the drop-down menu for selection:
OFF/ By Port Only/ By Port with
Queue/ By DSCP/ By 802.1p
/
By Application
. Except
“
OFF
”
mode, the advanced
configurations will be displayed when the appropriate mode is selected according to the
network application with this gateway installed.
2.6.2.1.1 By Port Only
Selecting
“
By Port Only
”
enables users to allocate transmission bandwidth to each LAN and
WAN port.
NAT Download & Upload Stream:
These two ports determine bandwidth for downstream
traffic and upstream traffic for ports assigned in NAT mode.
Bandwidth:
Specify reserved bandwidth for each port.
2.6.2.1.2 By Port with Queue
For each WAN and LAN port, users can designate each port
’
s specific priority queue and
allocate transmission bandwidth to each queue.
By Port Map to Q:
Select priority queue mapping for LAN port 1~4 and WAN from the drop-
down menu. The queue priority is Q3>Q2>Q1>Q0.
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39
Reserve BW:
Specify reserved bandwidth for each queue (Queue-0 ~ Queue-3).
2.6.2.1.3 By DSCP
Differentiated Service Code Point (DSCP) provides a means for users to specify different
priority levels to different applications that uses 6-bit of the DS field to select Per Hop
Behavior (PHB). As defined by the IETF, PHB values are written using a prefix that identifies
the way forwarding should be handled: expedited forwarding (EF) or assured forwarding
(AF). Once DSCP marking is assigned, it can map to a queue for setting up preferred
egress bandwidth.
DSCP Map:
Select priority queue mapping for the DSCP field within every IP Packet from
the drop-down menu. The DSCP includes DSCP (0) to DSCP (63), and the priority queue
includes Q0, Q1, Q2 and Q3. The queue priority is Q3>Q2>Q1>Q0.
Reserve BW:
Specify reserved bandwidth for each queue (Queue-0 ~ Queue-3).
2.6.2.1.4 By 802.1p
IEEE 802.1p is a standard that provides traffic class expediting and dynamic multicast
filtering. Essentially, it provides a mechanism for implementing Quality of Service (QoS) at
the MAC (Media Access Control) level.
Eight priority bits are available, expressed through the 3-bit user_priority field in an IEEE
802.1q header added to the frame. The way traffic is treated when assigned to any particular
class is undefined and left to the implementation.
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40
By 802.1p Map to Q:
Select priority bit and queue mapping for P-Bit-0 to P-Bit-7 from the
drop-down menu. The queue priority is Q3>Q2>Q1>Q0.
Reserve BW:
Specify reserved bandwidth for each queue (Queue-0 ~ Queue3).
2.6.2.1.5 By Application
By Application mode allows users to define a range of port number or a port number in
terms of destination or source port. If conditions are fulfilled, the queue and bandwidth
settings will be applied.
No.:
The total of eight rules can be set up. The comparison process will start from rule No. 1
to No. 8. If the rule No. 1 is fulfilled, then the assigned queue and reserved bandwidth will be
applied. If not, each rule will be checked one by one.
Compare:
Four options are available for selection.
Doesn
’
t Compare:
This rule is disabled.
Source:
Use TCP source port to compare.
Destination:
Use TCP destination port to compare.
Destination & Source:
Use both TCP destination and source port to compare.
Port Start:
Specify the starting TCP port number from 0 to 65535.

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