D-Link Dsh8 Manual

							
 Chapter 6: Command Sets 
GE-DSH-73/DSH-82 and DSH-82-PoE User Manual  157 
SystemLog, SMTP and Event Commands Set 
 
Commands Level Description Example 
systemlog ip  
[IP address]  G  Set System log server IP 
address.  switch(config)# systemlog ip 
192.168.1.100 
systemlog mode 
[client|server|both] G  Specified the log mode  switch(config)# systemlog mode both 
show systemlog 
E  Displays system log.  Switch>show systemlog 
show systemlog  P  Show system log client & 
server information  switch#show systemlog 
 
no systemlog 
G Disable systemlog functon  switch(config)#no systemlog 
smtp enable G  Enable SMTP function  switch(config)#smtp enable 
smtp serverip 
[IP address] G  Configure SMTP server IP  switch(config)#smtp serverip 
192.168.1.5 
smtp authentication G  Enable SMTP authentication  switch(config)#smtp authentication 
smtp account 
[account] G Configure authentication 
account  switch(config)#smtp account John 
smtp password 
[password] G Configure authentication 
password  switch(config)#smtp password 1234 
smtp rcptemail 
[Index] [Email address] G  Configure Rcpt e-mail 
Address  switch(config)#smtp rcptemail 1 
[email protected]
 
show smtp  P  Show the information of 
SMTP  switch#show smtp 
no smtp 
G  Disable SMTP function  switch(config)#no smtp 
event device-cold-start 
[Systemlog|SMTP|Both] G  Set cold start event type  switch(config)#event device-cold-
start both 
event authentication-
failure 
[Systemlog|SMTP|Both] G  Set Authentication failure 
event type  switch(config)#event authentication-
failure both 
event ring-topology-
change 
[Systemlog|SMTP|Both] G  Set X-ring topology changed 
event type  switch(config)#event ring-topology-
change both 
event systemlog 
[Link-UP|Link-
Down|Both] I  Set port event for system log switch(config)#interface fastethernet 
3 
switch(config-if)#
event systemlog 
both  
						

							
Chapter 6: Command Sets 
158  GE-DSH-73/DSH-82 and DSH-82-PoE User Manual 
Commands Level Description Example 
event smtp 
[Link-UP|Link-
Down|Both] I  Set port event for SMTP  switch(config)#interface fastethernet 
3 
switch(config-if)#event smtp both 
show event P  Show event selection  switch#show event 
no event device-cold-
start G  Disable cold start event type switch(config)#no event device-cold-
start 
no event authentication-
failure G Disable Authentication 
failure event typ  switch(config)#no event 
authentication-failure 
no event ring-topology-
change G  Disable X-ring topology 
changed event type  switch(config)#no event ring-
topology-change 
no event systemlog 
I  Disable port event for 
system log  switch(config)#interface fastethernet 
3 
switch(config-if)#no event systemlog 
no event smpt 
I  Disable port event for SMTP  switch(config)#interface fastethernet 
3 
switch(config-if)#no event smtp 
show systemlog  P  Show system log client & 
server information  switch#show systemlog 
 
 
  
						

							
 Chapter 6: Command Sets 
GE-DSH-73/DSH-82 and DSH-82-PoE User Manual  159 
SNTP Commands Set 
 
Commands Level Description Example 
sntp enable  G  Enable SNTP function  switch(config)#sntp enable 
sntp daylight G  Enable daylight saving time, 
if SNTP function is inactive, 
this command can’t be 
applied.  switch(config)#sntp daylight 
sntp daylight-period 
[Start time] [End time]  
G  Set period of daylight saving 
time, if SNTP function is 
inactive, this command can’t 
be applied.  
Parameter format: 
[yyyymmdd-hh:mm]  switch(config)# sntp daylight-period 
20060101-01:01 20060202-01:01 
sntp daylight-offset 
[Minute] 
G  Set offset of daylight saving 
time, if SNTP function is 
inactive, this command can’t 
be applied.   switch(config)#sntp daylight-offset 3 
sntp ip 
[IP] 
G  Set SNTP server IP, if SNTP 
function is inactive, this 
command can’t be applied.  switch(config)#sntp ip 192.169.1.1 
sntp timezone 
[Timezone] 
G  Set timezone index, use 
“show sntp timzezone” 
command to get more 
information of index number
 
switch(config)#sntp timezone 22 
show sntp  P  Show SNTP information  switch#show sntp 
show sntp timezone P  Show index number of time 
zone list  switch#show sntp timezone 
no sntp 
G  Disable SNTP function  switch(config)#no sntp 
no sntp daylight G  Disable daylight saving time switch(config)#no sntp daylight 
 
  
						

							
Chapter 6: Command Sets 
160  GE-DSH-73/DSH-82 and DSH-82-PoE User Manual 
X-ring Commands Set 
 
Commands Level Description Example 
ring enable G  Enable X-ring  switch(config)#ring enable 
ring master G  Enable ring master  switch(config)#ring master 
ring couplering G  Enable couple ring  switch(config)#ring 
couplering 
ring dualhoming G Enable dual homing  switch(config)#ring 
dualhoming 
ring ringport 
[1st Ring Port] [2nd Ring Port] G  Configure 1st/2nd Ring Port  switch(config)#ring ringport 7 
8 
ring couplingport 
[Coupling Port]  G  Configure Coupling Port  switch(config)#ring 
couplingport 1 
ring controlport 
[Control Port] G  Configure Control Port  switch(config)#ring 
controlport 2 
ring homingport 
[Dual Homing Port] G  Configure Dual Homing Port switch(config)#ring 
homingport 3 
show ring 
P  Show the information of X - 
Ring  switch#show ring 
no ring  
G Disable X-ring  switch(config)#no ring 
no ring master G  Disable ring master  switch(config)# no ring 
master 
no ring couplering G  Disable couple ring  switch(config)# no ring 
couplering 
no ring dualhoming G  Disable dual homing  switch(config)# no ring 
dualhoming 
 
  
						

							
 Chapter 6: Command Sets 
GE-DSH-73/DSH-82 and DSH-82-PoE User Manual  161 
PoE Command Set 
 
Commands Level Description Example 
poe  P  Configure PoE function  switch# poe 
exit PoE  Exit the PoE command mode switch(poe)# exit 
port [PortNumber] state 
[Enable | Disable]    Set PoE port State  switch(poe)# port 1 state enable 
port [PortNumber] plfc 
[Enable | Disable] PoE  Set PoE port Power Limit 
from Classification  switch(poe)# port 1 plfc enable 
port [PortNumber] 
legacy 
[Enable | Disable] PoE  Set PoE port Legacy  switch(poe)# port 1 legacy enable 
port [PortNumber] 
priority 
[Low|High|Critical]
 PoE  Set PoE port Priority  switch(poe)# port 1 priority critical 
port [PortNumber] 
powerlimit 
[Value]  PoE  Set PoE port Power Limit 
Value  switch(poe)# port 1 powerlimit 10 
system  
PoE  Configure PoE System  switch(poe)# system 
system knockoff-
disabled 
[Enable | Disable] PoE  Set PoE system Port 
Knockoff Disabled  switch(poe)# system knockoff-
disabled enable 
system ac-disconnect 
[Enable | Disable]
 PoE  Set PoE system AC 
Disconnect  switch(poe)# system ac-disconnect 
enable 
system capacitive-
detect  
[Enable | Disable]
 PoE  Set PoE system Capacitive 
Detection  switch(poe)# system capacitive-
detect enable 
system power-limit 
[Value]
  PoE  Set PoE system System 
Power Limit  switch(poe)# system power-limit 100 
 
 
  
						

							
Chapter 6: Command Sets 
162  GE-DSH-73/DSH-82 and DSH-82-PoE User Manual  
						

							
 
GE-DSH-73/DSH-82 and DSH-82-PoE User Manual  163 
Chapter 7 
Switch Operation  
Address Table 
The Switch is implemented with an addre ss table. This address table composed of 
many entries. Each entry is used to stor e the address information of some node in 
network, including MAC address, port no,  etc. This information comes from the 
learning process of Ethernet Switch. 
Learning 
When one packet comes in from any port, th e Switch will record the source address, 
port no. And the other related information in  address table. This information will be 
used to decide either forwarding  or filtering for future packets. 
Forwarding & Filtering 
When one packet comes from some port of the Ethernet Switching, it will also check 
the destination address besides the source  address learning. The Ethernet Switching 
will lookup the address-table for the destinat ion address. If not found, this packet will 
be forwarded to all the other ports except  the port, which this packet comes in. And 
these ports will transmit this packet to th e network it connected. If found, and the 
destination address is located at different  port from this packet comes in, the 
Ethernet Switching will forward this packet  to the port where this destination address 
is located according to the  information from address table. But, if the destination 
address is located at the same port with th is packet comes in, then this packet will be 
filtered. Thereby increasing the network throughput and availability  
						

							
Chapter 7: Switch Operation 
164  GE-DSH-73/DSH-82 and DSH-82-PoE User Manual 
Store-and-Forward 
Store-and-Forward is one type of packet-forwarding techniques.  A Store-and-
Forward Ethernet Switching stores the incoming frame in an internal buffer, do the 
complete error checking before transmission . Therefore, no error packets occurrence, 
it is the best choice when a netw ork needs efficiency and stability. 
The Ethernet Switch scans the destinatio n address from the packet-header, searches 
the routing table pro-vided for the incoming  port and forwards the packet, only if 
required. The fast forwarding makes the sw itch attractive for connecting servers 
directly to the network, thereby increasing throughput and availability.\
 However, the 
switch is most commonly used to segmen t existence hubs, which nearly always 
improves overall performance. An Ethernet  Switching can be easily configured in any 
Ethernet network environment to signific antly boost bandwidth using conventional 
cabling and adapters. 
Due to the learning function of the Et hernet switching, the source address and 
corresponding port number of each incomi ng and outgoing packet are stored in a 
routing table. This information is subs equently used to filter packets whose 
destination address is on the same segmen t as the source address. This confines 
network traffic to its respective domain an d reduce the overall load on the network. 
The Switch performs Store and forward th erefore, no error packets occur.  More 
reliably, it reduces the re-transmissio n rate.  No packet loss will occur. 
Auto-Negotiation 
The STP ports on the Switch have built-i n Auto-negotiation. This technology 
automatically sets the best possible bandw idth when a connection is established 
with another network device (usually at Powe r On or Reset). This is done by detect the 
modes and speeds at the second of both de vice is connected and capable of, both 
10Base-T and 100Base-TX devices can connect wi th the port in either Half- or Full-
Duplex mode. 
 
If attached device is: 100Base-TX port will set to: 
10Mbps, no auto-negotiation  10Mbps. 
10Mbps, with auto-negotiation  10/20Mbps (10Base-T/Full-Duplex) 
100Mbps, no auto-negotiation  100Mbps 
100Mbps, with auto-negotiation  100/ 200Mbps (100Base-TX/Full-Duplex) 
 
  
						

							
 
GE-DSH-73/DSH-82 and DSH-82-PoE User Manual  165 
Chapter 8 
Power Over Ethernet 
Overview  
What is PoE? 
Based on the global standard IEEE 802.3af, Po E is a technology for wired Ethernet, the 
most widely installed local area network technology adopted today. PoE allows the 
electrical power necessary for the operation  of each end-device to be carried by data 
cables rather than by separate power cord s. New network applications, such as IP 
Cameras, VoIP Phones, and Wireless Netw orking, can help enterprises improve 
productivity. It minimizes wires that must be  used to install the network for offering 
lower cost, and less power failures. 
IEEE802.3af also called Data Terminal eq uipment (DTE) power via Media dependent 
interface (MDI) is an international standard  to define the transmission for power over 
Ethernet. The 802.3af is delivering 48V powe r over RJ-45 wiring. Besides 802.3af also 
define two types of source eq uipment: Mid-Span and End-Span. 
•  Mid-Span 
Mid-Span device is placed between legacy  switch and the powered device. Mid-Span 
is tap the unused wire pairs  4/5 and 7/8 to carry power, the other four is for data 
transmit. 
•  End-Span 
End-Span device is direct connecting with  power device. End-Span could also tap the 
wire 1/2 and 3/6.  
						

							
Chapter 8: Power Over Ethernet Overview 
166  GE-DSH-73/DSH-82 and DSH-82-PoE User Manual 
PoE System Architecture 
The specification of PoE typically requires two devices: the Powered Source 
Equipment (PSE) and the Powered Device (PD) . The PSE is either an End-Span or a Mid-
Span, while the PD is a PoE-enabled terminal , such as IP Phones, Wireless LAN, etc. 
Power can be delivered over data pairs or  spare pairs of standard CAT-5 cabling. 
How Power is Transferred Through the Cable 
A standard CAT5 Ethernet cable has four twis ted pairs, but only two of these are used 
for 10BASE-T and 100BASE-T. The specificatio n allows two options for using these 
cables for power, shown in Figure 8-1 and Figure 8-2: 
The spare pairs are used. Figure 8-1 shows the pair on pins 4 and 5 connected 
together and forming the positive supply,  and the pair on pins 7 and 8 connected and 
forming the negative supply. (In fact, a late ch ange to the spec allows either polarity 
to be used). 
Figure 8-1 - Power Supplied over the Spare Pins 
 
The data pairs are used. Since Ethernet pairs  are transformer coupled at each end, it 
is possible to apply DC power to the center  tap of the isolation transformer without 
upsetting the data transfer. In this mode of  operation the pair on pins 3 and 6 and the 
pair on pins 1 and 2 can  be of either polarity.