Compex SAS2224B User manual

Quick Install Guide
Compex 24-Port + 1
Expansion Slot Switch
SAS2224B
Version 1.1

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CONTENTS
1. Introduction........................................................................................ 1
1.1. Packaging Content ....................................................................2
1.2. Overall Procedures.....................................................................2
2. Hardware Installation.........................................................................3
2.1. Desktop installation................................................................... 3
2.2. Rack installation ........................................................................4
2.3. Module Installation ................................................................... 5
2.4. Operating Systems Compatibilities for the usage of Keyboard
Arrow Key .................................................................................. 6
3. Hyper Terminal Configuration ..........................................................7
4. Configure Compex SAS2224B using Hyper Terminal .......................9
4.1. Port Configuration..................................................................... 9
4.2. Port Trunking ...........................................................................11
4.3. Global Configuration ............................................................... 12
4.4. Quality of Service..................................................................... 13
4.5. Port Tagging Control .............................................................. 14
4.6. VLAN Global Control.............................................................. 15
4.7. VLAN Member Setup.............................................................. 17
5. Monitor your Compex SAS2224B via Hyper Terminal .................... 19
5.1. Overview .................................................................................. 19
5.2. Port Status................................................................................ 20
5.3. Diagnostics .............................................................................. 20
5.4. Changing your Password......................................................... 21

5.4.1 Forget your Password ................................................. 21
5.5. Save your Configuration .......................................................... 21
5.6. Load Factory Default Setting .................................................. 21
Appendix I Panel Views and Descriptions .................................... 22
Appendix II Specifications.............................................................. 25
Technical Support in English version................................................. TS-1
Warranty Card in English version ............................................................. I

English Compex 24-Port + 1 Expansion Slot Switch
SAS2224B
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Quick Install Guide
Compex 24-Port + 1 Expansion Slot Switch
SAS2224B
1. Introduction
Figure 1.1 Compex SAS2224B
Compex SAS2224B is a Fast Ethernet switch that provides 24 10/100Mbps ports capable of
delivering full/half duplex transmission with flow control. SAS2224B provides an expandable
slot using 100Mbps fiber optic module. Advanced features like Virtual LANs and port priority
are configurable through the console port. SAS2224B also allows network administrators to
control the traffic bandwidth of each port on the switch. With full auto negotiation function for
the switch operational mode, coupled with large switching backplane capacity, the Compex
SAS2224B is the cost-effective solution for expanding your network.

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1.1. Packaging Content
Thank you for purchasing Compex SAS2224B. You will find the following items in the
package:
1 x Power Cord 3 x Quick Install Guide
with warranty card in
different languages
1 x Compex SAS2224B unit
1 x RS232 straight
console cable
6 x screws 2 x brackets
1.2. Overall Procedures
Here are some of the basic steps to guide you along:
1. Hardware setup
Please refer to Section 2 “Hardware Installation”.
2. Configure Hyper Terminal
Please refer to Section 3 “Hyper Terminal Configuration”.
3. Configure your Compex SAS2224B
Please refer to Section 4 “Configure Compex SAS2224B using Hyper
Terminal”.

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2. Hardware Installation
Compex SAS2224B can be installed as a desktop unit or mounted on a 19-inch rack. Detailed
installation process will be listed as shown.
2.1. Desktop installation
Insert one end of RJ45 network cable to any
port of Compex SAS2224B and the other
end to your PC.
Insert the power cord to the socket
located at the back of Compex
SAS2224B and the other end to the
power point.
Check that the Power LED at the front
panel of Compex SAS2224B has lighted
up. The unit is now ready to use.
Insert one end of RS232 straight console
cable to the console port of Compex
SAS2224B and the other end to your PC.

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2.2. Rack installation
Secure brackets to the holes located at both
sides of Compex SAS2224B. Fasten it with
the screws provided in the packaging.
Align the brackets holes with the
rack holes and fasten both brackets
to the rack.
Insert one end of RJ45 network cable to any
port of Compex SAS2224B and the other
end to your PC.
Insert the power cord to the socket
located at the back of Compex
SAS2224B and the other end to the
power point.
Check that the Power LED at the
front panel of Compex SAS2224B has
lighted up. The unit is now ready to
use.
Insert one end of RS232 straight console
cable to the console port of Compex
SAS2224B and the other end to your PC.

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NOTE
Please allow at least 4 inches of clearance on the front and back of the switch for
proper ventilation. This is especially important for enclosed rack installation.
2.3. Module Installation
A series of optional expansion modules are available for Compex SAS2224B. You need
to install the modules before turning on Compex SAS2224B. Please refer to
“Specifications” for the types of optional modules to be used.
Power off Compex SAS2224B,
unscrew and remove the metal plate
from the expansion slot.
Insert the module carefully into the
expansion module window and
p
ush it along the rail until it is
firmly inserted into the connector
of the PCB board of Compex
SAS2224B. Tighten the screws on
the module.

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NOTE
The expansion module is sold separately. Please refer to www.compex.com.sg or
www.cpx.com for more details.
To remove the expansion module, simply power off your Compex SAS2224B, draw out the
expansion module from the expansion slot and place back the metal plate to cover the slot.
2.4. Operating Systems Compatibilities for the usage of Keyboard Arrow
Key
Compex SAS2224B is specially designed with the support of two arrow key sets to
manipulate the selection in the console interface.
The table below illustrates the types of operating systems using different types of
function keys in your keyboard.
Windows 95, 98, 98SE, XP,
ME or 2000
Windows 2000 with SP 1
←→↑↓
J L I M J L I M
If you are using Windows 2000 Hyper Terminal Program, ensure that you have installed
Windows 2000 Service Pack 2 or higher. With Windows 2000 Service Pack 2, the
arrow keys will function properly in the Hyper Terminal’s VT100 emulation.

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3. Hyper Terminal Configuration
By installing a terminal emulation program, such as Hyper Terminal, you can simply connect
your PC to Compex SAS2224B. Using a RS232 straight console cable, connect one end to a
PC, and the other end to Compex SAS2224B. You need to set your configuration as shown
below.
1. Type the name in the space provided.
2. Choose the COM Port that you have
selected from your PC.

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3. Adjust the Port setting from the COM1 (depends on the console port you have used)
Properties screen.
Bits per seconds: 19200
Data Bits: 8
Parity: none
Stop bits: 1
Flow Control: none
A Hyper Terminal screen will appear as shown below. The default password is password.

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You can easily configure your Compex SAS2224B, such as setting the trunking ports, VLANs,
etc.
4. Configure Compex SAS2224B using Hyper Terminal
Attach one end of the console cable to your PC and the other end to your Compex SAS2224B.
Configure your hyper terminal and log on to the main page to start configuring.
4.1. Port Configuration
This feature allows you to configure the speed, flow control, receiving and transmitting
bandwidth of your Compex SAS2224B.

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Speed:
This option allows the port to work in either forced or auto mode. When Compex
SAS2224B is set to 100Mbps forced mode, auto-MDIX function will be disabled.
Please note that when auto-MDIX is enabled, the respective port LED in the 100
FORCE and HALF FORCE mode, will not light up.
Upon setting the speed to Auto, you will be able to use any type of Ethernet RJ45 cable
for connecting to any devices since the auto-MDIX function has activated.
Options: Auto, 100M Full, 100M Half, 10M Full, 10M Half
Please note that for expansion module (Port 25), you can only configure as 100 Full or
100 Half Duplex. By default, it is set to 100 Full Duplex.
Flow Control:
This feature reports the flow control setting of the port. Enabling flow control function
prevents the overflow of data transfer in the network.
Rx/Tx Bandwidth:
This feature will control the bandwidth of the received/transmitted packets for all ports.
Each port’s bandwidth is configurable on both ingress and egress traffic independently.
By default, this feature is set to Non-Control for all ports. This means that Compex
SAS2224B will follow the bandwidth of each individual port, either in 10Mbps or
100Mbps.
Please note that whenever the ingress or egress traffic bandwidth exceeds the configured
threshold, the flow control will be triggered to limit the throughput.
Options: Non-control, 128Kbps, 256Kbps, 512Kbps, 1Mbps, 2Mbps, 4Mbps, 8Mbps

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4.2. Port Trunking
Port Trunking is the ability to group together several 10/100Mbps ports into single
logical link. This is an inexpensive method to increase throughput between switches.
Compex SAS2224B supports 7 trunking groups, and each trunking group can aggregate
2 or 4 fixed physical ports.
Enable your desired trunking group/s by tapping your space bar from your keyboard.
NOTE
Port Trunking is not applicable to Port 25 (expansion module).

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4.3. Global Configuration
This option allows you to configure the global port control registers.
Half Duplex Back Pressure Flow:
Compex SAS2224B supports two backpressure flow control scheme to force incoming
packet back off after the switch destination port is congested. This means that when A
sends packets to B continuously, the latter might not be able to receive all packets on
time. As a result, some of the packets will be dropped. Upon enabling this option, B will
send out a packet, informing A to slow down the progress in transmitting the packets.
Broadcast Storm Filtering Control:
Enabling this option will allow each port to drop broadcast packets after a continuous
received broadcast packets counter up to 64 count. The counter will be reset to 0 every
800ms or when receiving any non-broadcast packets.
Loop Detect:
Compex SAS2224B provides loop-detecting function to alarm a network loop existing
via the diagnostic section (Section 5.3).

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4.4. Quality of Service
Quality of Service (QoS) refers to the capability of a network to provide a better service
to selected ports in the switch. A port with priority set High will have its transmitted
packets serviced first at the receiving port.
Compex SAS2224B can recognize QoS priority information from the incoming packets
and distribute packets in different queues for different service priority. It identifies the
packets’ priority based on:
TOS/Diff Serv. Priority:
This stands for Type of Services/Differentiated Services Priority. When TCP/IP's
TOS/DiffServ (DS) based priority is applied, Compex SAS2224B can recognize TCP/IP
Differentiated Services Codepoint (DSCP) priority information from the DS-field
defined on RFC2474. The DS field byte for IPv4 is the Type-of-Service (TOS) octet,
and for IPv6, it is the Traffic-Class octet. The recommended DiffServ Codepoints is
defined in RFC2597 to classify the traffic into different service classes.
802.1p Priority:
802.1p is an IEEE standard for providing quality of service (QoS) in Ethernet networks.
It uses tagged packets and allows switches to transmit packets based on the tagged
priority value.

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Adapted Flow Control:
Upon disabling this function, Compex SAS2224B can automatically turn off 802.3x
flow control and Back pressure flow control for 1~2 seconds whenever the port receives
a high priority frames. The flow control is re-enabled when no priority frames are
received for 1~2 seconds.
Priority Weighted Ration (High:Low):
Compex SAS2224B supports 2 levels of priority queues. The packet-based priority
weighted ratio of high-priority and low-priority queuing can be set as 4:1, 8:1 or 16:1 or
1:0.
4.5. Port Tagging Control
This option allows you to determine the tagging status of incoming frames that needs to
be forwarded to their respective destinations.
Don’t touch
Compex SAS2224B will leave the frames as it is, regardless of whether they are tagged
or untagged.
Remove Tag
Compex SAS2224B will follow the instruction for the individual ports and remove the
tag from the incoming frame before forwarding it to its destination.

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Insert Tag (high-priority only)
Compex SAS2224B will follow the instruction for the individual port and insert the tag
for incoming frames that are set to high priority before forwarding them to their
destination.
Insert Tag (all frame)
Compex SAS2224B will follow the instruction for individual port and insert a tag to all
incoming frames before forwarding them to their respective destinations.
Kindly select your option by toggling the space bar from your keyboard.
NOTE
This function can be enabled even if the VLAN function is not enabled.
4.6. VLAN Global Control
This feature allows you to control the various types of events that can encounter in the
network.

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VLAN Function:
Normally, any broadcast/multicast and unicast packet all not allowed switching between
VLANs. For example, Port 1 broadcast packet will only flood to port 2 and 3, and port 1
unicast packet is not allowed to forward to any member of another VLAN.
If the leaky VLAN function is enabled, 3 types of specific frame could be forward to
different VLAN destination port:
♦Unicast packet leaky control
♦ARP broadcast leaky control
♦IP multicast leaky control
These 3 types of leaky control are useful for a switch to be broken into many VLANs
and want to enable a host-to-host communication between different VLANs without any
router or with router but improve the router performance.
Unicast Packet Inter-VLAN Leaky:
Unicast is a term to describe the communication in the network that packets are being
sent out from one point to another point.
Upon enabling this option, Compex SAS2224B allows the packet to be forwarded to a
destination port at different VLAN.
ARP broadcast Packet Inter-VLAN Leaky:
ARP broadcast refers to the ARP packets that are being sent out from one point to all
connected points in the network.
Upon enabling this option, Compex SAS2224B allowed ARP frame to be broadcasted
to all switch ports.
IP Multicast Packet Inter-VLAN Leaky:
IP multicast provides dynamic many-to-many connectivity between a set of senders (at
least 1) and a group of receivers.
Upon enabling this option, Compex SAS2224B allows the IP multicast packet to be
flooded to all multicast address group members.