BenQ SM2224 User manual

FCC Warning
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a residential
environment. This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with this user's guide, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a
particular installation.
CE Mark Warning
This is a Class A product. In a domestic environment, this product may cause radio
interference, in which case the user may be required to take adequate measures.
Trademarks
Copyright © 2002 Benq Corporation.
Contents subject to change without prior notice. Benq is a registered trademark of Benq
Corporation. All other trademarks belong to their respective proprietors.
Copyright Statement
No part of this publication may be reproduced in any form or by any means or used to make
any derivative such as translation, transformation, or adaptation without permission from Benq
Corporation.

i
Table of Contents
1. Introduction.........................................................1
1.1 Product Overview.......................................................1
1.2 Features and Specifications.......................................2
1.2.1 Features............................................................................. 2
1.2.2 Technical Specifications..................................................... 2
1.2.3 Physical Specifications...................................................... 5
1.2.4 Physical Ports.................................................................... 6
1.2.5 Basic Functions.................................................................. 6
1.2.6 VLAN................................................................................ 10
1.2.7 Class-of-Service (CoS) Support ...................................... 14
1.2.8 GVRP............................................................................... 14
1.2.9 IGMP Snooping and IP Multicast Filtering....................... 15
1.2.10 Switch Management...................................................... 16
1.3 Product outlook and LED display............................. 17
1.3.1 Product Outlook............................................................... 17
1.3.2 LED Display..................................................................... 18
1.4 Package contents..................................................... 19
2. Installation......................................................... 20
2.1 Operating Environment ............................................20
2.2. Connecting to Your Network....................................21
2.2.1 Cable Type & Length....................................................... 21
2.2.2 Cabling............................................................................. 22
2.3 Connecting to Power................................................23
2.4 Optional module installation..................................... 25

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2.4.1 Gigabit Fiber/Copper Module Installation........................ 25
2.4.2 100FX Fiber Module Installation...................................... 26
3. Switch Management ......................................... 27
3.1 Management Access Overview................................28
3.2 Administration Console ............................................30
3.3 Web Management.................................................... 32
3.4 SNMP-Based Network Management .......................32
3.5 Protocols..................................................................33
3.6 Management Architecture........................................34
4. Menu-Driven Console Management ................ 36
4.1 Logging on to the switch...........................................36
4.2 Switch Management Screen .................................... 37
4.3 Basic Management ..................................................40
4.3.1 Start with Selection Menu................................................ 40
4.3.2 General Management Configurations.............................. 41
4.3.3 LAN Port Configurations.................................................. 43
4.3.4 Console Port Configurations............................................ 49
4.4 Advanced Management ...........................................51
4.4.1 Start with Selection Menu................................................ 51
4.4.2 L2 Switching DataBase.................................................... 54
4.4.3 IP Networking................................................................... 67
4.4.4 Bridging............................................................................ 81
4.4.5 Static Filtering.................................................................. 85
4.4.6 Spanning Tree Functions................................................. 88
4.4.7 SNMP Functions.............................................................. 93
4.4.8 Other Protocols................................................................ 96

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4.4.9 Port Trunking ................................................................... 99
4.4.10 Port Mirroring............................................................... 101
4.4.11 QoS.............................................................................. 103
4.4.12 File transfer.................................................................. 129
4.5 Logout....................................................................136
4.6 Save Settings.........................................................136
4.7 Restore Default Settings ........................................ 136
4.8 Reboot....................................................................136
5. Web-Based Browser Management ................ 137
5.1 Logging on to the switch.........................................137
5.2 Understanding the Browser Interface..................... 139
5.3 Performing File Activities........................................141
5.3.1 Start with Selection Menu.............................................. 141
5.3.2 Saving Setting................................................................ 142
5.3.3 Receive File Via TFTP................................................... 142
5.3.4 Reboot ........................................................................... 143
5.3.5 Logout............................................................................ 144
5.4 Performing Basic Setup Activities ..........................145
5.4.1 Start with Selection Menu.............................................. 145
5.4.2 General Management Configuration.............................. 146
5.4.3 LAN Port Configuration.................................................. 148
5.4.4 Console Port Configuration............................................ 153
5.5 Performing Advanced Setup Activities ................... 156
5.5.1 Start with Selection Menu.............................................. 156
5.5.2 MAC Address Management........................................... 157
5.5.3 IP Networking................................................................. 161
5.5.4 Per Port Statistics .......................................................... 171

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5.5.5 Bridging.......................................................................... 173
5.5.6 Static MAC Filter............................................................ 174
5.5.7 IP Multicast Group ......................................................... 178
5.5.8 VLAN Perspective.......................................................... 179
5.5.9 Spanning Tree Perspective............................................ 185
5.5.10 SNMP........................................................................... 189
5.5.11 Other Protocols............................................................ 192
5.5.12 Port Trunking ............................................................... 193
5.5.13 Port Mirroring............................................................... 195
5.5.14 QoS.............................................................................. 196
6. SNMP & RMON Management ......................... 212
6.1 Overview................................................................212
6.2 SNMP Agent and MIB-2 (RFC 1213).....................213
6.3 RMON MIB (RFC 1757) and Bridge MIB (RFC 1493)
.....................................................................................214
7. Trouble Shooting ............................................ 216
Appendix:............................................................ 217
Ordering Information....................................................217

1. Introduction-1
1. Introduction
1.1 Product Overview
This manual describes how to install and use the SM2224 Management
Gigabit Switch. This switch introduced here is designed to deliver full
scalability with SNMP/RMON web-based management functions by
providing 24x10/100BASE-TX fixed ports, optional 2x100BASE-FX
and optional 2x1000BASE-SX/LX or 1000BASE-T ports. For the two
100BASE-FX fiber ports, each allows for multi-mode SC, ST, VF-45,
MT-RJ fiber module or single-mode SC fiber module. For the two
Gigabit ports, it allows options of fiber type and wavelength at user’s
discretion. This switch brings a simple answer for today’s complicated
networking environments.
To get the best view of this manual, you should have an understanding of
Ethernet networking basic concepts.
In this manual, you will find:
Features on the switch
Illustrative LED functions
Installation instructions
Management Configuration
SNMP, DHCP, IGMP…
Specifications

1. Introduction-2
1.2 Features and Specifications
1.2.1 Features
24x10/100BASE-TX ports with RJ-45 connectors,
Optional 2x100BASE-FX fiber ports, each allows for
multi-mode SC, ST, VF-45, MT-RJ fiber module or single-mode
SC fiber module.
Optional 2x gigabit module slots, each allows for
1000Base-SX/LX fiber module or 1000BASE-T copper module
Auto-negotiation for speed and duplex-mode on all TX ports
Full wire-speed forwarding rate
Store-and-forward mechanism
Back-pressure and IEEE 802.3x compliant flow control
Supports 32K MAC addresses
Provides 2M memory buffer
Front panel reset button
Standard 19” rackmount size, one-unit-height
1.2.2 Technical Specifications
Ethernet Standard IEEE 802.3 10Base-T
IEEE 802.3u 100Base-TX
IEEE 802.3ab 1000Base-T
IEEE 802.3z 1000Base-SX/LX
Switch Method Store-and-Forward
Forwarding rate 14,880pps for 10Mbps
148,800pps for 100Mbps
1,488,000pps for 1000Mbps

1. Introduction-3
Cable
10Base-T:
100Base-TX/
1000Base-T
1000Base-SX:
1000Base-LX:
2-pair UTP/STP Cat. 3, 4, 5
2-pair UTP/STP Cat. 5
Both up to 100m (328ft)
62.5/125µm multi-mode fiber
(850nm) Up to 220m
50/125µm multi-mode fiber
(850nm)
Up to 550m
62.5/125µm multi-mode fiber
(1300nm)
Up to 550m
10/125µm single-mode fiber
(1300nm)
Up to 20km
LED Indicators Per unit –Power status
Per port –LNK /ACT, FDX/COL,
10/100M
Per Gigabit port –LNK /ACT,
FDX/COL
VLAN
Port-base VLAN,
802.1Q compliant tagged VLAN, up to 255 groups
TRUNKING
Port trunking is provided by 3 groups. Group 1 & group 2,
each allows up to 4 ports trunking selected from port 1 ~
port 24 while group 3 allows 2 gigabit ports trunking.

1. Introduction-4
PORT-SECURITY
Limit number of MAC addresses learned per port
Static MAC addresses stay in the filtering table
PORT-MIRRORING
Port-mirroring provided through any two pair of mirror
and capture ports
COS(IEEE802.1P CLASSIFICATION OF SERVICE)
4-level transmission priorities: 4 queues per output port
Packet transmission scheduled using Weighted Round
Robin (WRR)
User-defined weights
Classification of packet priority can be based on either a
VLAN tag on packet or a user-definable port priority
INTERNETWORKING PROTOCOLS
Bridging: 802.1D Spanning Tree
802.1p/Q – GARP/GVRP
Routing: RIP
RIP-2
DHCP-Relay
ICMP Router Discovery Message
IP Multicast: IGMP Snooping
IP Multicast Packet Filtering
(Maximum of 256 VLANs and IP multicast

1. Introduction-5
sessions)
NETWORK MANAGEMENT METHODS
Console port access via RS-232 cable
Telnet remote access
SNMP agent: MIB-2 (RFC1213)
Bridge MIB (RFC1493)
RMON MIB (RFC1757) –statistics,
history, alarm and events
VLAN MIB (802.1Q/RFC2674)
Private MIB
Java applet-based MIB browser
Web browser support based on HTTP server and CGI
parser
Kermit/TFTP software-upgrade capability
1.2.3 Physical Specifications
Power 100~240VAC 50-60Hz
Operating Temperature 0°C ∼50°C
Storage Temperature -20°C ∼70°C
Operating Humidity 10% ∼90% RH
Emission Compliance FCC part 15 Class A, CE
Mark, VCCI, C-tick
Safety UL/CSA
Dimension W 435 mm X D 221 mm X H
44 mm (17.1” X 8.7” X 1.8”).

1. Introduction-6
Standard 19” rack-mount size,
one-unit-height.
Net Weight 3.4 kg(7.5lb)
1.2.4 Physical Ports
The Management Gigabit Switch provides 24x10/100Base-TX
fixed ports and optional slots for 100Base-FX, 1000Base-SX/LX
and 1000Base-T ports.
1.2.5Basic Functions
In general, the switch is responsible for switching both VLAN
tagged and untagged frames from a receiving port to one or
more transmitting ports. The switch performs multiple steps
during the switching process:
lVLAN classification
lLearning
lFiltering
lForwarding
lAging
Below is additional information about tasks that the switch
performs during unicast and multicast switching.
UNICAST SWITCHING
VLAN CLASSIFICATION
When the switch receives a frame, it classifies the frame in one
of two ways:
lIf the frame is untagged, the switch classifies the frame to an
associated VLAN.

1. Introduction-7
lIf the frame is tagged, the switch uses the tagged VLAN ID to
identify the broadcasting domain of the frame.
LEARNING
After VLAN classification, the switch checks the <source MAC
address, VLAN> pair in the switching database (SDB) to see
whether the <source MAC address, VLAN> pair is known.
lIf it is unknown, the switch inserts the <source MAC address,
VLAN> into the SDB and learns the <source MAC address,
VLAN>.
lIf it is known, the switch checks the <source MAC address,
VLAN> for a mismatched port ID. If the port ID associated
with the <source MAC address, VLAN> pair in the SDB is
different than the receiving port, the switch modifies the port
ID in the SDB and modifies its management database (MDB)
accordingly.

1. Introduction-8
FILTERING
After learning the address, the switch checks:
lWhether the source port or destination port is in the
forwarding state.
lWhether the source MAC address or destination MAC
address is to be filtered.
lWhether the source port ID is the same as destination port
ID.
If any of these conditions are met, the switch drops the receiving.
Otherwise, it continues with the forwarding process described
below.
FORWARDING
During the forwarding process, the switch checks whether the
<destination MAC address, VLAN> pair is unknown.
lIf it is unknown, the switch floods the receiving frame to all
ports in the VLAN, excluding the source port.
lIf it is known, the switch forwards the receiving frame to the
port associated with the <destination MAC address, VLAN>
pair. At the same time, the switch ascertains the individual’s
port’s VLAN tagging/untagging configuration and
corresponding VLAN ID to render the appropriate frame
tagging when the frame is ready to be transmitted.
MULTICAST SWITCHING
For multicast switching, the switch checks whether the received
frame is a BPDU. If a BPDU is received, the switch forwards the
frame to the CPU for processing by the spanning tree protocol.
Otherwise, the switch performs the following processes:
VLAN CLASSIFICATION
Same as for unicast switching.

1. Introduction-9
LEARNING
Same as for unicast switching.
FILTERING
After learning the address, the switch checks:
lWhether the source port or destination port is not in the
forwarding state.
lWhether the source MAC address or destination MAC
address is to be filtered.
lWhether the source port ID is the same as destination port
ID.
If any of these conditions are met, the switch drops the receiving.
Otherwise, it continues with the forwarding process described
below.
FORWARDING
The switch floods the received multicast frame to all ports that
are in forwarding state within the VLAN, excluding the source
port. At the same time, the switch ascertains the individual port’s
VLAN tagging/untagging configuration and corresponding VLAN
ID to render the appropriate frame tagging when the frame is
ready to be transmitted.
AGING
The switch performs the aging process for the <MAC addresses,
VLAN> pair in the switching database. Once a <MAC address,
VLAN> pair is aged out, the SDB is modified.
SPANNING TREE
The switch supports one Spanning Tree per bridged network.

1. Introduction-10
1.2.6 VLAN
A virtual LAN (VLAN) is a network of computers that behave as
if they are connected to the same wire, even though they may
actually be physically located on different segments of a LAN.
VLANs are analogous to a group of end stations, perhaps on
multiple physical LAN segments that are not constrained by their
physical location and can communicate as if they were on a
common LAN.
VLANs are configured through software rather than hardware,
which makes them extremely flexible. One of the biggest
advantages of VLANs is that when a computer is physically
moved to another location, it can stay on the same VLAN
without any hardware reconfiguration.
Because VLANs are not limited by the hardware constraints that
physically connect traditional LAN segments to a network, they
can define a network into various logical configurations. For
example, VLANs can define a network by application. In this
scenario, a company might create one VLAN for multimedia
users and another for email users. VLANs can also define a
network by department. For example, a company might have
one VLAN for its Engineering Department, another for its
Marketing Department, and another for its Account Payable
Department.
VLANs can also be set up according to the organization
structure within a company. For example, the company president
might have his/her own VLAN, the executive staff might have a
different VLAN, and the remaining employees might have yet a
different VLAN.
As these examples show, VLANs offer unparalleled flexibility.

1. Introduction-11
The following sections describe how deploying VLANs can
benefit organizations and reduce administration costs.
BROADCAST CONTAINMENT
In traditional networks, traffic broadcasts to all network devices,
whether they are the intended recipients or not. However,
VLANs can be set up to contain only those devices that need to
communicate with each other. As a result, VLANs significantly
reduce network congestion. In addition, VLANs prevent
broadcast storms from causing network meltdown due to
volumes of traffic.
MULTICAST-BASED MULTIMEDIA APPLICATIONS
Multimedia applications, such as interactive training, video
conferencing, and news-video transmissions, require large
amounts of bandwidth. These applications are also extremely
sensitive to variable delays, which are unavoidable on a shared
Ethernet network. By defining a VLAN based on the IP multicast
address for all subscribing members on the VLAN, sufficient
bandwidth will be available for these application, providing true
multimedia on Ethernet.
ENHANCED SECURITY
Because VLANs are self-contained, only the devices within the
same VLAN can communicate with each other. If a device in one
VLAN wants to communicate with a device in another VLAN, the
traffic must go through a router.

1. Introduction-12
VLAN MEMBERSHIP
VLAN implementation allows:
lUp to 256 VLANs in one switch.
lVLANs across multiple switches by using explicit or implicit
tagging and the GARP/GVRP protocol defined in
IEEE802.1p and 802.1Q.
lAn end station’s network interface card belong to multiple
VLANs.
lA switch port to be associated with multiple VLANs.
DEFINITIONS OF VLAN MEMBERSHIP
VLAN implementation allows VLAN membership to be defined
based on ports. Port-based VLANs are organized by physical
port number. For example, switch ports 1, 2, 4 and 6 can be
grouped on VLAN, while server ports 3, 5, 7 and 8 can be on
another VLAN. Broadcasts from servers within each group
would only go to the members of its own VLAN. This ensures
that broadcast storms cannot cause a network meltdown due to
volumes of traffic.
VLAN MEMBERSHIP LEARNING
Port-based VLAN is defined using a static binding between a
VLAN and its associated ports. The switch’s forwarding decision
is based on the destination MAC address and its associated port
ID. Therefore, to make valid forwarding and flooding decisions,
the switch learns the relationship of the MAC address to its
related port –and thus to the VLAN –at runtime.
REMOTE VLAN LEARNING
In addition to providing network management tools that allow
network administrators to statically add and delete VLAN
member ports, the switch also supports GVRP (GARP VLAN

1. Introduction-13
Registration Protocol). GVRP allows for dynamic registration of
VLAN port members within switch and across multiple switches.
Other than supporting dynamic updating of registration entries in
a switch, GVRP is used to communicate VLAN registration
information to other VLAN-aware switches, so that a VLAN
member can cover a wide span of switches on a network.
GVRP allows both VLAN-aware workstations and switches to
issue and revoke VLAN memberships. VLAN-aware switches
register an propagate VLAN membership to all ports that belong
to the active topology of the VLAN.
VLAN CONFIGURATION
The switch provides a Local/Remote Management Console
Interface for VLAN configuration and management An
SNMP-based VLAN MIB is also provided.
INTRA-VLAN COMMUNICATION
The switch supports intra-VLAN communication through
hardware, as described in “Basic Functions” section.
INTER-VLAN COMMUNICATION
The switch supports inter-VLAN communication using
CPU-based routing software.

1. Introduction-14
1.2.7 Class-of-Service (CoS) Support
The switch provides four transmit queues on each port, with a
weighted round-robin scheme. These functions can be used to
provide independent priorities for various types of data including
real-time video, real-time voice, and best-effort data.
Priority assignment to packet-based switches is accomplished
through explicit assignment by end stations, which have
applications that require a higher priority than best-effort data.
This mechanism utilizes the IEEE802.1p and 802.1Q tag
structure, which the switch uses to decide priority assignments
for the received packets.
1.2.8 GVRP
In addition to network management tools that allow network
administrators to statically add and delete VLAN member ports,
the routing switch supports GARP VLAN Registration Protocol
(GVRP). GVRP supports dynamic registration of VLAN port
members within a switch and across multiple switches.
In addition to dynamically updating registration entries within a
switch, GVRP is used to communicate VLAN registration
information to other VLAN-aware switches, so that members of a
VLAN can cover a wide span of switches on a network.
GVRP allows both VLAN-aware workstations and switches to
issue and revoke VLAN memberships. VLAN-aware switches
register and propagate VLAN membership to all ports that are
part of the active topology of the VLAN.

1. Introduction-15
1.2.9 IGMP Snooping and IP Multicast Filtering
The Internet Group Management Protocol (IGMP) runs between
hosts and their immediately neighboring multicast routers. The
protocol’s mechanisms allow a host to inform its local router that
it wants to receive transmissions addressed to a specific
multicast group.
Routers periodically query the LAN to determine if known group
members are still active. If there is more than one router on the
LAN performing IP multicasting, one of the routers is elected
“querier” and assumes the responsibility of querying the LAN for
group members.
Based on the group membership information learned from the
IGMP, a router can determine which (if any) multicast traffic
needs to be forwarded to each of its “leaf” subnetworks.
Multicast routers use this information, along with a multicast
routing protocol, to support IP multicasting across the Internet.
IGMP provides the final step in an IP multicast packet delivery
service since it is only concerned with the forwarding of multicast
traffic from the local route to group members on directly attached
subnetworks.
Routing switches support IP Multicast Filtering by:
lPassively snooping on the IGMP Query and IGMP Report
packets transferred between IP Multicast Routers and IP
Multicast host groups to learn IP Multicast group members,
and
lActively sending IGMP Query messages to solicit IP Multicast
group members.