WebMux WM108E Manuel utilisateur
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Table of Contents
Table of Contents················································································································i
Packing List·······················································································································iii
Main Components·············································································································· 1
Front View·····································································································································1
Rear View ······································································································································2
WebMux Overview············································································································· 3
Key Features··································································································································3
The WebMux Family ···················································································································5
Network Overview························································································································7
Sample Configurations······································································································ 9
Single WebMux·····························································································································9
Redundant Installation ··············································································································11
Installation without IP Address Change··················································································13
Before you Start··························································································································15
Hardware Setup --- Collect Information·················································································16
Hardware Setup ---Setup the new network·············································································16
Hardware Setup ---Configuration Summary··········································································17
Initial Configuration········································································································ 17
NAT Mode Related Configuration···························································································18
Out-of-Path Related Configuration··························································································20
NAT and Out-of-Path Common Configuration······································································20
What if I made mistake in my configuration? ········································································23
Management Console ······································································································ 24
Login·············································································································································24
Main Management Console·······································································································26
Administration Set Up ···············································································································28
Change Browser Login Password: ···························································································33
Set Clock:·····································································································································34
Upload/Download ·······················································································································36
Add Farm·····································································································································37
Modify Farm ·······························································································································40
Add Server: ·································································································································41
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Modify Server ·····························································································································43
Initial setup change Through Browser ····················································································45
Initial Configuration Worksheets···················································································· 47
Sample Configuration Worksheets·················································································· 48
Contact Information ········································································································ 52
FAQs································································································································· 53
Regulations······················································································································· 56
Appendix 1 – How to Add A Loopback Adapter····························································· 57
Appendix 2 - How to make route delete reboot persistent·············································· 58
Appendix 3 - Phone Paging Codes·················································································· 59
Appendix 4 – Virtual Hosting Issues··············································································· 61
Appendix 5 – Sample Custom CGI Code········································································ 62
Appendix 6 – Access CLI Commands············································································· 63
Index································································································································· 64
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Packing List
•One (1) WebMux unit
•One (1) Power cord
•One (1) User Manual
•One (1) Warranty registration card
The WebMux Pro and Model WM108E User Guide – Version 5. 8 Rev16
Copyright© 1997-2005 CAI Networks, Inc.
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Main Components
Front View
Toggle Power Switch
This switch toggles power on and off. To power off, the switch must be pressed
and held for 5 seconds.
Reset Button
Press and release the reset button to reset the WebMux. This process may take
several minutes to complete.
Up Arrow Button, Down Arrow Button
When each button pressed, the value of the cursor location increases or
decreased. It goes through lower case letters, upper case letters, numbers and
symbols. When cursor is located at the left most position on the LCD, up and
down arrow also allow user to select different item to setup.
Left Arrow Button and Right Arrow Button
When each button is pressed, the cursor moves to the left and right.
Check Mark Button, and Cross Button
Check Mark Button confirms the selection, Cross Button cancels the selection. At
any time during the system running, hold down to the Check Mark Button will
invoke the configuration menu allowing the IP address changes.
The WebMux Pro and Model WM108E User Guide – Version 5. 8 Rev16
Copyright© 1997-2005 CAI Networks, Inc.
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Rear View
Server LAN Port
Connect this port to the Server LAN switch or hub. This port connects to the
servers and your local computers. It is the right most RJ45 socket. In Out-of Path
configuration, this is the only Ethernet cable to be connected.
Backup WebMux Port
Optionally, you may connect another WebMux to this port so that you can have
redundancy. If you have more than one WebMux, you can connect them using
cross over cable, or regular cable with a hub.
Router LAN Port
Connect this port to the Router LAN switch or hub. In most situations, this port
connects to the Internet side network in NAT mode. It is the left most RJ45
Socket.
Please note: The Router LAN and Server LAN port are not interchangeable.
External Modem Connect Port
To utilize the phone pager function of the WebMux, please connect the external
modem to this port. In some cases, if you prefer support engineers not using
diagnostic port over Internet, our support engineers can also connect through
modem to assist you for setup issues. An USRobotics V.Everything modem is
required, US Robotics part number 3CP3453. Modem dip switch has 3, 8, and 10
down, rest up. A standard external modem cable also needed. Check with your
modem supplier for the cable.
Power Switch
This switches the WebMux on and off. When in the "off" position, the front panel
power switch is disabled.
Power Cord
Please use the supplied power cord to connect the WebMux™ to power source.
1U WebMux has a 115V/230V AC universal power supply.
The WebMux Pro and Model WM108E User Guide – Version 5. 8 Rev16
Copyright© 1997-2005 CAI Networks, Inc.
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WebMux Overview
Key Features
The WebMux is a standalone network appliance designed primarily to load
balance IP traffic to multiple servers. The WebMux includes the following key
features.
•Improves performance by distributing the traffic for a site or domain
among multiple servers. No one server will be bogged down trying to
service a particular site.
•Provides high availability by tracking which servers are functioning
properly and which servers are out of service. If a server unexpectedly
goes down, the WebMux will automatically re-direct the traffic to other
servers, or will bring a standby or backup server online to service the
traffic. WebMux does application level health check to many network
protocols on servers.
•Provides Persistent Connections by memorizing the user browser
session and the server session and sending the same user to the same
server. This is important for sites using shopping cart and dynamically
generated pages, like BroadVision, ASP and JSP sites.
•Provides fault tolerance. This installation requires two WebMuxes, a
primary and a secondary. Two WebMuxs will automatically sync the
configuration datum.
•Easy management. It can be managed via a secured web browser
session from anywhere in the world. By using https 128 bit encryption to
the management web console, remote management of server farms is
truly possible.
•Operating System independent. No software or agent to load on the
servers. Non-intrusive load/failure detection and management.
•Provides Proxy function. When communication is initiated from behind
the WebMux, the WebMux will substitute its own address for the internal
address. This allows the web servers to initiate communication for
services such as credit card validation and mapping services. (Note: this
function only works in NAT mode).
The WebMux Pro and Model WM108E User Guide – Version 5. 8 Rev16
Copyright© 1997-2005 CAI Networks, Inc.
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•Built-in Firewall Protections. Stop possible hacker intrusion into your
network from Internet. All IP addresses and ports are blocked except the
farm IP address. Built-in functions will detect any possible denial of service
attack and make your services always available. (Note: this function only
works in NAT mode with “Forwarding Deny”, see setup for details).
•In-Path or Out-of-Path Load Balancing. In normal setup, the WebMux
can be configured In-Path, to act as firewall in addition to the load
balancer and health checker. However, if outbound traffic is much larger
than inbound traffic and you already have a firewall in place, or change of
IP address causes problem, consider using Out-of-Path configuration.
Out-of-Path load balancing is also called direct routing, or one leg
operation.
•Informs you of the status of your network. It provides phone pager and
email notification so that the network administrator can be paged or
emailed whenever a server or WebMux goes down, and when it returns
online. This feature could reduce server room night shift operator costs, or
timely repair should the server goes down unexpectedly.
The WebMux Pro and Model WM108E User Guide – Version 5. 8 Rev16
Copyright© 1997-2005 CAI Networks, Inc.
5
The WebMux Family
The 1U WebMux family consists of two models. They are:
•The WebMux
•The WebMux Pro
The table below compares the features of the models.
WebMux WebMux Pro
Topologies:
Ethernet/Fast Ethernet Yes N/A
GB Ethernet (1000Base-TX) N/A Yes
Balancing Method:
Round-Robin Yes Yes
Persistent Round-Robin Yes Yes
Weighted Round-robin Yes Yes
Persistent Weighted Round-
robin Yes Yes
Least Connections Yes Yes
Persistent Least Connections Yes Yes
Weighted Least Connections Yes Yes
Persistent Weighted Least
Connections Yes Yes
Weighted Fast Response Yes Yes
Persistent Weighted Fast
Response Yes Yes
Fault Tolerance:
Diskless Design Yes Yes
Port aggregation Yes Yes
Failover via serial link Yes Yes
Service aware Yes Yes
Server aware Yes Yes
Backup server Yes Yes
Performance:
Maximum concurrent
connections 1,440,000 5,760,000
Maximum new connections per
second 7,000 40,000
Maximum throughput per second 200 MBit/s 1 GBit/s
Maximum Internet Link Speed 2 X T3 1.5 X OC-12
The WebMux Pro and Model WM108E User Guide – Version 5. 8 Rev16
Copyright© 1997-2005 CAI Networks, Inc.
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Management:
Secure web browser access Yes Yes
In service/Not in service Yes Yes
Page alarms Yes Yes
Email Notification Yes Yes
Configuration access Yes Yes
Remote telnet access Yes Yes
Persistent connections Yes Yes
Port mapping Yes Yes
Port-specific services Yes Yes
Year 2000 compliant Yes Yes
Security Features
Network Address Translation Yes Yes
Network Port Translation Yes Yes
TCP SYN protection Yes Yes
TCP DoS protection Yes Yes
SSL support Yes Yes
Device Support:
Maximum virtual servers Unlimited Unlimited
Maximum real servers 65,532 65,532
Device's role in the network IP router IP router
UDP-based service support Yes Yes
Misc.
Overnight Exchange Unit Service Contract Service Contract
Free Email/Phone Support Three Years Three Years
Warranty on Hardware/Firmware Three Years Three Years
Power and Cooling Requirement
90 – 130VAC 2.5A or 190-235VAC 1.5A at 50-60Hz input power required.
Absolute operating temperature range is 0-40C. Recommended operation
ambient temperature not to exceed 30C. Max heat producing factor is 405
BTU/hr.
The WebMux Pro and Model WM108E User Guide – Version 5. 8 Rev16
Copyright© 1997-2005 CAI Networks, Inc.
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Network Overview
The WebMux has two modes, In-Path, or NAT (Network Address Translation)
and Out-of-Path (Direct Routing) mode. Each mode has its advantage and
disadvantages. Lets look the NAT mode first.
The main purpose of the WebMux is to balance the traffic among multiple web or
other servers. The diagram above shows an NAT installation with two
WebMuxes. In this configuration, one WebMux is serving as the primary, and the
other is serving as the secondary, or backup, providing a fault tolerant solution.
In order for the web servers to share the incoming traffic, the WebMux must be
connected to the network. There are two interfaces on the WebMux. One
interface connects to the Router LAN. This is the network to which the Internet
router is connected. The other interface is connected to the Server LAN. This
network connects all the web servers. The WebMux routes traffic between these
two networks.
Next, a Virtual Farm or multiple farms must be configured on the WebMux. A
virtual farm is a single representation of the servers to the clients. A farm consists
of a group of servers that service the same domain, website or services. For
example, to configure a farm (or virtual farm) to serve www.cainetworks.com:
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