Cajun P220G Quick guide

Cajun™ P220G Gigabit Switch
Configuration and Operation Guide (Document Number 610-0065-041)

Cajun P220G Gigabit Switch Configuration and Operation Guide 1.2
© Copyright LUCENT TECHNOLOGIES 1998 ALL RIGHTS RESERVED
Printed in USA, November 1998
The products, specifications, and other technical information regarding the products contained in this document are
subject to change without notice. All information in this document is believed to be accurate and reliable, but is
presented without warranty of any kind, express or implied, and users must take full responsibility for their application
of any products specified in this document. Lucent disclaims responsibility for errors which may appear in this
document, and it reserves the right, in its sole discretion and without notice, to make substitutions and modifications in
the products and practices described in this document.
Lucent, Cajun, CajunDocs, OpenTrunk, P550, and CajunView are trademarks of Lucent Technologies.
3Com is a registered trademark of 3COM corporation.
Cisco and Catalyst are registered trademarks of Cisco Systems, Inc.
Bay Networks is a registered trademark and System 5000 is a trademark of Bay Networks, Inc.
ALL OTHER TRADEMARKS MENTIONED IN THIS DOCUMENT ARE PROPERTY OF THEIR RESPECTIVE
OWNERS.
Document Number - 610-0065-041


Cajun P220G Configuration and Operation Guide iii

Manual Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .viii
Contacting Lucent Technologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .viii
        
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Switch Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Crossbar Switch Fabric . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Virtual Bridging Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Flood Pruning Using VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Hunt Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
OpenTrunk Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Spanning Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Buffer and Queue Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Web-Based Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Smart Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
RMON for Traffic Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
       
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Connecting to the Web Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Configuring the Switch Using the Web Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Logging into the Web Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
Entering Basic System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Setting the P220G’s System Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Providing an Optional Online Help Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
Adding the Document Files to an Existing Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
Installing the Documentation Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
Entering the Server Location at the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Configuring User Accounts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
Configuring Port Parameters Using the Web Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11
Configuring Physical Port Parameters on Gigabit Ports . . . . . . . . . . . . . . . . . . . . . . . . . .2-11
Configuring Switch Ports Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13
Using the All Switch Ports Configuration Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-14
Configuring Port VLAN Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-15
Configuring Non-VLAN Switch Port Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16
Examples of Switch Ports Settings for Various VLAN Connection Types . . . . . . . . . . . . .2-17
Setting Up SNMP Communities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19
Changing the Console Serial Port Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-21

iv Cajun P220G Configuration and Operation Guide
     !"  #" $ % 
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Using Virtual LANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Creating and Implementing VLANs Using the Web Agent . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Creating a VLAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Configuring VLAN Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Creating 3Com Mapping Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Creating Additional 3Com Mapping Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Using Spanning Tree Setup and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Bridges in a P220G Switch Spanning Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
Implications of a Multi-layer Spanning Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
Managing Spanning Tree Using the Web Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10
Configuring All Ports for Spanning Tree Fast Start Mode . . . . . . . . . . . . . . . . . . . . . .3-12
Configuring Spanning Tree Bridge Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14
Using Hunt Groups to Aggregate Bandwidth Between Switches . . . . . . . . . . . . . . . . . . . . . .3-16
Before Configuring Hunt Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-16
Configuring Hunt Groups Using the Embedded Web Server . . . . . . . . . . . . . . . . . . . . . .3-17
Adding Ports to a Hunt Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-19
 &  ' ( $ )
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Buffer Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
P220G Switch Queues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Managing Buffers and Queues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Additional Buffers on Fast Ethernet Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
 *  ' $$ +$ #,
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Configuring the Address Forwarding Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Setting the Age Timer and Super Age Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Controlling Reconfiguration of Address Table Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
Displaying the Address Forwarding Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
Adding Entries to the Address Forwarding Table Manually . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7
 -  ,./ !0 1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Viewing Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Intrepreting Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-4
Setting Up a Mirror Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8

Cajun P220G Configuration and Operation Guide v
 2  '    
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Interpreting Front Panel LED Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Checking Temperature Status and Setting Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
Checking Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4
Setting Log Sizes and Activating System Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-5
Viewing the Switch Event and Shutdown Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
Checking Power and Cooling Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-11
 3    11$  4
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Using the Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Basic Keyboard Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
Command Line History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
Inband VLAN Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
$5  6,$ ! , $   
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Downloading New Operational Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Preparing for the Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Downloading the New Operational Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Configuration Archival and Retrieval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Cajun P220G Switch Configuration and Operation Guide vii

 
This guide includes the following chapters:
❒Chapter 1 gives a brief overview of the P220G switch.
❒Chapter 2 explains how to configure the P220G switch.
❒Chapter 3 explains how to use VLANs, spanning trees, and hunt groups (also
known as link aggregation).
❒Chapter 4 explains how to monitor the P220G switch.
❒Chapter 5 explains how to manage buffers and queues.
❒Chapter 6 explains how to manage address forwarding tables.
❒Chapter 7 explains how to analyze your network using RMON and Ethernet
Statistics.
❒Chapter 8 provides the commands that can be used with the CLI.
❒Appendix A explains how to download new operational code.
 
For installation information, refer to the Cajun™ P220G Gigabit Switch Installation
Guide.
  
For information about Lucent products and services, please consult the Lucent World
Wide Web site at http://www.lucent.com.
To contact Lucent’s Technical Support, call:
1-800-237-0016, press 0, then press 73300

Preface
viii Cajun P220G Switch Configuration and Operation Guide

Cajun P220G Switch Configuration and Operation Guide 1-1




The P220G switch supports the requirements of the next wave of networking:
❒More bandwidth
❒Elimination of bottlenecks
❒Better manageability
❒Dependable multimedia support
The P220G switch offers an unrivaled combination of capacity and Class of
Service/Quality of Service (CoS/QoS) features. The system satisfies the demanding
requirements of the bandwidth-starved campus backbone and high-performance
workgroup environments.
The switch has the following features:
❒Seven fixed gigabit-speed Ethernet ports, fixed
❒Optional Expander module
• Four 10/100BASE-TX ports (autosensing)
• Two 100BASE-FX ports
• One 1000Base-SX or 1000Base-LX
• One 1000Base-SLX

Overview of the P220G Gigabit Switch
1-2 Cajun P220G Switch Configuration and Operation Guide
 
This section describes the following switch features:
❒Crossbar Switch Fabric
❒Virtual Bridging Functions
❒Flood Pruning Using VLANs
❒Hunt Groups
❒OpenTrunk Technology
❒Spanning Tree
❒Buffer and Queue Management
❒Web-Based Management
  
The crossbar switch matrix provides low latency, high throughput packet switching using
a crossbar architecture.
Crossbars are inherently more scalable than shared memory architectures.
Architecturally, you can add more capacity simply by adding more switch elements. By
comparison, shared memory switches have an inherent maximum upper boundary in
throughput that makes high-density, single-backplane gigabit switches impractical. This
means that as you increase the number of gigabit portsin your network, the architecture
can scale to meet your needs.
The crossbar supports:
❒Five fabric ports (three for fixed media ports, one for the Supervisor Module, and
one for the optional expansion card) running at full line rate
❒1.76 Gb/s (in and out) on each fabric port
❒31.68 Gb/s total capacity
❒Under-subscribed switching fabric
❒Single copy replication. When possible, input frames destined for output multiple
switch ports pass through the crossbar only once and are copied by the crossbar to
each destination.
❒Hardware-assisted multicast pruning. The switch forwards only to appropriate
destination switch ports.

Overview of the P220G Gigabit Switch
Cajun P220G Switch Configuration and Operation Guide 1-3
  
The switch design supports:
❒Over 24,000 Media Access Control (MAC) addresses in the switch address
forwarding table. This feature allows the switch to store forwarding information for
hosts in very large networks.
❒Segmented address tables qualified by address and Virtual LAN (VLAN)
membership. This feature allows the same host to appear on different VLANs on
different ports.
❒Optional per-VLAN spanning tree. This isolates loop control to smaller domains, so
spanning trees converge faster during reconfiguration.
   
VLANs provide network managers with two significant capabilities:
❒The ability to segment traffic in a “flat” switched network. This helps prevent traffic
from being forwarded to stations where it is not needed.
❒The ability to ignore physical switch locations when creating workgroups. VLANs
are logical constructions and can traverse physical switch boundaries.
The hardware supports Layer 1, port-based VLANs.
The P220G switch-based VLANs have the following characteristics:
❒Frames classified as they enter the switch using Layer 1 (Port-based).
❒Explicitly tagged VLAN packets are forwarded based on the information in the
packet. (See OpenTrunk Technology on page 1-4 for more information.)
❒Up to 1024 VLANs: VLANs define a set of ports in a flooding domain. Packets that
need to be flooded are sent only to ports participating in that VLAN.

Overview of the P220G Gigabit Switch
1-4 Cajun P220G Switch Configuration and Operation Guide
 
Hunt groups (also known as link aggregation) aggregate bandwidth from multiple ports
so they act as one high-bandwidth switch port. The concept used is borrowed from the
world of telephony, where incoming calls to a single phone number are routed to the
first availableline. Hunt groups allow you to create multi-gigabit pipes to transport traffic
through the highest traffic areas of your network.
A hunt group provides:
❒Shared traffic load.
❒Destination address-based traffic sorting, which keeps packets in the right order.
❒Fault tolerance. If a port in a group fails, the remaining ports in the group pick up
the traffic load.
❒Support for any number of same-speed connections in a group.
❒Quicker recovery from link failure: If a port in the group fails, the remaining ports
can carry the load. Recovery not limited by spanning tree convergence time
(convergence time is the time the network takes to resume steady-state forwarding
after spanning tree reconfiguration).
❒Up to eight groups per switch.
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The P220G switch is delivered as a plug and play IEEE 802.1d standard bridge, but
supports several VLAN tagging schemes. This makes the switch highly interoperable in
existing networks because:
❒Any port can be a trunk port.
❒Ports have configurable VLAN tagging on a per-port basis.
❒Ports process a number of popular VLAN tagging schemes, including major
vendors’ proprietary schemes (Figure 1-1).

Overview of the P220G Gigabit Switch
Cajun P220G Switch Configuration and Operation Guide 1-5
Figure 1-1. Tagging Schemes
OpenTrunk technology has the following features:
❒Switch supports frame encapsulation:
• Identifies frame VLAN via tag
• Associates frame priority
❒Switch supports multiple tagging formats:
• IEEE pre-standard format based on 802.1Q draft document
• A major vendor’s multi-layer tagging scheme
• 3Com® VLAN Tag and PACE priority signalling
❒Switch supports translation to and from any format. A packet can enter the switch
with a 3Com SuperStack II VLAN tag and exit the switch as a multi-layer tagged
packet (Figure 1-2).
Figure 1-2. Trunking Translation
3Com LinkSwitch
Multilayer
IEEE 802.1Q
3Com LinkSwitch
Multilayer
IEEE 802.1Q
P550
OpenTrunk translates VLAN-tagged frames
from one format to another (including CoS)
P220G
Frame
Format:
•“Clear”
•IEEE
802.1Q
•Multilayer
•3Com
Translation Function Translation Function
Frame Format:
“Normal” - Ethernet
or 802.3 with valid
CRC
Trunking Translation:
Frame
Format:
•“Clear”
•IEEE
802.1Q
•Multilayer
•3Com

Overview of the P220G Gigabit Switch
1-6 Cajun P220G Switch Configuration and Operation Guide
 
There are three spanning tree models:
❒Single IEEE 802.1d spanning tree (Figure 1-3).
❒Spanning Tree Per VLAN.
❒Optimized “per-VLAN” spanning trees using a scalable, two-layer spanning tree
approach (Figure 1-6).
Multi-layer spanning trees provide two very important capabilities:
❒Smaller spanning tree domains, which means much faster convergence during
spanning tree reconfiguration.
❒Per-VLAN operation, which allows you to use more of the available bandwidth
when you have redundant links. A particular link can be blocked on one VLAN,
but still forward packets on another.
All models interoperate with legacy IEEE 802.1d bridges and switches.
Figure 1-3. Spanning Tree
Single 802.1D Spanning Tree
One Spanning Tree
Longer convergence
One path to and from root for all VLANs
Improper configuration
can shut down Trunk Links
Multi-Level Spanning Tree
Backbone terminates 802.1D STP
Smaller STP Domains
Quicker Convergence
VLAN Load Balancing
Interoperates w/ existing Bridge/Routers
Multi-layer Spanning Tree

Overview of the P220G Gigabit Switch
Cajun P220G Switch Configuration and Operation Guide 1-7
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Adding gigabit speeds to existing networks means that there can be a huge disparity
between link speeds. For example, anything more than a 1-percent load on a gigabit link
could easily overwhelm a 10 Mb/s Ethernet link.
Without queue and buffer management, gigabit links might only move congestion in a
network, rather than relieving it.
The switch employs the following buffer and queue management techniques:
❒Configurable active backpressure:
• Half-duplex ports use active backpressure to jam input ports when their frame
buffers are full.
• Full-duplex links use IEEE 802.3x pause control frames to pause traffic when
buffers are full.
❒Packed frame buffers for optimal memory utilization. The P220G switch approach
to memory management allows virtually 100% utilization of buffer memory.
❒Two Class of Service priority queues that provide flexible queue management
algorithms to meet application requirements.
❒Large buffer space:
• 512KB per gigabit port or 10/100 ports
• 128KB additional for outbound 10/100 ports.
❒Configurable queue depth for each of two prioritized packet queues.
❒Configurable priority threshold.
❒Configurable service ratio tunes queue priority.

Overview of the P220G Gigabit Switch
1-8 Cajun P220G Switch Configuration and Operation Guide
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Web-based management allows you to manage switches from any station connected to
your network.
The switch offers a command line interface to set up connection, and a rich set of
web-based management features:
❒Reduced Instruction Set Computing- based (RISC) Supervisor provides high-speed
VLAN, RMON, and network management support.
❒Web Agent: Built-in SNMP and HTML-based agent, compatible with popular Web
browsers, provides top-to-bottom switch management.
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Smart Agent, the software for the Supervisor Module, has the following features:
❒Built-in support for Simple Network Management Protocol (SNMP) and HTML
❒Out-of-band from 10BASE-T or RS-232
❒In-band from a defined VLAN
❒Powerful alarm and event logging subsystem
❒Point and click interface with Netscape Navigator V3.0 or later or Microsoft
Internet Explorer V3.0 or later
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RMON (Remote Monitoring) for traffic analysis has the following features:
❒Four groups implemented in hardware
❒Configurable mirror destination per switch fabric port

Cajun P220G Switch Configuration and Operation Guide 2-1

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This chapter provides the information needed if you are powering up the P220G switch
for the first time:
❒Connecting to the Web Agent
❒Configuring the Switch Using the Web Agent
❒Providing an Optional Online Help Server
❒Configuring User Accounts
❒Configuring Port Parameters Using the Web Agent
❒Setting Up SNMP Communities
❒Changing the Console Serial Port Settings
To complete initial switch setup, you need a PC with a serial line connection. It must
have the following terminal setting to communicate with the switch (Table 2-1).
Table 2-1. Terminal Settings
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Configuring the P220G Gigabit Switch
2-2 Cajun P220G Switch Configuration and Operation Guide
    
To connect to the Web Agent, you must first use the serial command line interface to
give the supervisor module an IP address and a subnetwork mask. To connect to the Web
Agent, complete the following steps:
1. Start the switch as instructed in the Cajun P220G Switch Installation Guide.
2. Attach a serial cable from the serial port on your PC to the serial port on the
switch’s front panel using a 9-pin straight-through male-to-female serial cable.
3. Run a terminal emulation program (HyperTerminal, for example) on the attached
PC. Make sure that the terminal settings match those listed in Table 2-1.
4. Press Enter on the PC’s keyboard. The following prompt displays:
Lucent Technologies P220G Switch Agent v1.x.x
Press Ctrl-P for previous command, Ctrl-N for next command, ? for help.
Login:
Note: The user name and password are case sensitive.
5. Enter the username “root”. The terminal prompts for a password.
Password:
6. Enter “root” (the default password), then press Enter. The command prompt
displays.
7. Enter the following command:
P220G Switch> net ip address ethernet_console <ip address> <ip mask>
Where: <ip address> is the IP address of the switch and <ip mask> is the subnetwork
mask. The mask must be in decimal numbers (255.255.255.0, for example).
Note: The inband IP address is associated with the default VLAN by default. Refer
to Chapter 8 to change the default to a different VLAN.
8. Press Enter.
9. Enter a default gateway (first hop router) for the subnetwork this switch connects
to using the following command:
P220G Switch> net ip default_gateway ethernet_console <address>
Where: <address> is the address of the router port.

Configuring the P220G Gigabit Switch
Cajun P220G Switch Configuration and Operation Guide 2-3
10. Enter the following commands to give the Supervisor Module’s network interface
an IP address and default gateway to assign addresses to the Web Agent for inband
access over the network:
P220G Switch> net ip address inband <ip address> <ip mask>
P220G Switch> net ip default_gateway inband <address>
Note: Do not use the same IP address for both the console port and the inband
connection. Each interface must have a unique IP address, and be on a
separate IP subnetwork.
Note: You can have only one default gateway address. You must decide whether
the gateway address should be on the inband or out-of-band Ethernet
console port.
Depending on which IP addresses you have assigned, you can connect to the
system either in-band or out-of-band using the 10Base-T port on the front panel.
To connect using the console 10Base-T port, complete the following steps:
1. Attach a 10Base-T-compliant crossover cable to the RJ-45 connection in the switch
front panel listed in Table 2-2. The other end is assumed to be connected to an
Ethernet endstation such as a PC.
Note: If you are connecting the console Ethernet to a repeater or switch port, a
straight-through 10Base-T cable must be used. If you are connecting to an
endstation (such as a PC), a cross-over 10Base-T cable must be used.
Table 2-2. Pinouts for 10Base-T Crossover Patch Cables
2. Log in to the switch using a web browser, as described in the “Logging into the Web
Agent” section, later in this chapter.
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Configuring the P220G Gigabit Switch
2-4 Cajun P220G Switch Configuration and Operation Guide
    !   
The P220G provides an embedded HTTP server that enables you to set all parameters on
a particular switch. Use this interface for quick and simple configuration changes.
   ' 
Although the Web Agent supports any frames-capable browser, the switch has been
qualified with the following browsers:
❒Netscape Navigator 3.0 or later
❒Microsoft Internet Explorer 3.0 or later
To log in to the Web Agent, complete the following steps:
1. Start your browser.
2. Enter the URL of the switch you want to manage in the Location field
(example: http://127.253.253.0). Each interface to the Supervisor Module (console
or inband) has a separate IP address.
3. Press Enter. The Welcome screen displays (Figure 2-1):
Figure 2-1. Switch Login Screen
4. Click Login. The Login screen displays.
5. Enter a valid user name, then press Tab. The default super user name is root.
6. Enter the password for the user name you entered. The default password is root.
The System Information screen of the Web Agent displays (Figure 2-2).

Configuring the P220G Gigabit Switch
Cajun P220G Switch Configuration and Operation Guide 2-5
Note: Change the root password for the system as soon as possible to prevent
unauthorized access into your system.
Figure 2-2. System Information Screen (Web Agent)
From this screen, you can access and/or configure the following information using the
scrolling list at the left-hand side of the Web Agent:
❒System Configuration - discussed in later in this chapter and Chapter 4.
❒System Information - discussed later in this chapter and in Chapter 6.
❒Statistics - discussed in Chapter 6.
❒Switching parameters - discussed in Chapter 3.
❒Event Subsystem - discussed in Chapter 7.
❒Address Forwarding Tables - discussed in Chapter 5.
❒Memory Subsystems - Appendix A.
❒Port Mirroring - discussed in Chapter 6.