Extreme Networks Virtual Chassis, Summit Virtual Installation Manual
virtchas.book Page i Friday, May 29, 1998 10:08 AM
Summit Virtual Chassis
Design and Installation
Guide
Extreme Networks, Inc.
10460 Bandley Drive
Cupertino, California 95014
(888) 257-3000
http://www.extremenetworks.com
Published: June 1998
Part No: 120031-00 rev. 01
virtchas.book Page ii Friday, May 29, 1998 10:08 AM
Copyright © Extreme Networks, Inc., 1998. All rights reserved. No part of this documentation may be
reproduced in any form or by any means or used to make any derivative work (such as translation,
transformation, or adaptation) without permission from Extreme Networks, Inc.
Extreme Networks, ExtremeWare, Summit, SummitLink,Virtual C hassis and the Extreme Networks
logo are trademarks of Extreme Networks.
All other brand and product names are registered trademarks or trademarks of their respective
holders.
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Summit Vir tual Chassis Design
and Installation Guide
The Summit™ Vi rtual Chassis™ is a high-performance, low-cost external backplane that
connects up to eight stacked or distributed Summit switches into one cohesive system.
™
The Summit Virtual Chassis comes with eight SummitLin k
UMMARY OF FEATURES
S
Features of the Summit Virtual Chassis include the following:
• Increased port density
• Policy-based Quality of Service (QoS)
• Load-sharing links
• Extensive fault-tolerant capabilities
— Redundant power supplies
— Hot-swappable switches
• Hot-swappable Virtual Chassis
— Environmental senso rs
backplane channels.
UMMIT VIRTUAL CHASSIS DESIGN AND INSTALLATION GUIDE
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UMMARY OF FEATURES
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NCREASED PORT DENSITY
I
The Summit Virtual Chassis can be combined with any member of the Summit switch
family. When four Summit Virtual Chassis are used with eight Summit1 switches, up to
32 Gigabit Ethernet ports can be connected using the Virtual Chassis external backplane.
When two Virtual Chassis are combined with eight Summit48 switche s, up to 384
10/100 Mbps Ethernet ports can be connected. A single Virtual Chassis connected to
eight Summit3 switches provides 192 10/100 Mbps ports.
OLICY-BASED QUALITY OF SERVICE
P
(QOS)
Policy-based QoS is a feature of the Sum mit switch family. QoS profiles are defined in
the Summit switch, and allow you to specify priority, and minimum and maximum
bandwidth per traffic group. You can define QoS traffic groups based on the following:
• Internet Protocol (IP) destination address
• Virtual LAN (VLAN) (including IP subnet or protocol)
• Media Access Control (MAC) destination address
• Physical source port
• 802.1p prioritization
™
ExtremeWare
software running on the Sum mit switch maps the QoS p rofiles into
queues on each port of the switch. When up to eight Summit switches are connected to
a Summit Virtual Chassis, four interconnecting queues for each switch ( totaling 32
queues) are allocated on each Summit Virtual Chassis link.
OAD-SHARING LINKS
L
For increased fault tolerance, throughput, and bandwidth, two- or 4four-port
load-sharing links can be used to create parallel path s between Summit switches and
two or four Summit Virtual Chassis.
Figure 1 shows two Summit1 switches connected using four parallel paths to four
Summit Virtual Chassis. The result is a full mesh of parallel paths between each Summit
switch and the Summit Virtual Chassis.
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Switch #1
4-port
load-sharing groups
UMMARY OF FEATURES
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Switch #8
Figure 1:
Four-port load-sha ring links with t he Summit Vir tual Chassis
Figure 2 shows two Summ it48 switches using two parallel paths to tw o Summit Virtual
Chassis. The result is a full mesh of parallel paths.
2-port
load-sharing groups
Switch #1
Switch #8
Figure 2:
Two-por t load-shar ing links with the Summit Virtual Chassis
Using load-sharing lin ks, the Summ it Virtual Chassis distributes traffic to and from each
Summit switch on any of the pa rallel connected paths. This results in faster data
throughput among the switches conn ected to the Summit Virtual Chassis.
UMMIT VIRTUAL CHASSIS DESIGN AND INSTALLATION GUIDE
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UMMARY OF FEATURES
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Another advantage of parallel paths between Summit switches and the Summit Virtual
Chassis is that the a llocati on of tra ffic between connec tions is transpa rent to the ad dress
tables and routing protocols. If a connection is broken, traffic is redirected to a parallel
path without causing an address table or routing table update.
XTENSIVE FAULT TOLERANT CAPABILITIES
E
The Summit Virtual Chassis includes a number of fault tolerant capabilities, in cluding
the following:
— Redundant power supplies
— Hot-swappable switches
— Hot-swappable Virtual Chassis
— Environmental senso rs
R
EDUNDANT POWER SUPPLIES
The Summit Vi rtual Chassis is equipped with two internal load-sharing power supplies.
A single power supply provides power to the Summit Virtual Chassis. Combined, the
two power supplies provide load-balancing to increase the longevity of each supply,
and deliver uninterrupted service in the event of a failure.
In addition to the two internal power supplies, the Summit Virtual Chassis comes with
dual external redundant power supplies (RPS) that deliver power for up to two Summit
switches in the stack. DC cables are provided to connect each RPS output to a single
Summit switch.
The Summit Virtual Chassis has two power sockets. The upper power socket provides
power to one of the Summit Virtual Chassis internal power supplies. It also provides
backup power to the Summit swi tch that is connected to th e Summit Virtual Chassis
using the upper RPS port.
The lower power socket provides power to the second Summit Vi rtual Chassis internal
power supply, and to the Summit switch that i s connected to the Summit Virtual
Chassis using the lower RPS port .
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UMMIT VIRTUAL CHASSIS FRONT VIEW
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HOT-S
WAPPING SUMMIT SWITCHES AND SUMMIT VIRTUAL CHASSIS UNITS
You can easily add, remove, and replace Summit switches that are interconnected with
the Summit Virtual Chassis without affecting users li nked to other swi tches in the s tack.
No actions are required prior to disconnecting a Summi t switch, removing it from the
stack, adding a new swit ch to the stack, or replacing a switch . Other switches connected
to Summit Virtual Chassis continue to operate normally. When a s witch is replaced or
added, users connected to the new switch can automatically communicate with devices
attached to other switches in the stack.
When a stack of Summ it swi tches are connected t o two or more Summit Virtual Chassis,
you can hot-swap one of t he Virtua l Chassis without affecting commu nication between
devices attached to the stack. If a system LED on a Summit Virtual Chassis indicates a
failure, the Summit Virtual Chassis can be disconnected, removed from the stack and
replaced, while remaining transparent to all users. All traffic continue s to pass through
the operational Summ it Virtual Chassis while the failed unit is replaced.
E
NVIRONMENTAL SENSORS
The Summit Vi rtual Chassis is equipped with sensors that monitor the internal
temperature and send an alert if the temperature exceeds 60 degrees centigrade.
Fans in the Summit Virtual Chassis are built with a tachometer sensor th at detects a fan
failure if the rotation speed decreases by 20%. This allows you to ma ke necessary
repairs to the Summit Virtual Chassis before a failure occurs.
UMMIT VIRTUAL
S
Figure 3 shows the front panel view of the Su mmit Virtual Chassis.
SummitLink ports
Figure 3:
UMMIT VIRTUAL CHASSIS DESIGN AND INSTALLATION GUIDE
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Summit Vir tual Chassis fron t panel
HASSIS FRONT VIEW
C
AMBER
TX ACTIVITY
AMBER
RX ACTIVITY
GREEN
LINK OK
AMBER
LINK ERROR
TX RX
ACTIVITY
12345678
12345678
12345678
LINK
Port status
LEDs
SummitLink ports
Unit status LEDs
87654321
5
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