Техническая Спецификация для Brocade 4120 Switch BR-4120-R0000-A

The Brocade 4100 utilizes new ASIC
technology featuring four 8-port groups. As
a result, an Inter-Switch Link (ISL) trunk can
have up to eight ports supplying as much
as 32 Gbit/sec of data throughput (see
Figure 1). In addition to reducing congestion
between switches and providing greater
total bandwidth, enhanced ISL Trunking
utilizes ISLs more efficiently to free up the 
number of usable switch ports.

Additional performance capabilities
include the following:

• Eight virtual channels on each ISL

enhance Quality of Service traffic 
prioritization and anti-starvation
capabilities at the port level to avoid
performance degradation.

• Exchange-based Dynamic Path Selection

(DPS) optimizes fabric-wide performance
and load balancing by automatically
routing data to the most efficient available 
path in the fabric (see Figure 2). It
augments ISL Trunking to provide more
effective load balancing in certain
configurations, such as routing data 
between multiple trunk groups. As a
result, a combination of DPS and ISL
Trunking provides the greatest design
flexibility and the highest degree of load 
balancing in the fabric.

ENtERPRisE-ClAss AVAilABilitY 

FOR BUsiNEss CONtiNUANCE 

with enterprise-class availability features
such as hot-swappable redundant fans and
power supplies, the Brocade 4100 provides
a reliable foundation for disaster recovery
and business continuance. Moreover, hot

code activation helps maximize application
uptime with faster system upgrades and
maintenance that reduce the dependency
on scheduled outages. Combined with
a wide range of Brocade diagnostic and
monitoring functions, these capabilities help
provide a high-availability SAN environment.

To support disaster recovery and business
continuance operations, the Brocade 4100
enables unprecedented distances between
servers and storage devices. Support for
distances up to 500 kilometers at 1 Gbit/sec
and 100 kilometers at 4 Gbit/sec facilitates
the deployment of high-performance, long-
distance SAN solutions such as data center
consolidation.

HigH sCAlABilitY WitH  

PORts ON DEMAND

Delivering up to 32 ports in a 1U form
factor, the Brocade 4100 combines the
cost-effectiveness of a switch designed for
a variety of SAN environments with highly
scalable Ports on Demand capabilities. The
Brocade 4100 comes with a minimum of 16
ports enabled, and organizations can easily
expand the number of ports to 24 or 32 by
activating a license as their requirements
change. Because the Brocade 4100 is
easily upgradeable, it extends the Brocade
modular “pay-as-you-grow” approach to
support cost-effective business growth.

sUPERiOR ROi AND  

iNVEstMENt PROtECtiON

The Brocade 4100 combines strategic
performance, availability, and scalability
advantages with investment protection for
existing SAN environments. For instance,

Figure 1.  
ISL Trunking with 2 and 4 Gbit/sec links.

1 G

4 g

4 g

3 G

0.5 G

2 G

4 Gbit/sec with 8 trunks

Optimal bandwidth utilization using

up to four 2 Gbit/sec links

congestion

32 gbit/sec

8 gbit/sec

With trunking

With trunking

Without trunking

4 G

4 G

1 G

3 G

0.5 G

2 G

ASIC Preserves

In-order Delivery

ASIC Preserves

In-order Delivery

2 G

1 G

1.5 G

0.5 G

2 G

2 G

1 G

1.5 G

0.5 G

2 G

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1.5 G

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