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ut
on
Re
rinted from
ell Power Solutions
February 2006. Copyright © 2006 Dell Inc. All rights reserve
ELL POWER SOLUTIONS
1
NETWORK AND COMMUNICATIONS
T
e Cisco IOS an
CatOS operating systems run on Cisco
network switches and
rovide Cisco EtherChannel,
Fast EtherChannel (FEC), and Gigabit EtherChannel
GEC
technolo
ies, which enable network administra
ors to group ports on Cisco switc
es toget
er to increase
available throu
hput. Dell PowerConnect switches o
er
a simi
ar tec
no
ogy
nown as
in
aggregation groups
(LAGs), which are desi
ned to increase the overall band
idth between two Dell switches by aggregating multiple
orts to act as a sin
e,
o
ica
connection
etween t
e
switches. Dell PowerConnect 5316M switches im
lement
IEEE 802.3a
–
ase
in
aggregation, w
ic
is interoper
able with Cisco EtherChannel technolo
y
in
aggregation on De
PowerConnect switc
es can
be con
i
ured as either dynamic or static. The dynamic
con
iguration uses the IEEE 802.3ad standard, which is
also known as Link A
re
ation Control Protocol (LACP).
LACP enables a Gigabit Ethernet switch to con
irm that
he external switch is also confi
ured for link a
re
a
tion. Static configuration is used when connecting the
ell PowerConnect 5316M Gi
abit Ethernet switch to an
externa
Giga
it Et
ernet switc
t
at
oes not support
ACP. In a static con
i
uration, a cablin
or con
i
ura-
tion mista
e invo
ving t
e PowerConnect 5316M or t
e
external switch could
o undetected and thus could cause
un
esira
e networ
e
avior. Bot
static an
namic
AGs (via LACP) can detect physical link failures within
the LAG and continue
orwarding tra
ic through the other
nn
in
wi
in
m
LA
LA
P
n
detect switch or
ort
ailures that do not result in the
loss of a link, helping provide a more resilient LAG. Best
ractices su
est usin
dynamic link a
re
ation instead
of static link aggregation
he examples presented in this article use the command
line inter
ace
CLI
o
the Dell PowerConnect 5316M to con-
i
ure the switch.
2
These example confi
urations also ca
e implemented via the Web-based graphical user inter
ace
GUI
of the PowerConnect 5316M.
BY BRUCE HOLME
Link Aggregation Interoperability
of the Dell Power
onnect 5316M
witch and
isco
witches
This article explains how to configure the Dell
™
PowerConnect
™
5316M Gigabit Ethernet
switch, which resides within the Dell Modular Server Enclosure, to interoperate and
connect with Cisco IOS-based and CatOS-based switches by using industry-standard
link aggregation groups that adhere to the IEEE 802.3ad standard.
Related Categories:
Blade servers
Cisco
Command line interface (CLI)
Data networking
Dell PowerConnect switches
Dell PowerEdge blade servers
Ethernet
Internetworking
Scripting
Visit www.dell.com/powersolutions
for the complete category index.
n dynamic confi
urations, this interoperability is possible only via LACP, not the proprietary Cisco Port A
re
ation Protocol (PA
P). Link a
re
ation interoperability for all Dell PowerConnec
products is tested at the University of New Hampshire InterOperability Lab. This lab tests products for the Bridge Functions Consortium, which includes leading vendors of switch and networking
products. For more in
ormation, visit
tp://
tp.iol.unh.edu/pub/b
c/testsuites/la.io.test.suite.pd
For more information about configuring LAGs via the CLI., see the “Port Channel Commands” section of the
Dell PowerConnect 5316M CLI Reference Guide
at support.dell.com/support/edocs/
etwork/P
5316M/en/
LI/
ortchan.htm#1016308.
3
or more information about confi
urin
LA
s via the
UI, see the “Definin
LA
Parameters” section of the
Dell PowerConnect 5316M Ethernet Switch Module User’s Guide
com/su
ort/edocs/network/P
5316M/en/U
/switch.htm#1125197.
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