Network testing equipment for broacasting NICs and packet dropping equipment...

Hello:
    Today after countless hours (6) of testing two ProCurve 48 port switches, a Dell PowerConnect switch, T1 equipment, 2 Shortel Routers, an Adtrain device, 2 servers, and cables, we eventually figured our where the broadcasting and dropped packets were coming from.  The issues were coming from the Dell PowerConnect switch and one of the ProCurve switches.  
Is there a hardware device test or good software Network Analyzer tool(s) that can detect a problem and pinpoint a NIC/Device on the network that is spewing out bad packets on the network?  Any solid recommendations would be appreciated.
eitconsultingAsked:
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Kamran ArshadIT AssociateCommented:
Hi,

As mentioned above Wireshark is the best possible tool and its free. Also you need to have a Syslog server to collect all the errors from devices. This way you can manage your Infrastructure better. Some of the syslog servers are;

Lire      www.logreport.org      Open-Source
Epylog Log Analyzer      linux.duke.edu/projects/epylog      Open-Source
SLAPS-2      www.openchannelfoundation.org      Open-Source
Sisyphus      www.cs.sandia.gov      Open-Source
LogHound      www.estpak.ee/%7Eristo      Open-Source
syslog-ng      www.balabit.com      Open-Source
rsyslog      www.rsyslog.com      Open-Source
metalog      metalog.sourceforge.net/      Open-Source
sysklogd      freshmeat.net/projects/sysklogd/      Open-Source
RSA enVision      www.rsa.com      Propriety
TriGEO      www.trigeo.com      Propriety
SNARE Backlog      www.intersectalliance.com      Propriety
Loglogic      www.loglogic.com      Propriety
EventTracker PULSE      www.prismmicrosys.com      Propriety
SysLog Manager      www.theonesoftware.com      Propriety
WinSyslog      www.winsyslog.com      Propriety
syslog_manager      www.theonesoftware.com      Propriety
logserver      www.op5.com      Propriety
Syslog Watcher      www.snmpsoft.com      Propriety
tftpd3d      tftpd32.jounin.net      Propriety
Syslog Collector      www.loriotpro.com      Propriety
NetDecision LogVision      www.netmechanica.com      Propriety
KiwiSysLog      www.kiwisyslog.com      Propriety
SolarWinds      www.solarwinds.com      Propriety
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eitconsultingAuthor Commented:
Thank you.
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