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26 Introduction
Stand-alone sniffers exist but the most cost-effective are those that are
a PC application. These applications monitor the subnet to which the
PC is connected and display information about the network traffic. The
applications can usually monitor only specific port numbers or protocols
and display and decode most packet contents.
Nortel recommends the following programs:
Wireshark (freeware). Go to w
ww.wireshark.org
and search for your
required platform. Wireshark is a sniffer and protocol analyzer that
supports encryption. A decoder for the UNIStim protocol is available for
Wireshark. You can obtain the decoder from the FS or GNTS group.
Nortel strongly recommends that you install this decoder to help you
debug signaling problems.
Sniffer Pro. You must purchase a separate VoIP decode option with
this version. (http://www.sniffer.com) You must have a licence key to
run Sniffer Pro. An add-on UNIStim/RUDP message decode package
is available for Sniffer Pro. When the decode package installed, the
proprietary UNIStim/RUDP messaging is decoded. Nortel strongly
recommends that you install this add-on.
Connect a sniffer to the ELAN when you debug VGMC/MGC/Signaling
Server to Call Server or VGMC/MGC/Signaling Server to EM problems.
Connect the sniffer to the TLAN or the LAN with the IP Phone to debug
TPS to IP Phone problems and voice Gateway-related issues. For more
information about using a sniffer, see “Network sniffer” (page 33).
VGMC VxWorks shell access
The following commands control aspects of the VGMC shell access.
While some commands in this document are accepted at the VGMC>
shell prompt, all are accepted at the VxWorks shell prompt (->). Use the
command
vxWorksShell to access that shell interface on the VGMC.
Use vxshell to access the shell interface on the Signaling Server.
Note: Nortel recommends that you use a TTY logon to the VGMC
through an ELAN Telnet session instead of a direct serial port
connection if you log large amounts of data or copy large SYSLOG or
OMREPORT files to the console.
VGMC or MGC maintenance port connections
Connect to the VGMC or MGC maintenance port using the following
methods.
VGMC or MGC card connection
Connect a serial cable to the backplane adaptor or to the faceplate
connector of the MC32S, or SMC card. The card hardware cannot support
two devices connected at once; device damage can occur.
Nortel Communication Server 1000
Troubleshooting Guide for Distributors
NN43001-730 02.02 31 December 2009
Copyright © 2008-2009 Nortel Networks. All Rights Reserved.
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