Author: Vivek Rajagopalan

What is a MIB Package ? 

A MIB Browser is only as brainy as the number of MIBs you have installed in it. Out of the box, Unbrowse SNMP comes only with a few standard MIBs such as RFC1213-MIB , IF-MIB and a dozen others. You then compile in whatever MIBs your particular network element (router, switch, server) requires.

If you dont want to hunt around and compile the MIBs yourself, you can install “MIB Packages”. A MIB Package is a special ZIP file that contains pre compiled MIBs along with the corresponding text MIB file. Unleash Networks creates these MIB packages by tracking the public MIBs of popular vendors.

See this page for more information

We have released the following SNMP MIB packages for popular vendors today (19-Dec-06). Grab them for free !

• All Cisco MIBs (updated) – A monster MIB package with all the latest public MIBs from Cisco Systems.  This contains 998 modules and over 65,000 objects ! The best way for you to get started with Cisco is to just download this MIB package and install it in Unbrowse SNMP. Instantly, Unbrowse will be able to decode all of Cisco Traps, you can do MIB browse Cisco switches and routers, etc. All of Cisco equipment including Altiga is included in this monster collection. The download is about 30MB, required disk space is 150MB, and it takes about 3-5 minutes to install. Download here
• Juniper JunOS MIBs (updated) – Contains all the mibs for JUNOS Software Enterprise MIBs for J-series, M-series, and T-series Platforms Release 8.1. These mibs for Release 8.1 were published on the Juniper Networks website on 6-Nov-06.
• Juniper ERX MIBs (updated) – Contains all the mibs for the Juniper Networks ERX E-Series Edge router version 7.3 release on 14-Nov-06
• Motorola Canopy Wireless MIBS ( new ! ) – Some of our users are working with the Motorola Canopy Wireless platform. This package contains SNMP mibs for Canopy Enterprise MIBS for CMM Micro, Subscriber Modules, Access Points and Back Haul Radios. Version 7.3.6. Note: We have included two modules for the CANOPY-SYS-MIB. Even though they have the same names – one of them is used for the 45 Mbps backhaul links and the other for 300 Mbps backhaul. Choose the one you want by Right-Clicking the module and selecting “Open SMI”.

We also released a new build of Unbrowse SNMP available at the downloads page. This release fixes some problems with (a) compiling certain MIBs with incorrect SNMPv1 TRAP TYPE objects, (b) errors with custom UDP ports, (c) other minor fixes.

[tags] Cisco MIBs, Cisco SNMP, Juniper SNMP, Canopy MIBS, Motorola Canopy Wireless, Enterprise MIBs, MIB browser packages [/tags]

A couple of users said they had trouble installing / running Unbrowse SNMP due to permission issues on Windows 2000 systems. This post is intended to give more detail on how this can be resolved. Also see Unbrowse FAQ.

Unbrowse SNMP abides by Microsofts guidelines for managing user data and settings (See Microsoft Technet article). What this means is : all user settings are stored under the users Application Data folder. This folder can be viewed by typing in %APPDATA% in the Start Menu > Run box.

When a user first launches Unbrowse SNMP, it tries to create a place for storing configuration data under the above mentioned %APPDATA% folder. The subdirectory is called “Unleash Networks\Unbrowse”. If this directory cannot be created you will be confronted with a dialog box similar to the one shown below.

Checking permissions of the APPDATA folder

1. Select “Start -> Run” and type in %APPDATA% in the box. Then click the OK button.

2. Right-click on an blank area (not on any file) and select “Properties”.

3. This will bring up the Properties window of the Application Data folder. Switch to the “Security Tab”. You should see something like this.

Figure below : Administrator has “Full Control” privileges. Correct !

Not like this.

Figure below : User vivk1 does not have Write/Modify privileges. BAD !

Check the “Full Control” item to give Read-Write access to the folder.

Note:

If there is a folder called “Unleash Networks” within the Application Data folder. Delete it. Unbrowse SNMP will recreate it on first run.

Hope this helps.

[tags] snmp, mib browser, windows2000, permissions [/tags]

Unsniff Network Analyzer has the ability to perform VoIP analysis of H.323, SIP, IAX2 signalling and the RTP and IAX2 transport protocols. For the IAX2 (protocol used by the Asterisk PBX system), you can also use the add-on script “Asterisk Call Analyzer” to draw charts for Jitter, Delay, Bandwidth, etc.

Unsniff supports one-click playback of captured VoIP traffic for most common codecs such as G.711 uLaw, G.711 aLaw, iLBC, GSM, and Linear.

Playback call legs

By default Unsniff extracts all VoIP calls into two legs – the forward and reverse legs. To hear the voice you must

• Switch to the “User Objects” sheet
• Right click on the desired leg and select “Play”

How to listen to call legs :

 

Stereo playback for RTP transport

If you want to hear both talkers you can use some of the cool mixing features built into Unsniff.  When enabled, you will now have three entries in the “User Objects” sheet for each call.

1. the forward leg
2. the reverse leg
3. both legs mixed so you can hear the complete VoIP conversation

 

The mixing supported for the RTP protocol is very unique compared to other tools, you can even mix the legs to output one leg on the right speaker and the other on the left.

 

 

1. Mix in stereo mode (with caller on left and callee on right speakers). We found this useful while dealing with a noisy direction. You can just turn the speaker balance down to focus on a particular channel.
2. Mix interleaved caller + callee legs
3. Merges both call legs into a single mono channel

To use these features

First ensure RTP conversations is enabled (the default). Go to “Plugins->Conversations” and confirm that the Mix Two-Way conversations is not “Disabled“. Select one of the three mixing options.

Thats it really ! Now you can capture RTP packets using H.323 or SIP protocols and three entries will now appear in the “User Objects Sheet“. Click on the call named “Conversation_XXX” and select Play or Save to WAV file.

 

Feedbacks and comments welcome.

 

[tags] VoIP, VoIP Analysis, RTP Playback, Asterisk, IAX2, SIP, H.323 [/tags]