Still trying to make a lab

Hi ,

Since the last update , I’m still working on deploy a home lab with GNS 3 and Vmware image. Still no luck as last week one of my servers crashed. The result was that one DD3 memory is dead …. I can’t tell you how it is funny to discover that once it happened , nothing stay anymore stable. No more possibility to register my remote sites and phones are very slow on the network. I can imagine that GNS3 is taking soo much memories that it sucks my network.

Now still looking to have a real hardware, I’m nearly on the process to have one but still missing some E1/T1 cards to perform it .

Will try to chase for extra-hardware ….

See the results soon 😉

GNS3 – Cloud Interface Trunk

After adding some network adaptor (DUB-E100) on my server to make the trunk available for my 3 sites , DOT1Q was not able to work on the config …. Damned I figured out at this point that I could pass my vlan over this link .

After more troubleshooting and thinking, I came to the point to enable ISL instead of DOT1Q , and after this my trunk was really up and useful as it passed now the vlan information ….. woohoo .

Can continue right now on implementation ….


Windows 7 – Firewall issue with GNS3 routers


When I have connected my routers defined in GNS3 with a cloud pointing to my network card . HQ was able to access my LAN because it shares the same LAN .But in my Frame-Relay WAN , even if  I have all the networks in my routing table , it is impossible for a Branch location to ping something on the real network where you have Windows 7 or Windows Vista machines.

So after some reseach, I have found this interesting note:

Even if it is related to Windows Vista and even if you have some warning , it is applying this little patch. When , you apply under the DOS prompt the following command : netsh firewall set icmpsetting 8 enable . It will create depending on your topology  a new rule inside the Firewall “Networking – Echo Request(ICMPv4)”. This rule will be enabled.

In case if you want to revert your manipulation , as the command to revert back present in the previous document is not working , go then top the control center and find the previous created rule or rules and disabled it …

With this patch , you can enable your Windows 7 to icmp request.

Routers and Voice Lab – Part 2

Yes Definitively , it will be difficult to have dedicated hardware so after more investigations , GNS3 is amazing and can do a bigger part of the job but need again to emulate this on the server so it is taking more resources. Take in mind that you can’t play with DSP so PRI connections and so on.

Think about 5 servers and a router Topology with at least 4 routers ( HQ, Branch 1, Branch 2, PSTN/CME). So it is becoming huge to maintain for hardware resources !!!

Routers and Voice Lab

Ok It is now time to start slowly on the lab again .

As It seems also clear that I will not have specific dedicated hardware , I will also try to push the discovery of GNS3 as we can already simulate a lot with this tool.

So tonight , I will investigate more in GNS3….

Motivation is still here and I will pass my exam before the end of year . Probably end of October or beginning of November .

Translation-Rule : Quick Overview

Translation-rule are the best IOS tool that you can use to make digit manipulation. In order to execute them , here are the required steps:

  1. Build your translation-rules
  2. Build your translation profiles
  3. Apply your translation-profiles in incoming or outgoing or both mode

Here are where you can apply yoru translation profiles:

  • All voip calls
  • a particular dial-peer
  • ephone-dn
  • interface
  • trunk-group
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