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Uncategorized | Cisco Collaboration

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 ….

🙂

CTI Route Points and Ports – Partition and CSS Approach

Pay attention that normally the order of the partitionins is always L1,L2,L3, D1,D2,D3 , where Lx are the partitions assosiated to the Line model and Dx are the partitions associated to the Device model.

So this order will give you the order/ priority in case of tie-break !

In the case of CTI Route Point or CTI ports , the order is changed by the following D1,D2,D3,L1,L2,L3 …. Please recall this if you are involved in a troubleshooting with these elements !

Windows 7 – Firewall issue with GNS3 routers

Hi,

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: http://www.howtogeek.com/howto/windows-vista/allow-pings-icmp-echo-request-through-your-windows-vista-firewall/

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.

Operations and Network Management Tools

Here are a list of the different tools that you can use :

  • CDR Analysis and Reporting tool (CAR) : is used to generate CDR reports and so on
  • DBHelper : is used to fix SQL replication issue
  • Dialed Number Analysis (DNA) : is used to analyze your dial plan
  • Dick Tracy : is a catalyst troubleshooting tool
  • Event viewer : Windows system tool to see application, system and security events
  • Perfmon : Windows system tool to see and monitor counters in real-time
  • Q931 Translator : it is a tool to decode Q931 messages of the ISDN/H323 stack
  • Quality Report Tool (QRT viewer) : it is a reporting tool for quality purposes
  • Real-Time Monitoring Tool : is an extended plugin which can view Call Manager Serviceability counters in real-time
  • SDI Traces : CCM traces which provide detailed diagnostic information relative to call processing , registration,digit analysis, call flows and all protocols related and so on
  • SDL traces : These are traces which are the transition levels between all nodes. It is essentially used by the tac
  • SQL Enterprise Manager : it is the SQL console tool

Modem Relay / Modem Pass-through

As for fax-relay, the gateway demodulates the signal sent by the modem and send it over IP network by using the Simple Packet Relay Transport (SPRT) protocol. The remote gateway process it at the reverse side.

Modem pass-through is similar to pass-through as everything is sent in-band.

Store-and-forward Fax

Store-and-forward fax on IP networks operates like email and so can deliver to servers or remote fax.

T37 is the ITU standard for store-and-forward fax transmissions.So a fax is converted into a TIFF attachment and sent to the network (it is the onramp gateway).Then the TIFF is sent to a server or an offramp gateway.