Category: Cisco
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Cisco – VPN Issues From A 6509
I’m doing IPSec tunnels from a 6509 at a remote facility to an ASA. The tunnel would establish, traffic would send from the 6500 to the remote client, the remote client would answer, but it would never go back through the 6500…strange. I noticed that the ASA said that the connection was using NAT traversal,…
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Configuring NTP Client On Callmanager 4.X
CM 4.X doesn’t use the standard windows 2000 NTP client W32Time, it uses XNTP. To configure it, you edit a config file and restart the NTP service on the server. C:\WINNT\system32\drivers\etc\ntp.conf server 207.171.7.152 # Set Local Clock to Authoritive Time Source server 149.20.68.17 # Set Local Clock to Authoritive Time Source fudge 127.127.1.1 stratum 5…
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Painfully Embarrising IT – Oh The Shame…
So I got a comment about a netflow collector a while back called scrutinizer by a company called plixer. This looks like a decent enough product, but that’s not what caught my eye. They had a link to some videos by “Mix Master Mitch”. This is some of the most painfully embarrassing IT stuff I’ve…
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Gathering Information With Cisco IP SLA and Cacti
Modern enterprise networks often span provider networks, be it IPSec tunnels through the internet or a leased MPLS connection. If one is experiencing problems, how can you definitively diagnose these issues? There are few tools cheaper and more effective than using Cisco’s IP SLA ( IP Service Level Agreement), formerly SAA and RTTMON. In a…
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Cisco – % telnet connections not permitted from this terminal
If you log into a Cisco device and attempt to telnet to another device and you receive the following message: % telnet connections not permitted from this terminal Then you need to modify your vty output line. Change vty 0 5 transport output none to vty 0 5 transport output telnet
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Inbound Calls Forwarded to External Numbers Won’t Pass CallerID(or Fail to Dial Out)
This Cisco article describes the problem exactly! The scenario: I set my desk phone’s call forward all to forward to my cell phone. Someone from the outside calls my desk and it forwards to my cell. The number ringing on my cell phone looks like the generic PRI, and not the caller or my desk…
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Callmanager 4.X CDR Processing Problem
If you are having CDR issues you should check this Cisco CDR Troubleshooting guide. CDR generally: Saves to text files Then writes text files to the CDR database Last it writes the CDR database to the Art database We have a custom set of files that crunches the info from the Art DB table to…