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NTP Configuration

The right time synchronization is very important while troubleshooting different kind of problems. Most network components have the option to synchronize their time with a time server on the internal network or the internet. This post shows how to configure NTP with the right time zone on Cisco and HP ProCurve components. The example configurations use the NTP servers from


clock timezone MET 1
clock summer-time MEST recurring last Sun Mar 2:00 last Sun Oct 3:00
ntp server
ntp server

HP ProCurve

time timezone 60
time daylight-time-rule Western-Europe
sntp server
sntp server
timesync sntp
sntp unicast
sntp 720

HP ProCurve licenses

During an check-up on a network, I looked at the configuration of two HP ProCurve 5400zl switches. One of these switches functions as the core switch and default gateway for the various VLANs. To improve the availability and redundancy of the default gateway, I mentioned the configuration of VRRP (Virtual Router Redundancy Protocol).

On of the two core switches had the opportunity to enable VRRP with the command: router vrrp. The other core switch didn’t had the option to enable VRRP. I found this a bit strange, because both switches have the same hardware properties and firmware version. I spent some time looking at the HP Procure website.There I noticed that theHP ProCurve 5400zl switches require a Premium License to enable VRRP. I didn’t even knew that HP ProCurve switches had different kind of licenses, but after contacting the supplier and obtaining the license, I could enable VRRP and improve the availability of the network.

Cisco Networkers 2008

Cisco Live (aka Cisco Networkers) 2008 has opened the registration for Orlando, Florida.

Cisco Live is Cisco’s annual IT and communications conference. The conference features Networkers, the premier education and training program, and other special programs designed to meet the diverse needs of today’s IT and communications professional from increasing technical proficiency to understanding the impact of technology on business. My collegue ELM and myself already registered for this great conference.

I heard a lot of good things about Cisco Live, especially about the technical presentations. The conference is from June 22 till June 26. I am really looking forward to meet and talk to (experienced) people and learn more about (upcomming) technologies.