Crucial Paradigm Australia Official Blog
networking
World IPv6 day is a “test flight” for IPv6 across the internet, with large networks such as Google, Facebook, Yahoo!, Akamai, and many others taking part to test IPv6 connectivity across a period of 24 hours. This is to help raise awareness and push network operators, OS vendors, software vendors, content providers, and other organisations which provide software or hardware that rely on the IP protocol to start supporting IPv6. (more…)
One thing you notice online when working in virtualization is the lack of resource explaining the engines / drive trains / gear boxes what go into making system virtualization possible.
This actually goes for a lot of things, there will always be more howto’s on technical webserver stuff for linux than for windows… etc etc.
Today I am going to explain a bit about the relationship between processes and objects that come together to make your virtual machine work.
If you have had trouble getting access to the Distributed vSwitch Controller (DVSC) in XenServer, then you are not alone!
While doing some testing on XenServer’s vSwitch and following XenServers documentation we noticed it was not possible to using the “Switch to Graphical Mode” that was referenced in the documentation. While the “Switch to Graphical Mode” was there in XenCenter, it was grayed out. Rebooting, or re-importing the DVSC appliance did not help. (more…)
If you ever wondered how to remove the physical NIC configuration on a Citrix XenServer machine, this is how you can do it:
xe pif-reconfigure-ip uuid=XXXXXXXXXXX mode=none
Where “XXXXXXXXXXX” is the uuid of the NIC to remove the configuration from, this can be either a NIC or a bond. To find out the NIC/bond uuid you can run the following command:
xe pif-list
A quick easy way to clear an IP from the ARP cache on an IOS switch/router is:
clear ip arp [ip address]
You can easily reset the interface counters on an interface by running the following command:
clear counters GigabitEthernet 0/5
Where GigabitEthernet 0/5 is the port you wish to clear the counters for.
Question: How do I monitor all traffic on a Linux host, or for a particular port?
Answer: You can use the application tcpdump, here are some examples:
Monitor a particular interface:
tcpdump -i eth0
Monitor a particular port:
tcpdump -i eth0 ‘port 9996′