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Category Archives: Virtualization
Update GNS3 server on GNS3 IOU VM
GNS3 Sourceforge account provides an OVA image ready to run gns3-server for those who want to use Cisco IOS on Unix images . However, at the time of this writing, the gns3-server version is outdated (1.3.3). The client must have … Continue reading
Posted in Computer, Linux, Networking, Virtualization
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VMware and Windows poor TCP performance
I have had a strange issue lately with Windows servers on VMware vSphere 5.1 hosts. Throughput of TCP connections between some virtual machines were very very slow, barely 10 mbit/s . The behavior was easily reproducible : just start an … Continue reading
Posted in Computer, Microsoft, Virtualization, VMware
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VMware vCSA 5.1 password expiration
A few months ago, I was unable to login on my vCSA. At that time, I thought it ws a glitch, I rebooted (didn’t fix the issue) and changed the password of the users, which fixed the issue. Recently, I … Continue reading
Posted in Computer, Linux, Virtualization, VMware
Tagged security, suse, vcenter, vcsa
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LSI Megaraid Storage Manager and VMware ESXi
I had to configure a bunch of ESXi 5.1 servers with LSI 9240-4i hardware RAID controllers the other day. This RAID controller is perfectly supported in ESXi 5.1 but it lacks the monitoring features. To have these, you need to … Continue reading
Posted in Computer, Networking, Virtualization, VMware
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Nagios and SNMP traps
It has been explained many times over the internet, so I won’t cover that. One thing you have to pay attention to is, if you run snmptt as a daemon, be sure that it has the right to write to … Continue reading
Posted in Computer, Linux, Networking, Virtualization
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Don’t use SQL Server 2012 with VMware vCenter and modules yet
Update: I just saw that since April 25th, SQL Server 2012 and Windows Server 2012 are supported by VMware vCenter 5.1U1 . All information is available here : blogs.vmware.com/vsphere/2013/04/vmware-vcenter-server-5-1-update-1-released.html Original November 21th 2012: While it is working with the SSO … Continue reading
Posted in Computer, Microsoft, Virtualization, VMware
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Ubuntu 12.04 on HP Microserver N40L
Just some thoughts and things I’ve done. The hardware is the following: the Microserver itself, 2x 4GB DDR3, one 16GB USB flash drive, some 2TB SATA hard drives, Logitech S-150 USB speakers, and a GT520 HDMI+DVI graphic card. Installation on … Continue reading
Posted in Computer, Linux, Virtualization
Tagged linux, monitoring, network, precise pangolin, ubuntu
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vSphere NIC teaming, Cisco router and HP Procurve switches
So, like me, you want to have redundancy for your virtual machine network. For my lab setup, I use a refurbished Cisco router 3825 with two gigabit interfaces, two Procurve 2810-24G and a small server with 4 gigabit interfaces for … Continue reading
Posted in Computer, Networking, Virtualization, VMware
Tagged cisco, esxi, etherchannel, failover, hp, lacp, load balancing, network, portchannel, procurve, redundancy, supermicro, teaming, trunk, vmware, vsphere
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vSphere CPU performance monitoring
Vos machines virtuelles sont lentes, vous pensez que le CPU n’est pas en cause parce que vous avez une utilisation faible des pCPU ? Regardez-y à deux fois, il se pourrait que vos VM attendent du pCPU disponible! Pour vérifier … Continue reading
Posted in Computer, Virtualization, VMware
Tagged cpu, monitoring, performance, ready, vcenter, virtualization, vmware, vsphere
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VMware : migration de Windows
Yo. Si vous voulez migrer des Windows vers une VM VMware, vous rencontrerez sans doute le fameux BSOD 0x7b. Le problème vient du fait que Windows n’a pas les infos pour gérer le disque. Pour aider à la résolution du … Continue reading
Posted in Computer, Microsoft, Virtualization, VMware
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