Recently there are many confusion about these new terms VN-Link & Cisco nexus 1000V which been widely communicated to the IT user groups. Where were the confusion come from? Most of the time, we are getting confuse about what is VN-Link meant by Cisco. Below is some short description you may want to refer to.
Cisco Nexus 1000V is a enhance virtual distributed virtual switch which integrate to the VMware vSphere 4. With Cisco Nexus 1000V, you will contain VSM and VEM, which VSM will be the virtual appliances that host the management of Nexus 1000V, and VEM will be installed on each ESX host that been connected to the Nexus 1000V. I will not go in too details about Nexus 1000V in this post as my intention is to clear up the confusion on the VN-Link meant by Cisco.
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Some interesting finding to share during the last migration I did. I was performed the cold migration for all the virtual machines on the production. Before we migrated over to the new SAN storage, all the current virtual machines are running with thin provisioning enable from vSphere 4. During the storage migration process, you will need to choose either same as source, thin provision or none thin provision. I had chosen same as source option and perform the storage vmotion. After the storage vmotion done, I realized that the virtual machine had no longer with thin provision enable.
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Just found this from Duncan’s blog today and I think is important to share with every VMware administrator. The security hardening reference guides are available from VMware now. You can read the full details from here. I will suggest all the VMware administrator to read this and consider to implement the necessary configuration to secure the virtual infrastructure. These documents are not final yet and still in draft version but I do find it is helpful for everyone to understand and consider about the security hardening from every aspect.
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Just came across the release note from Cisco and VMware about the latest version Nexus 1000V R1.2 for VMware vSphere 4. According to the original blog there are new improvement on the area below
- GUI setup following software install
- Layer 3 control between VSM and VEMs
- Virtual Service Domains for classifying and separating traffic for network services
- iSCSI Multipath—supporting multipath feature introduced in vSphere 4
- XML API for developing client apps for managing/monitoring the Nexus 1000V
- DHCP Snooping for validating DHCP messages and filtering invalid responses
- Dynamic ARP Inspection for validating ARP requests and responses
- IP Source Guard for filtering traffic on interfaces to valid MAC and IP addresses
- MAC Pinning for assigning Ethernet port members to particular port channel subgroup (where upstream switches do not support port channels)
- Static Pinning
There are more new features in the latest release and please read more from here.
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VMware had officially released the vSphere 4 update 1 yesterday. There are many new support features and also bug fixes. Is time to take a look for a major upgrade this month to overcome some challenges we faced with the previous version.
Please view more information from the release note.
Beside the bug fixes, there are some new key highlight here too.
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