Logical Switch and Logical Network

Hello All...................I have Hyper-V Failover Cluster based on 5 Hosts and I am managing it with VMM 2012 R2. I was slightly confused with respect to Logical Network and Logical Switch in the Fabric Settings.  I would appreciate if someone could
shed a little light on the difference between them.  Also, while there is a Logical Network defined by default (Name of the Virtual Switch of Hosts), there is nothing defined in the Logical Switch.  Which one is mandatory? Logical Network or Logical
Switch? Can I delete the default Logical Network?

Hi Nick,
Please find below link for the whitepaper mentioned by Kristian.
https://gallery.technet.microsoft.com/Hybrid-Cloud-with-NVGRE-aa6e1e9a
For a complete reference please refer below series. This covers VMM 2012 SP1 but should be fine with R2 as well.
http://blogs.technet.com/b/scvmm/archive/2013/01/08/virtual-networking-in-vmm-2012-sp1.aspx
Logical Network is defined for easier management and used in Network Virtualization where as Logical switch is used to configure networking in multiple Hosts rather than creating individual Virtual switches in each host. If it were me I'll leave the
default logical network as there is no harm of doing nothing in it.
I hope this will shed some light into your situation.
Thanks,
Janaka
Janaka Rangama MCT MIEEE MBCS (Please take a moment to Vote as Helpful and/or Mark as Answer, where applicable.)

Similar Messages

  • Problems with SRW224G4 switch and Bridged Network Cards

    Hello,
    We have recently installed a SRW224G4 switch and have discovered that when we plug our DELL PowerEdge 2900 server into the switch, the switch loses all network connectivity and all of the LED's on the switch start flashing.
    The server works perfectly well plugged into another switch, but as soon as we introduce the SRW224G4 into the network, either with the server plugged into that switch or any other, the problem re-occurs.
    The only way we found we could eliminate this issue was if we disabled the Bridged Network connection on the two network cards on the server. If we do that, everything is fine, except the network performance of the server has dropped significantly.
    The server is plugged into the 1GB ports on the switch, although we tried it on the 100MB ports and received the same problems. The switch reports that the ports are running at full-duplex.
    Has anyone noticed this behavior before, and more importantly been able to rectify it.
    Thanks in advance for your assistance,
    Paul

    I had this problem as well with any Linksys 2024 or rackmountable switch..  The trick is, you need to use the network cards management software to "team" or bridged the 2 NIC's otherwise the switch detects a loop and the whole thing locks up. So lame...  Windows built in bridge mode stinks dont use it.  When you use the Intel management software or Dell or HP's NIc management software you have the option to actually choose "redundant mode" where you can pick a Nic to be the primary, or you can choose Load Balancing where you can essentially double your throughput by joining the 2 nics.
    In Windows 2008 Server, you actually do this by going to the Properties on the NIC in  Device Manger.  the software controls are now built right into the driver.  pretty neat.  2003 you can check Device Manager the same way but not sure if it's the same as 2008, you might need to run the actual NIC management app.
    Hope this helps
    fdigi 

  • Creating Logical Networks and Switches via SPF

    Hi,
    Is it possible to create Logical switches and logical networks in VMM by calling SPF REST APIs. I can see only a GET API for logical networks and none for Logical switches. If they exist can someone point me to a link to the documentation?
    Thanks,
    Venky

    Hi
    You can only get logical network information -
    http://msdn.microsoft.com/en-us/library/dn470018.aspx
    The purpose of SPF is to be used as web service for Tenants. As logical networks and switches are objects that are maintained by administrators they cannot be managed by SPF. Logical networks have get operation because you might want to create VLAN-based
    VM Networks depending on what is configured in Logical networks. For administrating logical switches and networks administrators will use PowerShell or the VMM console.

  • Removing Logical Networks and Subnets from Hyper-V Host Network Adapters that are greyed out

    Hello All
    I am new to SCVMM 2012 R2 and I have create a Hyper-V Cluster and now creating Logical Networks and Port Profiles and Logical Switches. I have figured out how to create all of them properly now, but I have made some mistakes in the past. I have a Logical
    Switch created and assigned to network adapters on the hosts. Now I am trying to add the other switches to other adapters, but I have associations on network adapters to Logical Switches and Subnets that are not correct and need to be removed so I can add
    the correct ones, but in the console the network adapters that I need to work with the information is grayed out and I can't change the information. 
    I am not an expert at Powershell. Below you can see a Logical Network and Sunets associated
    to a Network adapter. Can someone help figure out how to remove the information so I can assign the correct Logical Network?
    I woul so much appreciate this. I know there is a way to do this in
    PowerShell but I don't know Powershell that much. I
    am savoing all the
    powershell scripts ever time I configure something in SCVMM but I have had no luck trying to
    revearse what I did.
    Help Please
    Christopher
    Christopher Scannell

    This shows that an Uplink profile associated with this host, links to these logical networks. In order to remove this successfully, you must remove the logical switch and uplink deployed to the hosts.
    For a complete overview and guidance on the required configuration, have a look at the whitepaper we created. 
    http://gallery.technet.microsoft.com/Hybrid-Cloud-with-NVGRE-aa6e1e9a
    -kn
    Kristian (Virtualization and some coffee: http://kristiannese.blogspot.com )

  • Logical network to physical network mapping (subnets and VLANS) in SCVMM 2012 R2

    In much of the blogs, documentation and literature on VMM, there are examples of deploying multiple logical networks onto one physical network i.e. Cluster (logical) + Storage (logical) + Backup (logical) + Live Migration (logical) + Management
    (logical) on top of Datacenter (physical).
    Does this mean it would be possible to have one (physical) flat VLAN-less network with one subnet and then have all those logical networks (with subnets and VLANs) on top of it? Even with a simple unmanaged L2 switch that doesn't support VLANs itself?
    If not, just how do you map multiple logical networks to just one physical network? How does that work in practice? Is a L3 switch needed to route traffic between logical networks for example?

    Hi. VMM Networking may be overwhelmed for the most, at first. But you really need to understand the modeling here and how things are related to each other. Especially if using NIC teaming in WS 2012 (and R2) together with this mix.
    I suggest that you read the following whitepaper where we explain how to setup networking in VMM (also to support network virtualization, but that is absolutely not mandatory): http://gallery.technet.microsoft.com/Hybrid-Cloud-with-NVGRE-aa6e1e9a
    -kn
    Kristian (Virtualization and some coffee: http://kristiannese.blogspot.com )

  • Removal of Virtual Switch Logical Networks

    Hi,
    I've recently managed to get SCVMM 2012 R2 up and running and it's currently managing 2 hosts in a cluster. I've migrated both hosts onto a logical switch, and I'm now at the stage where I'm ready to delete the LN's created for the per-host switches. I've
    deleted the Virtual Switches and deleted the VM Networks associated with the switches successfully, but when I go to delete the LN's associated with the Virtual Switches, I get a 25100 error.
    In dependencies, it shows that each LN has one of the hosts as a dependency but when I log into the hosts, there's nothing to indicate that they're in use. Is there any way to fix this or do I need to manually delete them from the database?
    Cheers,
    Ed

    Hi Sir,
    >>In dependencies, it shows that each LN has one of the hosts as a dependency
    If you mean this :
    Please open the hosts' properties then check the hardware option and uncheck the "logical network connectivity":
    Best Regards,
    Elton Ji
    Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected] .

  • How do I get ipackets and opackets statistics for logical network interface

    I do a kstat_lookup() and kstat_read() to get the ipackets and opackets statisti
    for the physical network interfaces like hme0.
    However those statistics are not available via kstat for logical interfaces such
    as hme0:1.
    I notice that netstat -ai reports numbers for ipackets and opackets for
    logical network interfaces so that information must be available
    programatically but where?

    netstat(1M) uses private ioctl(2) calls to a prepared /dev/arp to extract SNMP MIBs
    that contain this information. I agree that it should be published via the kstat interfaces
    as well.
    - Stephen
    Stephen Hahn, PhD Solaris Kernel Development, Sun Microsystems
    [email protected]

  • Bare Metal Deployments: The BMC can't have IP Address defined in logical network?

    I have defined a logical network, a logical switch, and a port profile.  I apply the logical switch (the NIC teaming settings) and a virtual network adapter that inherits the hosts network configuration (pass through config. no software defined networking)
    to each of my Hyper-V hosts successfully.
    The issue occurs once I have defined that logical network, I can no longer deploy bare metal hosts because the BMC obtains an IP within that logical network.  You see the BMC IPs and NICs are on the same subnet/VLAN.
    What's the best practice or perhaps best method to get around this issue?

    I am not sure if I follow you on this one.
    You have created a logical network for your BMC in VMM? If so, why have you done that?
    The bare-metal process requires both PXE and
    DHCP during this process, and the scope should therefore be in DHCP and not VMM for this purpose. 
    Can you try to do that? (If this is a lab environment, you could add the DHCP service to your PXE server or even VMM server).
    -kn
    Kristian (Virtualization and some coffee: http://kristiannese.blogspot.com )

  • Logical Network issue

    I am using SCVMM in windows 2012 R2 standard and Hyper-V role enabled in Windows 2008 R2 sp2.
    I've created logical netwok in VMM but here it is not deploying the local switch in hyper-v, I need some assistance on logical network communication between vmm & hyper-v.

    It's hard to tell where you are in the jungle of configuration here, but I would recommend you to read the following whitepaper which covers the entire setup of the logical network/logical switch deployment to the hosts:
    https://gallery.technet.microsoft.com/Hybrid-Cloud-with-NVGRE-aa6e1e9a
    I did also do this session at TechEd last year, showing how this should be deployed from the ground up:
    http://channel9.msdn.com/Events/TechEd/Europe/2014/CDP-B327
    And last but not least, here's a Powershell script (purely demo based, unpolished, ripped rout out of an open - ongoing editing ISE session :-) ) that shows how these things are related to eachother:
    https://gallery.technet.microsoft.com/SCVMM-Fabric-Controller-a1edf8a7
    -kn
    Kristian (Virtualization and some coffee: http://kristiannese.blogspot.com )

  • Chaning the Logical network of a VM network

    I have 3 x 2012 R2 hyper-V hosts in the same data centre.
    They are stand-alone and some virtual machines use Hyper-V replica.
    Each host has 4 NICs, 1 for management (not available to Hyper-V), 1 for "external" services (physically plugged into DMZ switch) and 2 for internal services.
    In SCVMM, under the "VM Networks" node, I can see External, Internal1 and Internal2, each are associated with a logical network that auto-created by SCVMM.
    I would simply like to use "External" and "internal" as my logical networks. I have created these logical networks, associated the IP ranges, but am unable to change association in the "VM networks" area.
    What am I doing wrong ?
    Thanks.

    Hi Sir,
    Yes , you can not change that association in "VM networks" .
    I would suggest you to refer to following article regarding " Configure NIC teaming using VMM ":
    http://blogs.technet.com/b/privatecloud/archive/2013/04/03/configure-nic-teaming-and-qos-with-vmm-2012-sp1-by-kristian-nese.aspx
    It will help you understanding the function of common "network configuration" part  .
    Best Regards,
    Elton Ji
    Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected] .

  • One logical network per VLAN?

    I am not using network virtualization and currently using traditional VLANs. Now what I did currently is I have one logical network, one network site, and in that network site contains all my VLAN's (23 right now).
    What I noticed is when I create a cloud I can't choose the network... I can only choose the logical switch which will give that cloud complete access to all VLAN's right?
    So in my situation would it be better to just create a logical switch for each VLAN we have? Keep in mind this is a multi-tenant environment so that is why there are so many VLANs. 
    Most of the videos I find go into Network Virtualization which is not what I'm trying to do :-(

    Hi se
    This is how I do it (I don't have WLSE):
    - Create a ssid per vlan in the AP.
    - Configure switch to AP connection as a trunk.
    - If needed, configure helper addresses in switch.
    If you need routing between VLANs, you will need a router, afaik AP cannot do it.
    HTH

  • VMM2012 SP1 console giving error message when trying to assign logical networks

    Hello,
    we are encountering the following Situation.
    I have a new Hyper-V Cluster (2012) with at that time two nodes.
    When I try to configure the Logical Network connectivity on a virtual Switch (Preparing the use of multiple VLANs) it works on one of the nodes but on the other one we are getting the following error message:
    Virtual Machine Manager
    VMM is unable to process one of the provided parameters for the cmdlet (Set-SCVMHostNetworkAdapter):
    Cannot convert 'System.Object[]' to the type 'Microsoft.SystemCenter.VirtualMachineManager.HostNetworkAdapter' required by parameter 'VMHostNetworkAdapter'. Specified method is not supported.
    ID: 12416
    Does anyone has an idea what I am missing here?
    Thank you
    Sascha

    Could it be possible that your network adapter does not support VLAN tagging?
    I've run into this issue in my lab using consumer oriented NICs and trying to VLAN networking. A good test would be to do the following:
    Go to Hyper-V Manager
    Create a Virtual Switch and set it to a VLAN.
    Do you get an error message? If so, your NIC (or NIC driver) does not support VLAN tagging. If not, then you are fine and you have a problem with VMM somewhere.
    This issue can also occur due to bad drivers on a NIC card as well.  However, for troubleshooting purposes, you will want to go down to the lowest level (Hyper-V Manager) to make sure that this isn't a Hyper-V issue and really is a VMM issue.
    Hope this helps!
    -Bill

  • Logical Network not showing up in Cloud Settings

    In my SCVMM environment, I had the default Logical Network that gets added as soon as you add a cluster or host into it. Since, I wanted more Networks like DMZ Network and Networks based on Departments, I went ahead and created those in the Logical Network
    and defined IP Pools in it so that When I provision a Virtual Machine through Windows Azure Pack, Users can be see all the Networks.
    I am facing a problem when I try to add the Logical Networks in the Cloud.  I am only seeing the default Logical Network and unable to see the Logical Networks that I created manually?  What could be the reason?  How can I troubleshoot it?

    I don't know if they have been uploaded or matched.  I did see the tracks on my phone of the new album I imported into my computer.  So I think some syncing has ocurred.  But there is no download button on my phone like there is for other tracks I have uploaded.  All the tracks are greyed out and I can't play them on my phone?  Any ideas?

  • Logical Network question

    I created a logical network on one of my OVS 3.1 servers, but I'm not sure how to use it. I already have a standard network created for my VMs but I thought that I could use a logical network for the VMs on one physical server to all talk to each other more efficiently. I just don't know how to make that actually happen.
    After I created the logical network my VMs on that server all created an eth1 device. I haven't done anything to further configure eth1 on those VMs and I'm not sure what I should do. Has anyone used a logical network in OVS effectively?
    Here's an example of the ifconfig output for eth1 on one of my VMs:
    eth1 Link encap:Ethernet HWaddr 00:21:F6:AA:00:19
    inet6 addr: fe80::221:f6ff:feaa:19/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:100 errors:0 dropped:0 overruns:0 frame:0
    TX packets:27 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:6600 (6.4 KiB) TX bytes:5927 (5.7 KiB)

    My understanding is that you would go into Networking, and select the network where these servers all exist... and remove the VM role from that project. Then you can add these servers to the new network.
    But you may not be able to do that with the servers up.

  • Logical network advice

    Hello Guys
    I have recently installed scvmm 2012 r2 and would like to manage a few hyper-v hosts etc...However since installing i have realised that i may have a problem setting up the logical networks. Let me explain. Currently our department shares a large network
    with other units with the overall dhcp and dns structure being outside my direct control. for example, we get assigned an ip based on the mac of the vm, client or server. now this has implication when it comes to creating the ip pools etc...in vmm, since i
    dont want to have it assign ip's to machines that have already been assigned ip's by the main dhcp pool (i.e. want to avoid conflicts).
    is there a way in which i could still make use of scvmm in this case?

    Hi
    Read this, hope it explains it for you:
    http://blogs.technet.com/b/scvmm/archive/2013/02/14/networking-in-vmm-2012-sp1-logical-networks-part-i.aspx
    Hope this helps. Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Maybe you are looking for