Help understand Jumbo frames

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• EqualLogic SAN and Jumbo frames

  I can't get the jumbo frames to work on our Equallogic PS6000.  We have the following configuration PS6000-> Dell PowerConnect 6248 (bunk)-> Windows 2008 Server.

  The network cards on the SAN has been set at 9000 MTU, ports on switches are set to MTU 9216 and the NIC on Server 2008 is fixed to 9014 with active RX & Tx flow control.

  When the server connects to the SAN, newspapers account connection iSCSI target to the initiator "172.21.X.X:3260, iqn.2001-05.com.equallogic:0-8a0906-xxxxxxxxxxx-23a001a955452af6-server1" ' 172.21.X.X:49156, iqn.1991 - 05.com.microsoft:server1' managed, using the length of the standard framework.

  When I ping the SAN of Server 2008 with a shitload of 8972 bytes, it works very well.

  C:\Users\system>ping 172.21.x.x f-l 8972
  Ping 172.21.x.x with 8972 bytes of data: reply from 172.21.x.x: bytes = 8972 times<1ms ttl="255" reply="" from="" 172.21.x.x:="" bytes="8972"><1ms ttl="255" reply="" from="" 172.21.x.x:="" bytes="8972"><1ms ttl="255" reply="" from="" 172.21.x.x:="" bytes="8972"><1ms ttl="">

  Why 8972?  Told that some genius on the internet.  Any help would be greatly appreciated.

  Well we got it to work.  On Server 2008, we have Broadcom and Intel network adapters.  For our tests, we were just using the Broadcom NIC.  Properties Advanced NETWORK adapter, we initially have the value package Jumbo 9014 and it did not work.  So, we opened the Broadcom Advanced Control Suite that came with the NIC and searched and found that there are two parameters that need to be addressed.  There is a jumbo packet definition which has been set at 9014, which is what we wanted it in the advanced NIC Properties.  There is another parameter, MTU, which can be seen on the advanced NIC Properties.  It has been set at 1500.  Once we define to 9000, frames jumbo started working.  We then uncabled Broadcom NIC and wired the card NETWORK Intel and the value of frames 9014 on advanced network adapter properties.  Once we have that frame has worked on this NETWORK adapter, no other measures were needed.  If it's working now.  Thanks to everyone for their help.

• Best practices of Jumbo frames

  Hello

  I'm looking to use a pair of N3048s in a branch, as the heart of the network and for iSCSI (connected to a new equallogic).

  If I understand correctly, you can set the jumbo frames on the basis of a single port so it must be enabled on all ports.

  Will this cause a problem with the LAN network (i.e. not an iSCSI storage) that none of the devices are configured to use frames?

  Bravo for any advice,

  Huw

  It will not cause any problems. Frames allows the switch works with larger packets. If the switch receives a smaller package, it will be the leash at this size and it transmits on. If a larger packet is sent to a device that cannot receive the biggest package, then the package will be broken down into smaller.

• Enabling Jumbo frames on VMXNET3 adapter in Windows Server 2012

  Hello everyone on the forums of wonderful Equallogic :)

  We have a PS4100X of the virtual computer running on vSphere 5.1 EQL. Everything works very well, and we are about to migrate a VM 2012 SQL our database. I did some research on the issue of whether we should allow the frames extended on the VMXNET3 adapter in the virtual machine.

  Reading this white paper, it seems there are large performance benefits to enable jumbo frames and a few other options in the NETWORK adapter settings:

  http://en.community.Dell.com/TechCenter/Extras/m/white_papers/20403565.aspx

  Just curious as to how other people and if they saw an improvement in performance. Someone at - he had experience with this?

  Thank you

  Lee

  Frames being good or bad, is highly dependent on the switching infrastructure.   If the switches do not manage flowcontrol and frames, then performance could be worse with frames enabled.

  If the switches are not on the list certified for EQL tables, I tend to start with the standard frames, get a baseline run, then try frames gradually and do things of course worsen.

  Extended frames may provide an advantage, he will never be a huge increase, but it improves the efficiency of the network and could reduce the overhead of the processor.    Which are not mandatory for EQL iSCSI environments.

  Please check best practices with document ESX.  That can really help to maximize your performance with storage EQL.

  http://en.community.Dell.com/TechCenter/Extras/m/white_papers/20434601.aspx

  Kind regards

• Jumbo frames

  I want to know the general thoughts on enabling Jumbo frames on my 5548 (stacked 4).  I do not use frames now on any device, but I'd like to in the future.  There has traps enabled on my switches Jumbo frames?  These stacked 4 5548 are my only switches of companies, all servers, devices and clients are running.  Thank you!  -Mark

  Here's a great article discussing the Need To Know: Jumbo frames in small networks

  www.SmallNetBuilder.com/.../30201-Need-to-Know-Jumbo-Frames-in-Small-Networks

  In general the frames are set up when connecting a switch to a storage device.  You can get a good idea if you've addressed this topic in the Forum of storage.

  Hope this helps,

• How to activate traffic iSCSI jumbo frames?

  Hi all

  I have my separate iSCSI coming out of a NETWORK card dedicated to one vlan traffic.

  Now, I have activated the switch to extended frames, qnas 869 pro for jumbo frames also and I (AFAIK) activated my extended frames ESXI host.

  However on the stats of the switch, I can't have counters increase jumbo frames.  others are but not huge.

  After reading all that I Although jumbo frames can help increase performance?

  So I appreciated if you could help me!

  Thank you

  Josh

  Well some how I made jumbo frames work on my ESXI host.

  I enabled frames for each unique interface on the ESXI host and on my NAS that provides iSCSI (qnap 869 pro), I enabled frames extended on both interfaces on it.

  Now it works no problem!

• VMware ESXi4.1 with Jumbo Frames on iSCSI (how to install?)

  Hello

  I've read various articles relating to ESXi 4.1 and frames. They all pretty much say the same thing. I'm having some trouble understanding step 3 in the section "Creating a Jumbo Frames - enabled VMkernel interface" in the link below. Could break you the order for me?

  http://KB.VMware.com/selfservice/microsites/search.do?language=en_US & cmd = displayKC & externalId = 1007654

  Step 3 says: to create a VMkernel connection with Jumbo Frame support, run the command:

  esxcfg-vmknic - a-i

  My stacked switches cisco 3750G are configured for frames.

  Thank you all. This is my first post.

  Mike

  Assuming you want to create a vSwitch separated with NIC dedicated to iSCSI traffic, you should do this:

  1.) create a new virtual switch, i.e.

  esxcfg-vswitch - an iscsi switch

  2.) enable Jumbo on this virtual switch, i.e.

  esxcfg-vswitch - m 9000 iscsi switch

  3.) create a port for the VMkernel module group

  esxcfg-vswitch - a GRPE-iscsi iscsi-switch ports

  4.) create VMkernel. You must specify an IP address for use with the VMkernel, and a network mask and the MTU size, i.e.

  esxcfg-vmknic - a-i 192.168.100.1 - n 255.255.255.0 m 9000 iscsi-portgroup

  5.) associate a physical NETWORK card with the new switch, i.e.

  esxcfg-vswitch - L VMNIC5 iscsi switch

  You must run the command-line jumbos steps since there is no GUI Option - at least none that I'm aware off the coast.

• ESXi 4 has Jumbo frame support?

  I am about to install a "Iomega StorCenter Pro ix4-200r NAS' for use with a server ESXi 4 using iSCSI.

  This device supports Jumbo frame support and hoping that ESX does as well, anyone know?

  Thank you

  Rob

  I'm not sure I understand how to make a big gain - with 1500 byte MTU, it's already better than 97% (38-byte header).  Of course, there will be a reduction in the treatment of overhead (CPU utilization should be reduced a little) but toe should alleviate a lot of this - ESX (i) uses ToE?

  Unfortunately the jumbo frames are a feature under license, see here.

• Jumbo frames based on VI3 3.5 / iSCSI initiator of material?

  Hello

  Apologies if this has already been posted. If so please point me to the thread, but I just wanted to confirm with you guys jumbo frames based on VI3 3.5.

  As much as I know frames are not taken in charge for software iSCSI but it is supported for the hardware iSCSI initiators but please correct me if I'm wrong. Now what hardware initiator you recommend for jumbo frames?

  Thanking you in advance,

  Saludos,

  Jose Maria Gonzalez,

  -

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  VMware vExpert 2009

  Co-autor del Libro update1 VMware Site Recovery Manager 1.0

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  In ESX 3.5, 10 gigabit Ethernet and jumbo frame are NOT supported on storage traffic (for example, the software initiator).

  In ESX 4 are supported.

  André

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• Airport Extreme Gigabit Ethernet and Jumbo frames

  Hi all.

  Can anyone support me kindly about Gigabit Ethernet & Jumbo Frames with Airport Express?

  I currently have and use a 5th generation Airport Express and you want to buy the QNAP TS - 453 Pro NAS. In any implementation of storage NAS, Gigabit Ethernet, the frames extended as matching Ethernet card well, are all very important to achieve broadband performance, so my questions are:

  5th generation Airport Express

  
  

  • Are the NETWORK Gigabit NIC Ethernet card?
  • It also works with extended frames (QNAP NAS supports 4074, 9000 and 7418 bytes for MTU)?
  • QNAP can trunk NIC (if more then one) with the following options:
    • IEEE 802.3ad (dynamic link aggregation)
    • Balance-tlb (Adaptive Transmit Load Balancing)
    • Balance-alb (Adaptive Load Balancing)
    • others (mainly for failover)

  Is 5th generation Airport Express enough or should I think about moving to the 6th generation?

  Thank you.

  You mix up the terminology... Express and Extreme are totally different.

  The title is correct... Extreme... your question text replaces by Express... they are only 10/100... and gen only 2 of them.

  Any airport extreme Gen2 - Gen6

  Use the Gigabit ports.

  Do not support jumbo frames

  Do not support pairing.

• CRIO-9082 Jumbo frames

  Hello

  Is it possible to activate the Frames/packets lying on a cRIO 9082?

  Thank you

  PJ

  Do you use the 9082 with installed Windows or real-time? It makes a difference, because it supports jumbo with Windows frames, but does currently support installed with LabVIEW RT jumbo frames.

• The e2000 wireless router does support jumbo frames?

  I can't find (unless I missed it) and in the e2000 on how documentation set sizes of frame of reference.  Is that supported?  If so, what are the steps?

  A fact important is jumbo frames are not compatible at a speed lower than 1000 Mbps

  I think that Linksys E2000 already has Gigabit Ethernet ports.

  And I think that you can change the size of the image on the properties of the Ethernet adapter if the card is a Gigabit Ethernet card.

• How do I configure jumbo frames

  PC 3548p

  Could not find orders for frames / mtu setting?

  want to set overall n switch?

  I don't see any mention in the technical specifications for the P switch 3548 it supports Jumbo frames.  The 5500 series is the first model to offer the frames extended as a supported feature.

  Thank you

• 5524 - jumbo Frames - entire unit or only to certain ports / vlan

  Hello

  is - anyone idea, if possible to use frames only for ports specific it s?

  After enable JumboFrames, it will create a problem of common computers network traffic? I intended to create a VIRTUAL LAN to connect to the storage and r.620 (under XenServers).

  * We plan to use this unit to connect a Dell Power Vault MD3200i volumes as iSCSI offering.

  * According to our (ftp://ftp.dell.com/Manuals/all-products/esuprt_ser_stor_net/esuprt_powerconnect/powerconnect-5524_User%27s%20Guide_en-us.pdf ) switch mannual: "Activation iSCSI automatically enables Jumbo frames and allows the control of flow on all interfaces.

  Allowing the frames on the switch will allow the frames extended on all interfaces. I don't see a way on this option to activate the frames extended on a specific interface or VLAN. Allowing the Jumbo will not create any problem with common computer network traffic. If this switch is connected to another switch, it's a good idea to have some Jumbo frames enabled on the interface of switches connection also.

  Here is a white paper with some info good iSCSI.

  www.dell.com/.../Dell_EqualLogic_%20iSCSI_Optimization_for_Dell_Power_onnect_%20Switches.pdf

  See you soon

• cannot ping vmk2 on other servers with jumbo frames

  I had 3 servers esxi 5.1 configure each with 2 NICs vmk - vmk1, vmk2

  vmk1 is on fabA

  vmk2 is on fabB

  the chassis is connected to the FI and the FI, its goes directly to the heart of nexus 7 k. Frames is enabled on the core switches.

  I have CoS of vmotion gold and a Qos policy of gold with the default values shown.

  the problem is each esxi host, when I try to vmkping (vmkping s 8000 vmk1 or ip vmk2), the vmk2 of another esxi host, it does not. but the fact of vmk1.

  I checked my vmnic political and especially on fabB models and they are all set to 9000.

  any ideas here?

  I ping the host local esxi itself and vmk1 vmk2

  Tony,

  One of the things to keep in mind is that traffic of FI - A IF-E passes by the upstream layer 2 network site.  Make sure the LAN past what uplink you also have enabled jumbo frames.

  David