Windows 2003 R2 SP2 Enterprise 64-bit NETWORK load balancing

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  I hope someone can help.

  I'm looking to start to test the Windows 2008 network load balancing. This will serve a webfarm. I went through various whitepapers, and forum messages but who have a few more questions:

  1. I get VMWare recommends multicast. Windows 2008 gives you two options, multicast and IGMP multicast. Seeing that I'm not an expert in network management, I'm a little nervous about the switched. Apparently to enable IGMP Snooping on your Cisco switches eliminate this? Is this true, if so you need install your cluster as IGMP Mulicast?

  2 do you need to have dedicated NICs for the NLB cluster, separate vSwitch etc.? If this is not the case, there will be interference with the existing production network?

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  1 have not tested, but IGMP snooping is what caused problems before because the switch ports would not join the group correctly, so it is suitable to test whether the OS is ready to send packets.

  2. it is better to use separate vNIC to the virtual IP address of the NLB cluster

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• NETWORK load balancing issues

  Hi all

  It is a strange and I can't really find anything when searching. I just wanted to know if other people have seen this? and if there is a work around?

  OK, the virtual environment that I administer is quiet large and the love windows NLB developers where I prefer f5 or hardware NLB. So it is quiet assign windows NETWORK load balancing clusters in the virtual environment, the issue I encountered is if the critical path for an application passes a cluster nlb to another (so they talk to each other). If a node of each of these clusters is on the same physical host NLB rocking.

  Why?

  well windows NLB when a request is sent to the VIP address all nodes in the cluster must meet before it is executed by one of the nodes, tests that I've found is that if a node of each group is on the same host demand seams to stay internal to the ESX host, as it goes, I know where that IP address is and goes to a single node until that node is waiting for the other nodes of the cluster in order to recognize the request but they never get it the whole thing stopped and happens to expire and the performed by the team of network packet capture won't let even the host he sews.

  OK, a few rules affinity could solve this but I'm talking about 8 knots, talking to a node 4 cluster which then in turn talk to another cluster of 4 knots and im talking about another 50 like that until the point where DRS. can not move whatever it is as well that the rules are a nightmare administrave especially since only 2 machines can be in a rule.

  All hosts running ESX 4 Update 1 and running on HP blades, unfortunately we run on unicast mode, due to the size of the environment networks don't want to or can't add all switches/routers arp entries. It is configured as recommended by using unicast.

  I can reproduce this problem every time still in test. would it be because of the unicast? I don't see how.

  I would add also that it should not be 2 nlb cluster, if a server client attempts to hit the VIP of a windows NETWORK load balancing cluster and it is on the same host as one of the nodes it will expire as a single node gets applications. F5 NLB works perfectly, and when they are on hosts separate windows THAT NLB works very well also.

  Just came across this because the jobs would come about the application does not, by trying to hit the vip on the correct port for the requesting server, it wouldn't connect and the support guys would vmotion a knot and it would usually fix the issue, and if it does not pass all the nodes on the same esx host and it would work every time (I know (, but until the full time vmware resources came on board as me not doubtful we had the time to really watch)

  any ideas or comments would be great hope I have explianed the question clearly enough

  See you soon

  See: http://www.vmware.com/files/pdf/implmenting_ms_network_load_balancing.pdf

  You must use the multicast.

  André

• Network Load Balancing error

  Hello

  I have DC with 192.168.10.2 255.255.255.0 P.DNS 192.168.10.2 & ADC 192.168.10.3 P.DNS 192.168.10.2 255.255.255.0

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  "NLB Manager running on a system with all networks bound to NLB mifht does not work as expected.
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  *
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• Hi ALL, did any attempt on the virtual computer NETWORK load balancing using HYPERV on UCS blades

  I try to configure the CASE server cluster by using the Unicast NLB on the virtual machine on different blades on the UCS, it works for awhile, then he abandoned packages.

  I heard that this screenplay of unicast is not supported in the UCS when she used END-host mode in the fabric interconnet...? any attempted before.

  Would it, I use the multicast mode is that something needs to be done on the FBI62020 or the LAN switch upstream. ??

  Header note I found on the implementation of UCS for mulitcast NLBL:

  Microsoft NLB can be deployed in 3 modes:

  Unicast

  Multicast

  IGMP multicast

  For series B UCS deployments, we have seen that the multicast and IGMP multicast work.

  IGMP multicast mode seems to be the more reliable deployment mode.

  To do this, the monitoring settings:

  All NLB Microsoft value "Multicast IGMP" nodes.  Important!  Check ths by logging into EACH node independently.  Do not rely on the MMC of NLB snap.

  An IGMP applicant must be present on the VLAN of NLB.  If PIM is enabled on the VIRTUAL LAN that is your interrogator.  UCS cannot function as applicant IGMP.  If an interrogator of functioning is not present, NLB IGMP mode will not work.

  You must have a static ARP entry on cheating it upstream pointing IP address Unicast NLB on the multicast MAC address NETWORK load balancing.  This need will set up, of course, on the VLAN of the NLB VIP. The key is that the routing for the NLB VLAN interface must use this ARP entry as a unicast IP ARP response may not contain a multicast mac address. (Violation of the RFC 1812)  Hosts on the NLB VLAN must also use the static entry.  You may have several entries ARP.  IOS can use a function of 'alias' of ARP. (Google it.)

  How Microsoft NLB works. -The truncated for brevity Mac addresses.

  TOPOLOGY OF NLB MS

  NETWORK VLAN 10 = subnet 10.1.1.0/24 IP load balancing

  VIP = 10.1.1.10 NETWORK LOAD BALANCING

  Arp entry static switch advanced IP 10.1.1.10 upstream to MAC 01

  NLB VIP (MAC 01, IP 10.1.1.10)

  NODE-A (AA, MAC IP:10.1.1.88)

  NŒUD-B (MAC BB, IP:10.1.1.99)

  Using the IGMP snooping and interrogator VLAN snooping table is filled with the mac NLB address and groups pointing to the appropriate L2 ports.

  MS NLB nodes will send the responses of IGMP queries.

  This snooping table could take 30 to 60 seconds to complete.

  Host on VLAN 200 (10.200.1.35) sends traffic to NETWORK VIP (10.1.1.10) load balancing

  It goes of course to VLAN 10 interface that uses the static ARP entry to resolve to address MAC 01 VIP NETWORK load balancing.

  Since it is a multicast frame destination it will be forward by the IGMP snooping table.

  The framework will arrive at ALL NLB nodes. (NŒUD-A & NŒUD-B)

  NLB nodes will use its load balancing algorithm to determine which node will manage the TCP session.

  Only one NLB node will respond to this host with TCP ACK to start the session.

  NOTES

  This works in a VMware with N1k, standard vSwtich and vDS environment. Where surveillance IGMP is not enabled, the framing for VIP MAC NETWORK load balancing will be flooded.

  NLB can only work with TCP-based services.

  As stated previously mapping an IP unicast to a multicast mac address is a violation implied by RFC 1812.

  TROUBLESHOOTING

  Make sure your interrogator is working. Just to clarify that this does not mean that it is actually at work.

  Wireshark lets check that IGMP queries are received by the NLB nodes.

  Make sure that the ARP response works as expected.  Once Wireshark again is your friend.

  Look at the paintings IGMP snooping. Validate the L2 ports appearing as expected.

  CSCtx27555 [Bug-preview for CSCtx27555] Unknown multicast with destination outside the range MAC 01:xx: are deleted. (6200 FI fixed in 2.0.2m)

  IGMP mode not affected.

  CSCtx27555    Unknown multicast with destination outside the range MAC 01:xx: are deleted.

  http://Tools.Cisco.com/support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtx27555

  fixed in 2.0(2m)

  Solution: Change the NLB mode of operation of "Multicast" to "multicast IGMP', which modifies balancing load NETWORK VIP MAC at 0100.5exx.xxx Beach, allows to transfer occur as expected.

  Q: and if I switch to switch mode, which means all of the profile and the settings on the servers are completely exhausted and I need to recreate them. ???

  A:Cisco Unified Computing System Ethernet switching Modes

  http://www.Cisco.com/en/us/solutions/collateral/ns340/ns517/ns224/ns944/whitepaper_c11-701962.html

  -There is no impact on the configuration, you have done service profiles.  they will continue to work as expected.  Mode selector has the FI behave more like a conventional switch.  Most notable is that Spanning tree will be activated and if you have several uplinks yew, tree covering weight will begin to block redundant paths.

  You need to review your topology and what impact tree covering weight.  Generally, we at the switch port upstream defined as "edge master", you want to delete this line.

  For pre-production and laboratory environment, PDI can help qualified with the planning, design and implementation partners.  Given to review the IDP site and open a case if you need more detailed assistance.

• Network Load Balancing

  Hello

  I have some difficulty of implementation, network load balancing in VMware - I'm not sure what mode of load balancing that I use.

  I have an ESXi 5.5 - host connected to a HP Procurve switch I have configured for 2 VLANS (40,41).

  On the switch, I created 2 trunks (Trk10, Trk20) I scored on two VLANs:

  trunk Trk10 trunk 23,47

  24,48 trunk Trk20 trunk

  VLAN 40

  name of "trial".

  untagged 1-22

  Tagged 50, Trk10, Trk20

  no ip address

  output

  VLAN 41

  name "PLC".

  tagless 25-46

  Tagged Trk10, Trk20

  no ip address

  output

  Port 23 and 47 will ESXi-host1 and port 24.48 will ESXi-host2.

  40 of VLAN is to have the network 192.168.40.0/24.

  41 of VLAN is to have the network 192.168.41.0/24.

  I created a virtual switch that has 2 NICs in it, but how do I set the load balancing mode?

  The virtual machine is slow on the internet right now, and I suspect the packets going to the VLAN evil.

  (Time of balancing mode is set to 'Route based on the original virtual port code').

  Kind regards

  Soren

  Let me know if you need more information.

  Could you do a 'show interface memory' and 'show interface' on the HP switch and paste it here?

  I would remove the trunks as I don't see why this is necessary in your configuration...

  Make sure the road based on virtual port ID what origin is selected on vSwitch1 and both exchanges configured (PLC and trial).

  Remove the trunks on the HP switch and tag/UNTAG required VLANS on individual ports that were previously used in these trunks...

  Quick config necessary for HP...

  conf t

  without trunk 23,47 Trk10 trunk

  without trunk Trk10 trunk 24.48

  VLAN 1

  23,24,47,48 not marked

  VLAN 40

  Tagged 23,24,47,48

  VLAN 41

  Tagged 23,24,47,48

  WARNING: You may have a few hickups network when you do...

  What model switch you use...?

  / Rubeck

• On windows 2008 hyperV Server NETWORK load balancing

  I have IBM Blade servers there team switches running Windows server on HyperV, when I try to configure the NETWORK load on the servers of 2008r2 balancing two Windows LB is not workingworkig?

  Hello

  The question you have posted is related to professional level support. Please visit the link below to find a community that will support what ask you:

  http://social.technet.Microsoft.com/forums/en-us/category/WindowsServer

• Nexus 1000v, UCS, and Microsoft NETWORK load balancing

  Hi all

  I have a client that implements a new Exchange 2010 environment. They have an obligation to configure load balancing for Client Access servers. The environment consists of VMware vShpere running on top of Cisco UCS blades with the Nexus 1000v dvSwitch.

  Everything I've read so far indicates that I must do the following:

  1 configure MS in Multicast mode load balancing (by selecting the IGMP protocol option).

  2. create a static ARP entry for the address of virtual cluster on the router for the subnet of the server.

  3. (maybe) configure a static MAC table entry on the router for the subnet of the server.

  3. (maybe) to disable the IGMP snooping on the VLAN appropriate in the Nexus 1000v.

  My questions are:

  1. any person running successfully a similar configuration?

  2 are there missing steps in the list above, or I shouldn't do?

  3. If I am disabling the snooping IGMP on the Nexus 1000v should I also disable it on the fabric of UCS interconnections and router?

  Thanks a lot for your time,.

  Aaron

  Aaron,

  The steps above you are correct, you need steps 1-4 to operate correctly.  Normally people will create a VLAN separate to their interfaces NLB/subnet, to prevent floods mcast uncessisary frameworks within the network.

  To answer your questions

  (1) I saw multiple clients run this configuration

  (2) the steps you are correct

  (3) you can't toggle the on UCS IGMP snooping.  It is enabled by default and not a configurable option.  There is no need to change anything within the UCS regarding MS NLB with the above procedure.  FYI - the ability to disable/enable the snooping IGMP on UCS is scheduled for a next version 2.1.

  
  
  This is the correct method untill the time we have the option of configuring static multicast mac entries on
  
  the Nexus 1000v.  If this is a feature you'd like, please open a TAC case and request for bug CSCtb93725 to be linked to your SR.
  
  This will give more "push" to our develpment team to prioritize this request.
  Hopefully some other customers can share their experience.
  Regards,

  Robert

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