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Network Load Balancing - Multicast IPv6

    Question

  • I have a two servers with network load balancing. They are configured to use IGMP Multicast which works well with IPv4.  The switch correctly detects the group and sends the traffic to only the ports connected to the servers.

    However i can't get IPv6 working outside of the servers subnet.  You can access the loadbalanced IPv6 address from within the servers subnet but machines outside the subnet cannot access it.

    Does load balancing properly support IPv6?  Should it not support Multicast Listerner Discovery (MLD) to work properly with IPv6? 

    Thanks

    • Moved by Tiger Li Thursday, February 23, 2012 1:42 AM (From:General)
    • Moved by Tiger Li Monday, February 27, 2012 5:15 AM (From:Network Infrastructure Servers)
    Wednesday, February 22, 2012 3:52 PM

All replies

  • I would have ask here. http://social.technet.microsoft.com/Forums/en/winserverClustering/threads Thanks
    Wednesday, February 22, 2012 5:56 PM
  • Hello,

    also the networking forum is better then this one http://social.technet.microsoft.com/Forums/en/winserverNIS/threads


    Best regards

    Meinolf Weber
    MVP, MCP, MCTS
    Microsoft MVP - Directory Services
    My Blog: http://msmvps.com/blogs/mweber/

    Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

    Wednesday, February 22, 2012 6:21 PM
  •  

    Hi DJL,

    Thanks for posting here.

    > You can access the loadbalanced IPv6 address from within the servers subnet but machines outside the subnet cannot access it.

    Do you mean we are using an IPv6 address as the cluster IP address for incoming connection but we can’t access that NLB IPv6 address form outside the subnet ? is that a link local IPv6 address ?Can you show us the IPv6 address we are using and the network settings form nodes host ?

    Network Load Balancing Manager Properties

    http://technet.microsoft.com/en-us/library/cc771709.aspx

    I suspect it could be an IPv6 routing issue , can you check that ?

    IPv6 Addressing and Routing

    http://technet.microsoft.com/en-us/library/cc778247(WS.10).aspx

    Regards,

    Tiger Li

    TechNet Subscriber Support in forum

    If you have any feedback on our support, please contact  tnmff@microsoft.com.


    Tiger Li

    TechNet Community Support

    Thursday, February 23, 2012 5:59 AM
  • Thanks for your reply. 

    Yes - you are correct. We are using an IPv6 address as the cluster IP address for incoming connections but it can't be access outside of the subnet. The cluster has both a link-local and global address - both are only accessible from within the subnet.

    The two servers that are part of load balancing cluster both have IPv6 address assigned to their network adapters - these are accesible outside the subnet. Infact 80% of all our network traffic is IPv6 - routing is working fine between all servers, workstations and devices on our various subnets.  The problem is purley affecting the load balancing IPv6 address.

    The IP config and route tables are below.  Thanks for your help.

    Regards, Daniel

    Microsoft Windows [Version 6.1.7601]
    Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
    
    M:\>ipconfig /all
    
    Windows IP Configuration
    
       Host Name . . . . . . . . . . . . : indium
       Primary Dns Suffix  . . . . . . . : 
       Node Type . . . . . . . . . . . . : Hybrid
       IP Routing Enabled. . . . . . . . : No
       WINS Proxy Enabled. . . . . . . . : No
       DNS Suffix Search List. . . . . . : 
    
    Ethernet adapter Public:
    
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Microsoft Virtual Machine Bus Network Ada
    pter
       Physical Address. . . . . . . . . : 00-15-5D-CA-6C-04
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
       IPv6 Address. . . . . . . . . . . : 2001:630:34:1010::42(Preferred)
       IPv6 Address. . . . . . . . . . . : 2001:630:34:1010::40(Preferred)
       Link-local IPv6 Address . . . . . : fe80::4c7b:41a3:be85:e6c4%10(Preferred)
       Link-local IPv6 Address . . . . . : fe80::95f6:2da7:dcdb:1fc1%10(Preferred)
       IPv4 Address. . . . . . . . . . . : 10.0.0.42(Preferred)
       Subnet Mask . . . . . . . . . . . : 255.255.252.0
       IPv4 Address. . . . . . . . . . . : 10.0.0.40(Preferred)
       Subnet Mask . . . . . . . . . . . : 255.255.252.0
       Default Gateway . . . . . . . . . : 2001:630:34:1010::1
                                           10.0.0.1
       DHCPv6 IAID . . . . . . . . . . . : 234886493
       DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-D0-9F-CD-00-15-5D-01-14-35
    
       DNS Servers . . . . . . . . . . . : 2001:630:34:1010::10
                                           2001:630:34:1010::8
                                           10.0.0.10
                                           10.0.0.8
       NetBIOS over Tcpip. . . . . . . . : Disabled

    Microsoft Windows [Version 6.1.7601]
    Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
    
    M:\>ipconfig /all
    
    Windows IP Configuration
    
       Host Name . . . . . . . . . . . . : aluminium
       Primary Dns Suffix  . . . . . . . : 
       Node Type . . . . . . . . . . . . : Hybrid
       IP Routing Enabled. . . . . . . . : No
       WINS Proxy Enabled. . . . . . . . : No
       DNS Suffix Search List. . . . . . : 
    
    Ethernet adapter Public:
    
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Microsoft Virtual Machine Bus Network Ada
    pter
       Physical Address. . . . . . . . . : 00-15-5D-01-37-04
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
       IPv6 Address. . . . . . . . . . . : 2001:630:34:1010::43(Preferred)
       IPv6 Address. . . . . . . . . . . : 2001:630:34:1010::40(Preferred)
       Link-local IPv6 Address . . . . . : fe80::95f6:2da7:dcdb:1fc1%10(Preferred)
       Link-local IPv6 Address . . . . . : fe80::fcab:aeb9:175d:9994%10(Preferred)
       IPv4 Address. . . . . . . . . . . : 10.0.0.43(Preferred)
       Subnet Mask . . . . . . . . . . . : 255.255.252.0
       IPv4 Address. . . . . . . . . . . : 10.0.0.40(Preferred)
       Subnet Mask . . . . . . . . . . . : 255.255.252.0
       Default Gateway . . . . . . . . . : 2001:630:34:1010::1
                                           10.0.0.1
       DHCPv6 IAID . . . . . . . . . . . : 234886493
       DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-BF-55-42-00-15-5D-01-13-45
    
       DNS Servers . . . . . . . . . . . : 2001:630:34:1010::10
                                           2001:630:34:1010::8
                                           10.0.0.10
                                           10.0.0.8
       NetBIOS over Tcpip. . . . . . . . : Disabled
    

    Microsoft Windows [Version 6.1.7601]
    Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
    
    M:\>route print
    
    IPv6 Route Table
    ===========================================================================
    Active Routes:
     If Metric Network Destination      Gateway
     10    261 ::/0                     2001:630:34:1010::1
      1    306 ::1/128                  On-link
     10    261 2001:630:34:1010::/64    On-link
     10    261 2001:630:34:1010::40/128 On-link
     10    261 2001:630:34:1010::42/128 On-link
     10    261 fe80::/64                On-link
     10    261 fe80::4c7b:41a3:be85:e6c4/128
                                        On-link
     10    261 fe80::95f6:2da7:dcdb:1fc1/128
                                        On-link
      1    306 ff00::/8                 On-link
     10    261 ff00::/8                 On-link
    ===========================================================================
    Persistent Routes:
     If Metric Network Destination      Gateway
      0 4294967295 ::/0                     2001:630:34:1010::1
    ===========================================================================

    Thursday, February 23, 2012 5:30 PM
  •  

    Hi DJL,

    Thanks for update and the information sharing.

    I noticed that you mentioned that were set to use IGMP multicast method when were implement IPv4 NLB system . Is this still the method we are using now ?

    I think maybe we can get better response by posting to IPv6 forum at this moment :

    http://social.technet.microsoft.com/Forums/en-us/ipv6/threads

    Regards,

    Tiger Li

    TechNet Subscriber Support in forum

    If you have any feedback on our support, please contact  tnmff@microsoft.com.


    Tiger Li

    TechNet Community Support

    Friday, February 24, 2012 6:20 AM
  • Hi Tiger Li,

    Yes - the cluster is still in IGMP multicast mode.  Shall i repost the question or can you move the thread to the IPv6 forums?

    Many thanks for all your assistance.

    Regards,

    Daniel

    Friday, February 24, 2012 9:27 AM
  • Hi all,

    We're still struggling with this.  Is anyone here using NLB with IPv6 successfully?

    Thanks,

    Daniel

    Monday, April 14, 2014 8:10 PM