Packet loss with IP HASH- HELP!!!

Posted on 2011-10-21
Last Modified: 2012-05-12
Dear All,


We have 5 ESXi Server jonined a HA cluster. We want to use IP Hash based laod balancing. We have HP BL 680G7 Blade servers with HP GBE2C switch. We have 6 NIC and 2 vLAN needs to be communicated through same. Our 2xGBE2C switch are connected to Nexus 2x2248 switch which then connected to Nexus 2x5010 connected to 2xCISCO 6506 Core switch. The VLAN are defined on Juniper firewall which is conencted to Cisco core switch. there are 6 NIC connected to vSwitch0 and VM Network port group the policy is set to IP HASH. In this scenario we are having packet loss even with ping. We changed the load balancing at switch level and still the packet loss is coming. If we try to switch OFFany GBE2C switch in our blade chassis, all seems to work without any issue, e.g. no packet loss but when we switch ON both switch the packet loss issue is coming.


One more thing, if we set the load balancing to "Based on VLAN ID" then all seems to work well. We want to use IP HASH only as there only we achive true load balancing. Also We have got the configuration checked with VMware L2 and so many other experts and they all say all the config is as per requirement. We are using ESXi v4.1. Can someone help to isolate as we are stuck in this for last 1 month without a solution.


Thanks a ton in advance..
Question by:mukvinman

    Author Comment

    i m posting the configuration related to our setup in core switch. Please let me know if any other config is required and i will provide same to close.


    BTH-SF-N5k-01# sh int ethernet 101/1/1 switchport

    Name: Ethernet101/1/1

      Switchport: Enabled

      Switchport Monitor: Not enabled

      Operational Mode: trunk

      Access Mode VLAN: 1 (default)

      Trunking Native Mode VLAN: 1 (default)

      Trunking VLANs Enabled: 1-3967,4048-4093

      Administrative private-vlan primary host-association: none

      Administrative private-vlan secondary host-association: none

      Administrative private-vlan primary mapping: none

      Administrative private-vlan secondary mapping: none

      Administrative private-vlan trunk native VLAN: none

      Administrative private-vlan trunk encapsulation: dot1q

      Administrative private-vlan trunk normal VLANs: none

      Administrative private-vlan trunk private VLANs:

      Operational private-vlan: none

      Unknown unicast blocked: disabled

      Unknown multicast blocked: disabled


    BTH-CR-6506-02#sh int tenGigabitEthernet 1/15 switchport

    Name: Te1/15

    Switchport: Enabled

    Administrative Mode: trunk

    Operational Mode: trunk (member of bundle Po4)

    Administrative Trunking Encapsulation: dot1q

    Operational Trunking Encapsulation: dot1q

    Negotiation of Trunking: On

    Access Mode VLAN: 1 (default)

    Trunking Native Mode VLAN: 1 (default)

    Administrative Native VLAN tagging: enabled

    Operational Native VLAN tagging: disabled

    Voice VLAN: none

    Administrative private-vlan host-association: none

    Administrative private-vlan mapping: none

    Operational private-vlan: none

    Trunking VLANs Enabled: ALL

    Pruning VLANs Enabled: 2-1001

    Capture Mode Disabled

    Capture VLANs Allowed: ALL


    Unknown unicast blocked: disabled

    Unknown multicast blocked: disabled


    We have tried so many options but nothing seems to work, so please help.


    Thanks again...
    LVL 22

    Expert Comment


    Accepted Solution

    issue fixed

    Author Closing Comment

    esxi doesnt support 2 eather tunnels in IP hash

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