iSCSI + NIC teaming - Storage

This is a discussion on iSCSI + NIC teaming - Storage ; hello all is NIC teaming supported on iSCSI target and the iSCSI initiator? and if not, how is fault tolerance incorporated into an iSCSI solution? regards...

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Thread: iSCSI + NIC teaming

  1. iSCSI + NIC teaming

    hello all

    is NIC teaming supported on iSCSI target and the iSCSI initiator?

    and if not, how is fault tolerance incorporated into an iSCSI solution?

    regards



  2. Re: iSCSI + NIC teaming


    "NoBoDy" wrote in message
    news:ePAIUB3DIHA.5752@TK2MSFTNGP02.phx.gbl...
    > hello all
    >
    > is NIC teaming supported on iSCSI target and the iSCSI initiator?
    >
    > and if not, how is fault tolerance incorporated into an iSCSI solution?
    >
    > regards
    >


    MPIO

    Moojit

    www.moojit.net



  3. Re: iSCSI + NIC teaming

    You have a couple choices.

    You can either use MCS (Multiple Connections per Session) or MPIO. With
    MPIO, you have multiple Sessions while with MCS you have a single Session
    but multiple TCP connections.

    There is a large debate on which to use.

    MPIO handles fault tolerance at a higher level in the stack, the SCSI layer
    and works across FCP and iSCSI. While MCS is iSCSI specific. In order to
    take advantage of better Error Recovery Levels (i.e. ERL > 0) you will want
    to use MCS. If you are using HBAs rather than a standard NIC then you
    definetely want MPIO.

    MPIO is more popular since few storage targets support MCS. You can google
    either to learn more.

    ~kenny

    "NoBoDy" wrote in message
    news:ePAIUB3DIHA.5752@TK2MSFTNGP02.phx.gbl...
    > hello all
    >
    > is NIC teaming supported on iSCSI target and the iSCSI initiator?
    >
    > and if not, how is fault tolerance incorporated into an iSCSI solution?
    >
    > regards
    >



  4. Re: iSCSI + NIC teaming

    is this required on both the storage and server end?

    "Kenny Speer" wrote in message
    news:ui5%237LlEIHA.1208@TK2MSFTNGP03.phx.gbl...
    > You have a couple choices.
    >
    > You can either use MCS (Multiple Connections per Session) or MPIO. With
    > MPIO, you have multiple Sessions while with MCS you have a single Session
    > but multiple TCP connections.
    >
    > There is a large debate on which to use.
    >
    > MPIO handles fault tolerance at a higher level in the stack, the SCSI
    > layer and works across FCP and iSCSI. While MCS is iSCSI specific. In
    > order to take advantage of better Error Recovery Levels (i.e. ERL > 0) you
    > will want to use MCS. If you are using HBAs rather than a standard NIC
    > then you definetely want MPIO.
    >
    > MPIO is more popular since few storage targets support MCS. You can
    > google either to learn more.
    >
    > ~kenny
    >
    > "NoBoDy" wrote in message
    > news:ePAIUB3DIHA.5752@TK2MSFTNGP02.phx.gbl...
    >> hello all
    >>
    >> is NIC teaming supported on iSCSI target and the iSCSI initiator?
    >>
    >> and if not, how is fault tolerance incorporated into an iSCSI solution?
    >>
    >> regards
    >>

    >




  5. Re: iSCSI + NIC teaming

    MCS must be supported by both the server and the target. MPIO requires the
    Microsoft iSCSI DSM (mpio checkbox during installation) and the target must
    allow multiple Sessions to be established from the same IQN (Server). Not
    sure if any targets prevent this, but if yours does, send it back.

    ~kenny

    "NoBoDy" wrote in message
    news:u1fEQD2EIHA.484@TK2MSFTNGP06.phx.gbl...
    > is this required on both the storage and server end?
    >
    > "Kenny Speer" wrote in message
    > news:ui5%237LlEIHA.1208@TK2MSFTNGP03.phx.gbl...
    >> You have a couple choices.
    >>
    >> You can either use MCS (Multiple Connections per Session) or MPIO. With
    >> MPIO, you have multiple Sessions while with MCS you have a single Session
    >> but multiple TCP connections.
    >>
    >> There is a large debate on which to use.
    >>
    >> MPIO handles fault tolerance at a higher level in the stack, the SCSI
    >> layer and works across FCP and iSCSI. While MCS is iSCSI specific. In
    >> order to take advantage of better Error Recovery Levels (i.e. ERL > 0)
    >> you will want to use MCS. If you are using HBAs rather than a standard
    >> NIC then you definetely want MPIO.
    >>
    >> MPIO is more popular since few storage targets support MCS. You can
    >> google either to learn more.
    >>
    >> ~kenny
    >>
    >> "NoBoDy" wrote in message
    >> news:ePAIUB3DIHA.5752@TK2MSFTNGP02.phx.gbl...
    >>> hello all
    >>>
    >>> is NIC teaming supported on iSCSI target and the iSCSI initiator?
    >>>
    >>> and if not, how is fault tolerance incorporated into an iSCSI solution?
    >>>
    >>> regards
    >>>

    >>

    >
    >



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