Nortel SMLT -- Cisco equivalent

Discussion in 'Cisco' started by tony, Nov 25, 2003.

  1. tony

    tony Guest

    Yesterday I had the opportunity to visit a nortel lab here in
    Michigan. They were showing us their 8600 switch and all the
    wonderful things that it can do. One of the most interesting features
    is SMLT -- Split Multi Link Trunking.

    You can have two fibre lines running from a switch stack to the core.
    One plugs into the first 8600 and the other in the second 8600. Both
    lines are apparently running in a load balanced configuration. The
    techs pulled the plug on one piece of fibre and the lag was one ping.
    Plugged that back in and again only a one ping lag. He did the second
    line and the same result.

    My question is this. Does cisco have anything that resembles this
    technology. Nortel tells me that this is not based on Spanning Tree
    at all but some other technology that they have perfected. This of
    course all happens at Layer 2.

    thanks
    tony, Nov 25, 2003
    #1
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  2. tony

    Dave Keith Guest

    We had that capability with Develcon WAN routers in the early 90's. Of
    course it was a remnant of the DevelNet technology from the 80's ... not
    that this helps a Cisco shop :)

    "tony" <> wrote in message
    news:...
    > Yesterday I had the opportunity to visit a nortel lab here in
    > Michigan. They were showing us their 8600 switch and all the
    > wonderful things that it can do. One of the most interesting features
    > is SMLT -- Split Multi Link Trunking.
    >
    > You can have two fibre lines running from a switch stack to the core.
    > One plugs into the first 8600 and the other in the second 8600. Both
    > lines are apparently running in a load balanced configuration. The
    > techs pulled the plug on one piece of fibre and the lag was one ping.
    > Plugged that back in and again only a one ping lag. He did the second
    > line and the same result.
    >
    > My question is this. Does cisco have anything that resembles this
    > technology. Nortel tells me that this is not based on Spanning Tree
    > at all but some other technology that they have perfected. This of
    > course all happens at Layer 2.
    >
    > thanks
    Dave Keith, Nov 25, 2003
    #2
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  3. tony

    dbis Guest

    > We had that capability with Develcon WAN routers in the early 90's. Of
    > course it was a remnant of the DevelNet technology from the 80's ... not
    > that this helps a Cisco shop :)


    not sure about cisco, but 3com 49xx or 40x0 w/ XRN does LACP across
    units. I have tested two 3com 4900 + XRN in distributed fabric and got
    subsecond switch over (120 ms delay in ping round trip vs. 10 ms in
    normal operation)
    dbis, Nov 25, 2003
    #3
  4. tony

    Geert Nijs Guest

    You have reached the same conclusion as i: no cisco does not have an
    equivalent for this.
    quite shocking he :)

    on the new 3750 switches they have some features that "resembles" it, but
    its not really the same......


    The basis of Nortel Split MLT is that the two backbone 8600 routers appear
    as ONE switch to the access
    switch (stack). And the two uplink are just a channel (cisco terminology).
    This is possible due to a special dedicated link between the 8600 (need
    1Gbit), called SMLT......

    Geert


    "tony" <> schreef in bericht
    news:...
    > Yesterday I had the opportunity to visit a nortel lab here in
    > Michigan. They were showing us their 8600 switch and all the
    > wonderful things that it can do. One of the most interesting features
    > is SMLT -- Split Multi Link Trunking.
    >
    > You can have two fibre lines running from a switch stack to the core.
    > One plugs into the first 8600 and the other in the second 8600. Both
    > lines are apparently running in a load balanced configuration. The
    > techs pulled the plug on one piece of fibre and the lag was one ping.
    > Plugged that back in and again only a one ping lag. He did the second
    > line and the same result.
    >
    > My question is this. Does cisco have anything that resembles this
    > technology. Nortel tells me that this is not based on Spanning Tree
    > at all but some other technology that they have perfected. This of
    > course all happens at Layer 2.
    >
    > thanks
    Geert Nijs, Nov 25, 2003
    #4
  5. tony

    charan_jeetsingh

    Joined:
    Aug 14, 2006
    Messages:
    1
    charan_jeetsingh, Aug 14, 2006
    #5
  6. tony

    rasoolg

    Joined:
    Nov 24, 2010
    Messages:
    1
    Cisco has got Virtual Switching which kills SMLT!

    Refer to my document in here :

    www . net-grp . com

    and search for VSS
    rasoolg, Nov 24, 2010
    #6
  7. tony

    MC13

    Joined:
    Mar 17, 2011
    Messages:
    1
    Nortel/Avaya switch clustering (SMLT) kills Cisco VSS
    Nortel has on all layer 3 switches
    Cisco only on 6500 and 720 sup for legacy hardware.
    Nortel provided on all existing layer 3 switches in later code.
    Also Nortel/Avaya clustering way easier to setup than cisco.
    MC13, Mar 17, 2011
    #7
  8. tony

    Zmegolaz

    Joined:
    Dec 7, 2011
    Messages:
    1
    Zmegolaz, Dec 7, 2011
    #8
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