ExtremeSwitching (Other)

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Stp config for mlag design

  • 1.  Stp config for mlag design

    Posted 02-13-2018 13:30
    I have a network, where there are two MLAG peers at the core. Each peer is a stack made of one X670-G2 and one X460-G2. At the edge I have 12 stacks, each one made of 4 pcs.up to 6 pcs X440-G2. On every edge stack there is a lag using 2 x 10Gb, connected to MLAG peers:

    enable sharing 1:52 grouping 1:52,4:52 algorithm address-based L3_L4 lacp

    AFAIK, starting from 22.3 (or 22.x), there is stp enabled by default on all switch ports.
    So I disabled it on uplinks to MLAG:

    configure stpd s0 delete vlan Default ports 1:52

    There is no more stp config within the edge stack (except defaults, of course).
    Is it enough to have proper stp configuration accross the edge stack ?
    What I am really trying to achieve, is a loop-free configuration, but elrp is not allowed as it is extreme-owned protocol.

    Any suggestions ?

    REGARDS
    Robert



  • 2.  RE: Stp config for mlag design

    Posted 02-13-2018 13:49
    Hi Robert

    i think that could be better configure spantree edge-safeguard, to block accidental loop made by patch cord on the access port.

    Belowe the configuration tha I use over our network

    configure stpd s0 ports edge-safeguard enable 1:1-48 bpdu-restrict recovery-timeout 300

    Regards
    CLaudio



  • 3.  RE: Stp config for mlag design

    Posted 02-13-2018 13:56
    Thank you, Claudio - that will be useful too.
    Anyway, stp on MLAG uplink should be disabled, right ?


  • 4.  RE: Stp config for mlag design

    Posted 02-16-2018 09:25
    Hello Guys,

    Is the config line:

    configure stpd s0 delete vlan Default ports 1:52

    enough to disable completely stp on that port, or do I have to do it for all vlans (not just "Default" vlan) ?

    REGARDS