portfast

Discussion in 'Cisco' started by tony, Sep 7, 2006.

  1. tony

    tony Guest

    Is it a good idea to enable portfast on ports connected to servers and
    workstations?
     
    tony, Sep 7, 2006
    #1
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  2. In article <edq1eo$1md$>, tony <> wrote:
    >Is it a good idea to enable portfast on ports connected to servers and
    >workstations?


    Only if you have a very strict change control procedure. If you have
    more than one person who is allowed to reconfigure the cabling without
    checking it carefully with the other people, then eventually you *will*
    get unexpected devices connected.

    Also, these days servers are increasingly acting as routers, and
    increasingly supporting VLANs, so unexpected spanning trees
    are likely to be generated.
     
    Walter Roberson, Sep 7, 2006
    #2
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  3. tony

    jw Guest

    If you are the only plugging things in sure.
    If not someone may plug in another switch at some point and cause some
    grief.
    Spanning tree storms aren't funny!

    "Walter Roberson" <> wrote in message
    news:q20Mg.528838$IK3.420030@pd7tw1no...
    > In article <edq1eo$1md$>, tony <> wrote:
    >>Is it a good idea to enable portfast on ports connected to servers and
    >>workstations?

    >
    > Only if you have a very strict change control procedure. If you have
    > more than one person who is allowed to reconfigure the cabling without
    > checking it carefully with the other people, then eventually you *will*
    > get unexpected devices connected.
    >
    > Also, these days servers are increasingly acting as routers, and
    > increasingly supporting VLANs, so unexpected spanning trees
    > are likely to be generated.
     
    jw, Sep 8, 2006
    #3
  4. tony

    CCIE 15766 Guest

    tony wrote:
    > Is it a good idea to enable portfast on ports connected to servers and
    > workstations?


    Enabling PortFast is always good if the port connected to a server or
    workstation only.
    Even the server may act as a router, it is OK to enable PortFast,
    because a router doesn't participate in STP.

    To prevent human errors, you should always label the cable that has
    enabled PortFast, and enable BPDU Guard on the switch.
     
    CCIE 15766, Sep 8, 2006
    #4
  5. tony

    James Guest

    Enabling PortFast on access ports also prevents the Switch issuing STP
    Topology Change Notifications. Excessive TCN's can have an impact on
    network performance - a TCN is sent every time a port goes up or down
    unless PortFast is used.

    Basically always enable PortFast on user ports.

    James


    CCIE 15766 wrote:
    > tony wrote:
    > > Is it a good idea to enable portfast on ports connected to servers and
    > > workstations?

    >
    > Enabling PortFast is always good if the port connected to a server or
    > workstation only.
    > Even the server may act as a router, it is OK to enable PortFast,
    > because a router doesn't participate in STP.
    >
    > To prevent human errors, you should always label the cable that has
    > enabled PortFast, and enable BPDU Guard on the switch.
     
    James, Sep 8, 2006
    #5
  6. tony

    BernieM Guest

    "tony" <> wrote in message
    news:edq1eo$1md$...
    > Is it a good idea to enable portfast on ports connected to servers and
    > workstations?
    >

    Yes and as a safeguard enable 'spanning-tree bpduguard'. When a bpdu is
    received on a bpduguard enabled port it will be shutdown ... err-disabled.

    BernieM
     
    BernieM, Sep 8, 2006
    #6
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