From: Darby Weaver (darbyweaver@yahoo.com)
Date: Sat Mar 03 2007 - 15:12:06 ART
Excellent line of reasoning.
After being made aware of it and noting what it
actually does, I do find it odd that it is not
supported, especially since other vendors are using
this command as my google search indicated.
I guess, I'll just keep it in the back of my head for
a rainy day.
Since I do work on some networks that are
multi-vendor, this actually does have a real-world
value.
So much that a recent issue that we encountered at
work with Foundry may even need to be looked at again,
since we do have Cisco in the same picture.
Wonder if this might have caused an discrepancy that
we may have somehow overlooked.
--- Jeff Kesemeyer <jkesemey@bellsouth.net> wrote:
> The commands are there in the 3560 and 3550, but
> Cisco states that
> they are unsupported even though they are there
> because they not
> fully tested.
>
> Would you want to use one of these commands in the
> lab?
> How about undocumented commands altogether?
>
> I suspect with the automated lab grading system they
> have, they must
> be looking for certain commands in the
> configuration, I would hate to
> fail due to making the config work - but not getting
> the points for it.
>
> Jeff Kesemeyer
> CCNP, CCDP, CNX, MCSE, CNE
> Bradshaw Labs Inc.
> Your CCIE Rack Rental Source
> www.bradshawlabs.com
>
>
>
>
> On Mar 3, 2007, at 11:22 AM, Darby Weaver wrote:
>
> > Jeff,
> >
> > The command "spanning-tree pathcost [long | short}
> > does exist on the 3560's.
> >
> > I labbed it.
> >
> > And while it may not be documented in the command
> > reference guide - it is there and it does change
> the
> > value - I can produce the output easily enough.
> >
> > Apparently this featue is quite common among a lot
> of
> > vendor's switches as a quick search through google
> > would suggest.
> >
> > I have to read you link, and I know I was till 4am
> or
> > so labbing it up, but it definately changed the
> > values.
> >
> > I was working on remote lab or I would have posted
> my
> > lab results.
> >
> > If needed, I can produce them along with the
> version
> > of code on the 3560 - I did not try it yet on my
> > 3550's.
> >
> >
> > --- Jeff Kesemeyer <jkesemey@bellsouth.net> wrote:
> >
> >> The spanning-tree path-cost command does not
> exist,
> >> the two commands
> >> for configuring cost for STP is:
> >>
> >> spanning-tree cost <cost>
> >> Change the cost for an access port to select the
> >> best route.
> >>
> >> spanning-tree vlan <vlan> cost <cost>
> >> Change the VLAN cost for a trunk port so you can
> >> select which vlan
> >> goes over which trunk when multiple trunks exist,
> or
> >> etherchannel is
> >> implemented.
> >>
> >> Here's Cisco link for STP Technologies.
> >> http://www.cisco.com/en/US/tech/tk389/tk621/
> >> tsd_technology_support_protocol_home.html
> >>
> >> Jeff Kesemeyer
> >> CCNP, CCDP, CNX, MCSE, CNE
> >> Bradshaw Labs Inc.
> >> Your CCIE Rack Rental Source
> >> www.bradshawlabs.com
> >>
> >>
> >>
> >>
> >> On Mar 3, 2007, at 12:57 AM, nhatphuc wrote:
> >>
> >>> Darby,
> >>>
> >>> Thanks for replying, but I didn't mention
> >> spanning-tree cost, the
> >>> exact
> >>> command I asked is: spanning-tree pathcost
> method
> >>>
> >>> Thanks
> >>>
> >>> On 3/3/07, Darby Weaver <darbyweaver@yahoo.com>
> >> wrote:
> >>>>
> >>>> Here you go - syntax can be important.
> >>>> ======================================
> >>>>
> >>>> spanning-tree cost
> >>>> Use the spanning-tree cost interface
> >> configuration
> >>>> command to set the path cost for spanning-tree
> >>>> calculations. If a loop occurs, spanning tree
> >>>> considers the path cost when selecting an
> >> interface to
> >>>> place in the forwarding state. Use the no form
> of
> >> this
> >>>> command to return to the default setting.
> >>>>
> >>>> spanning-tree [vlan vlan-id] cost cost
> >>>>
> >>>> no spanning-tree [vlan vlan-id] cost
> >>>>
> >>>> Syntax Description
> >>>> vlan vlan-id
> >>>> (Optional) VLAN range associated with a
> >> spanning-tree
> >>>> instance. You can specify a single VLAN
> >> identified by
> >>>> VLAN ID number, a range of VLANs separated by a
> >>>> hyphen, or a series of VLANs separated by a
> >> comma. The
> >>>> range is 1 to 4094.
> >>>>
> >>>> cost
> >>>> Path cost. The range is 1 to 200000000, with
> >> higher
> >>>> values meaning higher costs.
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> Defaults
> >>>> The default path cost is computed from the
> >> interface
> >>>> bandwidth setting. These are the IEEE default
> >> path
> >>>> cost values:
> >>>>
> >>>> 1000 Mbps4
> >>>>
> >>>> 100 Mbps19
> >>>>
> >>>> 10 Mbps100
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3560/12235se/
> >>> cr/cli3.h
> >>> tm#wp1945601
> >>>>
> >>>>
> >>>>
> >>>> --- nhatphuc <nhatphuc@gmail.com> wrote:
> >>>>
> >>>>> Hi Group,
> >>>>>
> >>>>> Can you give me the link to "spanning-tree
> >> pathcost
> >>>>> method" command of 3550
> >>>>> or 3560? I've surfed the CiscoDoc but hasn't
> >> found.
> >>>>>
> >>>>> Thanks
> >>>>>
> >>>>> Phuc
> >>>>>
> >>>>>
> >>>>
> >>
> >
>
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