By default, STP is disabled on the WLC. If more than one port is used on a 4400 in a non-LAG configuration, and an interface/VLAN is associted with more than one port, only one port is used at a time for that VLAN. So, STP doesn't come into play there. The 2100 doesn't support STP (nor does the 5500 for the upcoming version.) Thus, *spanning-tree portfast trunk* can be used without concern for STP in most cases. Also, keep in mind that *spanning-tree portfast trunk* doesn't disable STP. If a port receives a BPDU when using that command, it will revert to normal STP operation. That includes moving through the blocking, listening, learning, and forwarding states.
I was doing some testing on this a month ago, and I could not get the WLC to send BPDUs. Keep in mind that I didn't have a WGB connected, which could potentially send BPDUs. Nevertheless, the ports connected to the WLC showed that the switch was sending BPDUs to the WLC, but it wasn't receiving any from the WLC. I had even set the WLC to a lower bridge priority (not interface priority.) And, the *show spanning-tree switch* command shows the WLC as the root, even if it has a higher bridge priority. So, it may be my version (4.2.207.0,) but STP doesn't appear to be functioning anyways. I'd love to hear feedback from others on this one. Jason Boyers - CCIE #26024 (Wireless) Senior Technical Instructor - IPexpert, Inc. Mailto: *[email protected] * On Wed, Jul 27, 2011 at 6:09 AM, Stalder Dominic <[email protected] > wrote: > Hi group > > In section 1 of the DSG (lab workbook 1) we have to configure spanning-tree > portfast trunk for WLC Po1 on Cat1 and WLC Po2 on Cat2. As we assume that > the WLC1 will not create any loops. > > My question is, do I have to enable STP (802.1D or Fast) on WLC1 ports or > do I have to disable STP? What I do not understand is, where the > spanning-tree algorithm decides to block a port or is this not necessary at > all? > > Thanks and best regards > Dominic > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > >
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
