Thanks Jason.. Interesting find Brendon. The thing is, currently I cannot get CDP to be seen over the Dot11Radio interface even though in a debug I can see the packets been sent.
BR_1# *Mar 1 21:08:02.526: CDP-PA: version 2 packet sent out on Dot11Radio1 *Mar 1 21:08:13.526: CDP-PA: version 2 packet sent out on Virtual-Dot11Radio0 *Mar 1 21:08:31.526: CDP-PA: version 2 packet sent out on FastEthernet0 *Mar 1 21:08:37.551: CDP-PA: Packet received from 6504 on interface FastEthernet0 BR_2# *Mar 2 02:21:33.947: CDP-PA: Packet received from CAT4 on interface FastEthernet0.10 On 21 September 2011 12:23, Brendon Hwang <[email protected]> wrote: > Just add one thing.. may be useful.. > > Looked at the user guide to refresh.. > > http://www.cisco.com/en/US/docs/wireless/access_point/12.4_3g_JA/configuration/guide/s43cdp.html > "CDP is sent on the lowest VLAN number configured on the access point. > When more than on*e* VLAN is used in a wireless network, Cisco recommends > that the lowest VLAN number configured be used as the native VLAN" > > Cheers, > Brendon > > On 21/09/2011, at 12:20 AM, Jason Boyers wrote: > > CDP will operate, even if VLAN 1 is not allowed on a trunk interface. It > is sent as an untagged frame from one device to another, even if the native > VLAN (whatever it is) is not allowed on the trunk. Try this for a test:** > ** > ** ** > 1. Cable a connection between 2 switches**** > 2. Configure another VLAN (say 10) on those switches**** > 3. Configure the switchport on each of those switches used to > connect to each other as a trunk port, with the VLAN from #2 as native**** > 4. Only allow another VLAN which has not been configured on the > switch (say VLAN 999) to pass between the switches**** > ** ** > The switches will still see one another as CDP neighbors. You can verify > the CDP packets are passing with the *debug cdp packets* command. It > won’t matter what VLAN is set as native or allowed.**** > ** ** > Jason Boyers - CCIE #26024 (Wireless)**** > Technical Instructor - IPexpert, Inc. > Mailto: *[email protected]* > ** ** > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Leigh Jewell > *Sent:* Tuesday, September 20, 2011 1:19 AM > *To:* [email protected] > *Subject:* [OSL | CCIE_Wireless] Vlan 1 on trunks for CDP**** > ** ** > Is anyone leaving vlan 1 on WLC trunks for CDP to operate ? > > Cheers, > Leigh**** > _______________________________________________ > 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
