[c-nsp] LWAPP Problems

[Fred Reimer]

Your configuration is wrong then.  The DHCP option should point to the
management interface.  The AP should do a LWAPP Discover and the management
interface should return a list of IP addresses that the AP can connect to
(ap-manager address(es)), along with the relative load on each interface
(max AP's and total AP's).  See section 5.2.4 and 5.2.5 of the draft:

5.2.4.  WTP Manager Control IPv4 Address

   The WTP Manager Control IPv4 Address message element is sent by the
   AC to the WTP during the discovery process and is used by the AC to
   provide the interfaces available on the AC, and their current load.
   This message element is useful for the WTP to perform load balancing
   across multiple interfaces.

      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                           IP Address                          |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |           WTP Count           |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type:   99 for WTP Manager Control IPv4 Address

   Length:   6

5.2.5.  WTP Manager Control IPv6 Address

   The WTP Manager Control IPv6 Address message element is sent by the
   AC to the WTP during the discovery process and is used by the AC to
   provide the interfaces available on the AC, and their current load.
   This message element is useful for the WTP to perform load balancing
   across multiple interfaces.

      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                           IP Address                          |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                           IP Address                          |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                           IP Address                          |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                           IP Address                          |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |           WTP Count           |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type:   137 for WTP Manager Control IPv6 Address

   Length:   6

   IP Address:   The IP Address of an interface.

   WTP Count:   The number of WTPs currently connected to the interface.


Fred Reimer, CISSP, CCNP, CQS-VPN, CQS-ISS
Senior Network Engineer
Coleman Technologies, Inc.
954-298-1697

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of jason.plank at comcast.net
> Sent: Thursday, May 22, 2008 9:28 AM
> To: Rupert Finnigan; cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] LWAPP Problems
> 
> I have always used the ap-manager interface in my DHCP option 43
> configuration. My understanding is that the Management interface is
> used for controller to controller traffic to terminate EOIP tunnels. I
> would call your configuration correct now :)
> 
> --
> Regards,
> 
> Jason Plank
> CCIE #16560
> e: jason.plank at comcast.net
> 
>  -------------- Original message ----------------------
> From: "Rupert Finnigan" <rupert.finnigan at googlemail.com>
> > Hi,
> >
> > Thanks to all who offered advise - It was the IP address in the end.
> I'd
> > setup DHCP Option 43 to the ap-manager interface address, and not the
> > management one. Now that's corrected all is fine. I'm still confused
> as to
> > how this particular network has worked in the past though!
> >
> > Thanks again,
> >
> > Rupert
> > _______________________________________________
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> 
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