[c-nsp] VPLS and BPDU

[Daniel Verlouw]

On Wed, Jun 13, 2012 at 3:13 PM, Saku Ytti <saku at ytti.fi> wrote:
> On (2012-06-13 10:34 +0200), Daniel Verlouw wrote:
> The URL I linked, which clarifies BPDU handling, section 8.1.3 'L2CP
> Requirements for Ethernet Private LAN (EP-LAN) Service' says 'Must Peer on
> all UNIs or Discard on all UNIs'
>
> I'm having great troubles understanding 8.1.3 as permission to tunnel.

as explained in 8.1, it's a two step logic;

First step is based on destination mac only.
STP destination mac is 01-80-C2-00-00-00, so for EP-LAN, table B
applies, which reads "must tunnel".

Second step (table F in 8.1.3) only comes into play for destination
macs 01-80-C2-00-00-01 through -0A and 01-80-C2-00-00-0E, but STP does
not run on those macs at all normally so only step 1 applies.

and note this document only applies to L2CP with destination macs in
the 01-80-C2-00-00-00 to -0F range. E.g. for Cisco and others
proprietary stuff using other macs you can do whatever you please.

--
Daniel.