[c-nsp] SPANTREE-SP-2-RECV_BAD_TLV

[Jean-Christophe Varaillon]

Thanks for your so prompt answer.

> I may be wrong, but I believe SSTP is better known as per VLAN STP 
> (PVST+).   The 6509 is probably complaining that its receiving a regular 
> 802.1D BPU when its expecting a PVSTP+ BPDU on vlans 21 and 60.

Both 6509 are configured to use STP in PVST+ mode.

> I have to wonder why you are running PVST+ thru Nortel switches why may or
> may not support it.

The carrier provider gives us ethernet connections through its Nortel
switches. It seems that we cannot use that link in such a naïve way of
thinking: Setting a trunk between the two 6509 through the two Nortel
switches of the carrier provider...

> I know that later versions of software on the Nortel Passport 8600s can 
> support PVST+

I will have to check this, but indeed, from Cisco:
"PVST+ is an enhancement to the 802.1Q specification and is not supported on
non-Cisco devices."

So I suppose that the Nortel switch sends those untagged BPDU, which are not
in the PVST+ format.
 
Christophe