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

[Clinton Work]

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.  The 
Cisco PVSTP+ BPDUs have an extra TLV (Type Length Vector) on the end 
which specifies the VLAN the BPDU is for.  The PVST+ Vlan TLV helps 
detect problems if the Vlans somehow get mixed together.   I have to 
wonder why you are running PVST+ thru Nortel switches why may or may not 
support it.  I know that later versions of software on the Nortel 
Passport 8600s can support PVST+


Jean-Christophe Varaillon wrote:
> Hi,
>
> 6509_A----Ethernet_SW_Nortel_A-...-Ethernet_SW_Nortel_B----6509_B
>
> >From the logs of 6509_A, I get the following message (I got 12 of them in 24
> hours):
> ------
> Feb  5 08:38:32 6509_A: %SPANTREE-SP-2-RECV_BAD_TLV:
> Received SSTP BPDU with bad TLV on GigabitEthernet1/31 VLAN21.
>
> Feb  5 08:38:32 6509_A: %SPANTREE-SP-2-RECV_BAD_TLV:
> Received SSTP BPDU with bad TLV on GigabitEthernet1/31 VLAN60.
> ------
>
> >From Cisco it means that:
> "The specified interface has received a Shared Spanning Tree Protocol BPDU
> that was missing the VLAN ID tag".
>
> So the 6509_A received an untagged BPDU on its 802.1q trunk port and this
> packet has been dropped.
>
>
>   


-- 

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Clinton Work
Airdrie, AB