Re: MSTP BPDU

Hi,

You may want to look at the following blog post for introduction to MSTP:

http://blog.ine.com/2010/02/22/understanding-mstp/

See quick asnwers inline:

> 1. How is BPDU sent in MSTP ? is that sent by every single instance or every
> single VLAN ?

STP information for every instance is encoded in one MSTP BPDU, sent
out on all participating ports.

> 2. If it is sent by each instance, then which VLAN in this particular instance
> should send this BPDU ?

VLANs topologies and STP topologies are independent in MSTP. MSTP
BPDUs are carried using 802.2 LLC encapsulation (just like the
original STP), independent of any VLAN number.

-- 
Petr Lapukhov, petr_at_INE.com
CCIE #16379 (R&S/Security/SP/Voice)
Internetwork Expert, Inc.
http://www.INE.com
>
>
> thanks
>
> DJ
>
>
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