MST 802.1s revision

MST 802.1s revision

Post by hktc » Thu, 13 May 2004 18:22:13


Just wondering when and how we use the revision option. For example,
if I start off with revision=1 with 10 VLANs and wanted to add 1 more
VLAN to the entire MST. How should I do it?

Should I start from the STP root or the leaf nodes? And should my code
look like? (esp. the revision field).

I searched CCO and found very little discussion how we maintain (e.g.
add/delete VLANs) MSTP. Any explanation/experience sharing is highly



1. interoperate between PVST+ or MST (802.1s) and CST (802.1d) region?


I am confused on interoperate between PVST+ and CST (802.1d) region or
MST (802.1s) and CST (802.1d) region. Suppose I have access switch A
with 2 VLANs redundantly connected to 2 distribution/core switches, B
and C, in PVST+ or MST region. And I configure spanning tree to half of
VLANs forward on each uplink, such as VLAN 100 through switch B and
VLAN 200 through switch C. So, when I connect this region to CST
region, which's spanning tree topology to operate within the CST

Please advice me.

Thanks for advance,

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