03-09-2009 12:29 AM - edited 03-06-2019 04:28 AM
Hi
we search for the best spanning-tree mode available
the whole network is made by 3750 stacks
and with the version we have we can choose between the next modes
(config)#spanning-tree mode ?
mst Multiple spanning tree mode
pvst Per-Vlan spanning tree mode
rapid-pvst Per-Vlan rapid spanning tree mode
is it correct that mst uses a proces per vlan and that rapid-pvst uses even a faster proces per vlan?
I don't really understand the difference between mst an pvst?
thank you
03-09-2009 12:36 AM
Hello Bart,
if your network is made all of Cisco switches and all of them support it I would go for rapid-pvst.
PVST uses one old 802.1D instance for each vlan.
Rapid PVST uses one rapid 802.1W instance for each Vlan.
MST 802.1s uses one or more rapid 802.1s instances, each instance can have a group or range of vlans associated with it.
So MST is the most scalable but configuration and planning is more heavy:
all switches need to be configured manually for:
mst mode
mst region name
mst revision number
vlans to instances mapping
if one of the above parameters don't match the two switches think to be in different MST regions.
So if you don't plan to use an high number of vlans I would go for Rapid-PVST
see for PVST and Rapid PVST
for MST
Hope to help
Giuseppe
03-09-2009 03:07 AM
Hi Giuslar,
this was the explanation i was looking for
Thank you for your quick and easy to understand reply
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