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mstp 101

Hi,

Can anyone describe a bit about mstp or show me some good article to read.
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tankergoblin
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tankergoblin
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Don JohnstonCommented:
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tankergoblinAuthor Commented:
as far as i know MSTP is use to redundant physical topology with multiple VLAN.
My question now is MSTP stay in layer 2 only?
Can i use MSTP in VPN?
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Don JohnstonCommented:
All spanning tree protocols are layer-2.  As for VPN's, those are typically implemented at layer-3.  Which means STP is not a factor.  However, there are some VPN's that are setup as Layer-2. In those cases, it's possible that STP could transit the tunnel. It would depend on the VPN though.
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tankergoblinAuthor Commented:
If VPN are set up as layer 2 , can i understand as two different geographical area can communicate with each other?
since there are in layer 2 is that mean 2 different vlan cannot comunicate with each other via VPN?
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Don JohnstonCommented:
If VPN are set up as layer 2 , can i understand as two different geographical area can communicate with each other?
That doesn't have anything to do with spanning-tree.
Whether a VLAN can transit a layer-2 VPN will depend on what type of VPN.
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tankergoblinAuthor Commented:
as my knowledge tell me we mpls vpn, ipsec vpn, ssl vpn and so on.. do we have mstp vpn?
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Don JohnstonCommented:
No. Those are typically setup as Layer-3 VPNs.
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tankergoblinAuthor Commented:
then mstp purpose is for?
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Don JohnstonCommented:
MSTP is a version of Spanning Tree Protocol that supports a defined number of multiple instances.
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