[c-nsp] question about service provider network design

[Mateusz Błaszczyk]

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2008/10/21 Dan Armstrong :
> So say I have an SVI on a PE switch which in turn has 2 layer2 links back to
> 2 core boxes, the core boxes protected again by a 3rd layer2 link.
>
> MST will protect me and make sure I always have link to the PE routers &
> core routers.  What's wrong with using that SVI address in your PE router as
> a reference, no need for an IGP down there?
>

In such a scenario you will always get a suboptimized traffic flow as
1 of the links will be blocked by stp.
On the other hand you can create 2 vlans - 1st for coreA 2nd for coreB
and load balance the traffic by way of 2 regions...
(remember that ptp vlans are not supported by mst)

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- -mat  pgp-key 0x1C655CAB


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