[c-nsp] STP over GRE multipoint

[Bruce Pinsky]

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Mattias Eliasson wrote:
> Hi all
> 
> I was wondering if STP runs over GRE multipoint.
> 
> If it is possible to use as a simple fallback mechanism.
> 
> Senario:
> 
> 6503-E sup32
> 
> GRE1      GRE2
>     Loopback1
>    |              |
>    |              |
>    |              |
> ADSL     Eth
> WAN1    WAN2
> GRE1   GRE2
>     Loopback0
> 
> 1801-K9
>         |
>         |
>     Cust IF
> 
> 
> Or will I have to use an IGP?
> 

While it may be configurable on your platforms and versions, it is
unsupported and not guaranteed to work at all.

Better to use an IGP and make the whole thing L3. Or you could HSRP for
path selection over the ADSL/Eth and use L2TPv3 to xconnect the two
ethernet ports regardless of the interconnect path being used.

- --
=========
bep

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