[c-nsp] Cisco Nexus as MetroE switch?

[Adam Vitkovsky]

> Marian Durkovic
> Sent: Wednesday, November 04, 2015 8:24 AM
> On Tue, 3 Nov 2015 13:33:51 +0000, Adam Vitkovsky wrote
> > To me it's like building a Frame-Relay backbone, we've been there and
> > learned it's better to build L3 backbones over which we can build
> > virtual overlays and transport L2/L3/CEoP/SAToP/whatever else future
> > brings right?
>
> As explained above, TRILL *is* internally using L3 backbone to transport
> ethernet packets. This is way different than Flame-Delay offered.
>
>
Hmm maybe Huawei s doing something radically different.

But my understanding is that TRILL is using MAC in MAC encapsulation just like PBB.
And just like CLNS* routing routes between NSAP addresses, TRILL routes between Bridge IDs (with the exception that the TRILL Bridge IDs are flat addresses)
Or like in IP routing Integrated ISIS carries end system IP address reachability information in TRILL ISIS can carry information about end system MAC addresses if ESADI is enabled.
But there's no need for IP addresses in this model whatsoever.

*I used term CLNS routing because it encompasses IS-IS as well as PNNI(best routing protocol ever created IMO) used in ATM.
-So that's why it seems to me I witness the history repeating itself.



adam


        Adam Vitkovsky
        IP Engineer

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