GigE over SONET

[smif101]

We have a situation where some equipment did not come in and we are trying to bring up a circuit that was going to be GigE over SONET end to end but isn't possible at this time. What we are going to try is to have a 7200 router with a GigE interface and a OC3 POS interface. On the other ende is a SONET Optical switch (Lucent LambdaUnite) with a OC3 and a GigE interface. The Lucent is bridging the ethernet traffic into a VT for of the OC3. This is standard operations there. On the router I was going to set up a bridge group between the GigE and the POS interface, hoping this will accomplish the same thing. Now will the framing of these devices make this totally incompatiable or is there a chance to make the C2 bytes match up or anything. I am guessing the the ethernet traffic will be messed up going into a POS interface when it tries to come out the other end. Thanks for the help.

Jason Smith

www.smif101.com

[okreiter]

Hello.

I'm affraid it will not gonna work unless you insert another LambdaUnite to decapsulate the GE from teh SONET stream.

I'm not sure how the LambdaUnite is encapsulating the GE but most probably using GFP/LCAS/VCAT or a proprietary method.

In turn I know that the 7200 doesn't know any of the above mentioned protocol.

Hope this help.

[trandstr]

Jason:

I don't see any way for this circuit to work due to the differences in mapping. Possible option is putting GE directly on fiber (LX or ZX GBIC)between two 7200s.

Tom