[c-nsp] ONS 15454 and GigE

[Matthew Crocker]

Some things to watch out for...

The ONS has two different speed cross connect cards (XT card). The  
XT10G is a 10gig card with OC-192 core, OC-48 tributary and the XT,XT- 
VT card is OC-48 core, OC-12 tributary.  If your ONS has the 2.5g XT  
card you will be limited to 622mbps 'GigE'.

The ONS has a couple different GigE transport cards,  The E-Series is  
crap, OC-12 backplane so even with a 10G xconnect card you are  
limited to 622mbps. The MC-series is nice, can handle QinQ trunking,  
it is basically a 3550 on an ONS blade. It is also insanely expensive.

An OC-48 (2.5gbps) is a waste for just a GigE, you can run 2 GigEs on  
that if you handle it correctly.

Take a look at whiterock (www.whiterock.com) the VLX2006 is a nice  
OC-48 SONET mux that can handle Ethernet mapping and regular DS-3 &  
DS-1 trunks.

If you decide to run your own SONET muxes at both ends make sure your  
provider maps the DCC channels through their SONET on the OC-48 so  
both of your SONET muxes can see each other. The provider SONET ring  
will be transparent to your own SONET ring.

Some other SONET muxes with GigE transport capabilities

Lucent DMX
Fujitsu
FutureWei/Huawei

Or, you could go with an OC-48 POS card in your router and get the  
full 2.5gbps


On Nov 2, 2005, at 2:34 PM, John Neiberger wrote:

> An interesting situation has arisen where we might be able to get a  
> type
> of OC-48 for not much more than a point-to-point OC-3. Our provider
> already has an ONS 15454 on-site and they would want to hand off the
> OC-48 to us. We don't have the hardware to terminate an OC-48 but it
> does appear that the 15454 can hand off GigE to us. It looks to me  
> like
> a card is available that, in effect, "bridges" the OC side to the GigE
> side. Is that true?
>
> Regardless, is it overly complicated to take in an OC-48 on one side
> and hand that off via GigE on the customer side?
>
> It should be apparent that I know nearly nothing about the ONS 15454,
> so be gentle. :-)
>
> Thanks!
> John
> --
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--
Matthew S. Crocker
Vice President
Crocker Communications, Inc.
Internet Division
PO BOX 710
Greenfield, MA 01302-0710
http://www.crocker.com