RE: Ethernet over SDH tutorial/concepts.
Hello: It could also just be a direct Ethernet path over a SONET circuit without the inherent 802.17 resiliency. You should ask them for more information about their infrastructure. Are they using 802.17? Is it path-protected on the SONET side? Mike -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Paul Khavkine Sent: Wednesday, November 30, 2005 12:05 PM To: MARLON BORBA Cc: nanog@merit.edu Subject: Re: Ethernet over SDH tutorial/concepts. This is most likely something like RPR/802.17 which is Ethernet over Sonet/SDH. Cheers Paul On Wed, 30 Nov 2005, MARLON BORBA wrote:
Dear NANOGers,
We are in process of choosing a new corporate ISP for our company. One of them offered us connection to their backbone using Ethernet over SDH. I'd like to find some introductory texts or prospects about that technology and some advice about its pros/cons when compared to traditional data circuits.
Abraços, Marlon Borba, CISSP. -- GTER 20/GTS 02.05 - Participe! http://eng.registro.br/gter20/prog.html --
************************************************ Paul Khavkine Networks/Systems Planning and Engineering DISTRIBUTEL Communications. 740 Notre Dame West, Suite 1135 Montreal, Quebec, Canada, H3C 3X6 +1-514-877-5505 x 263 http://www.distributel.net ************************************************
Sorry for the delay in posting, but I thought I would add couple of comments here. Ethernet transport over SONET/SDH can be done in several ways. - Frame mapped GFP encapsulation (ITU-T G.7041). Here is a white paper that is pretty detailed (http://www.pmc-sierra.com/cgi-bin/document.pl?docnum=2020296) - You can also do it using X.86 (LAPS) (http://www.ieee802.org/3/ad_hoc/etholaps/public/docs/opening_report_030 1.pdf) As far RPR goes, RPR is a MAC (802.17) and it is pretty much agnostic of the PHY layer. RPR can run on dark fiber or on a SONET/SDH path layer. RPR is not an encapsulation mechanism for Ethernet packets over SONET. It is at the MAC layer and provides additional functionality like running the nodes in a ring, oversubscription, fairness, QoS and resiliency against node and fiber failures. Here is a tutorial about RPR. (http://www.simula.no/departments/networks/.artifacts/commagMarch04) Regards, Vinay Bannai -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Michael K. Smith Sent: Wednesday, November 30, 2005 3:29 PM To: Paul Khavkine; MARLON BORBA Cc: nanog@merit.edu Subject: RE: Ethernet over SDH tutorial/concepts. Hello: It could also just be a direct Ethernet path over a SONET circuit without the inherent 802.17 resiliency. You should ask them for more information about their infrastructure. Are they using 802.17? Is it path-protected on the SONET side? Mike -----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of Paul Khavkine Sent: Wednesday, November 30, 2005 12:05 PM To: MARLON BORBA Cc: nanog@merit.edu Subject: Re: Ethernet over SDH tutorial/concepts. This is most likely something like RPR/802.17 which is Ethernet over Sonet/SDH. Cheers Paul On Wed, 30 Nov 2005, MARLON BORBA wrote:
Dear NANOGers,
We are in process of choosing a new corporate ISP for our company. One
of them offered us connection to their backbone using Ethernet over SDH. I'd like to find some introductory texts or prospects about that technology and some advice about its pros/cons when compared to traditional data circuits.
Abraços, Marlon Borba, CISSP. -- GTER 20/GTS 02.05 - Participe! http://eng.registro.br/gter20/prog.html --
************************************************ Paul Khavkine Networks/Systems Planning and Engineering DISTRIBUTEL Communications. 740 Notre Dame West, Suite 1135 Montreal, Quebec, Canada, H3C 3X6 +1-514-877-5505 x 263 http://www.distributel.net ************************************************
participants (2)
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Michael K. Smith -
Vinay Bannai