There are several ring technologies that are interesting but again it depends on what services you are planning to run and what kind of SLA guarantees you need: - RPR (802.17) : This has quieted down but it is a fairly robust technology giving you packet rings with 50ms, CoS, fairness and upto 255 nodes in a ring - EAPS: This technology is more vendor specific (eventhough an informational RFC exists) - ERPS (G.8032 - ITU) : This standard from ITU folks supports ethernet based packet rings and is comparable to EAPS - SONET/SDH : This is tried and tested but do you want to deploy a TDM based technology if most of your traffic is packet based - MPLS/VPLS : This is a layer 3 based and may not work for pure layer 2 service providers. It is tried and tested but does have some operational complexity built-in compared to layer 2 based technologies I agree with an earlier suggestion made, do not mix vendors if you want service level interoperability. Vinay Bannai Email : bannai@pacbell.net --- On Sun, 9/6/09, ty chan <chanty_kh@yahoo.com> wrote: From: ty chan <chanty_kh@yahoo.com> Subject: Re: Network Ring To: "jamie" <j@arpa.com> Cc: nanog@nanog.org Date: Sunday, September 6, 2009, 9:52 PM Only one vendor will be chosen. ________________________________ From: jamie <j@arpa.com> To: ty chan <chanty_kh@yahoo.com> Cc: nanog@nanog.org Sent: Monday, September 7, 2009 11:51:17 AM Subject: Re: Network Ring Step 1: Don't mix vendors. Period. On Sun, Sep 6, 2009 at 11:14 PM, ty chan <chanty_kh@yahoo.com> wrote: Dear all,
I am in process of planning ring network to cover 15 POPs in City. Some technologies are chosen for consideration like SDH(Huawei), PVRST+(Cisco), RSTP(Zyxel), EAPS (extreme network) and MPLS(VPLS). The purpose is to provide L2 Ethernet connectivities from POPs to central point (DC) and ring protection.
I know you all are in those network for years. can you give me some advises?
Best regards, chanty