Network Ring
VINAY BANNAI
bannai at pacbell.net
Mon Sep 7 06:32:02 UTC 2009
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 at pacbell.net
--- On Sun, 9/6/09, ty chan <chanty_kh at yahoo.com> wrote:
From: ty chan <chanty_kh at yahoo.com>
Subject: Re: Network Ring
To: "jamie" <j at arpa.com>
Cc: nanog at nanog.org
Date: Sunday, September 6, 2009, 9:52 PM
Only one vendor will be chosen.
________________________________
From: jamie <j at arpa.com>
To: ty chan <chanty_kh at yahoo.com>
Cc: nanog at 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 at 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
>
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