Network Ring

ty chan chanty_kh at
Fri Sep 11 07:29:23 UTC 2009

Does anyone have best practise for implementing those technologies ?

I am currently doing a testing LAB with CISCO REP since i have a few Metro on hand.
It works quite well in my LAB. There is one Request Time Out if the link break BUT it is physical layer not REP :)

From: Rubens Kuhl <rubensk at>
To: ty chan <chanty_kh at>
Cc: nanog at
Sent: Monday, September 7, 2009 8:15:23 PM
Subject: Re: Network Ring

My vote goes to proprietary ring protection from the vendor you choose:
- EAPS (Extreme)
- REP (Cisco)
- MRP (Foundry/Brocade)
- EPSR (Allied Telesis)

Although EAPS is implemented in all Extreme switches, select models
from the other vendors implement ring protection, but these models
also do other things you might want your network to have (QinQ,
per-VLAN controls).


On Mon, Sep 7, 2009 at 1:14 AM, ty chan<chanty_kh at> 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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