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-----Original Message-----
From: owner-stds-802-17@xxxxxxxxxxxxxxxxxx [mailto:owner-stds-802-17@xxxxxxxxxxxxxxxxxx]On Behalf Of Vish Nandlall
Sent: Tuesday, August 07, 2001 4:38 PM
To: 'B J Lee'; stds-802-17
Subject: RE: [RPRWG] RPR and WDM topology discoverysee belowVish Nandlall
Nortel NetworksESN 393-1350
External (613) 763-1350
vnandlal@xxxxxxxxxxxxxxxxxx
-----Original Message-----
From: B J Lee [mailto:bjlee@xxxxxxxxxxxxxxxxxx]
Sent: Tuesday, August 07, 2001 3:57 PM
To: Nandlall, Vish [CAR:KCQ0:EXCH]; stds-802-17
Subject: RE: [RPRWG] RPR and WDM topology discoveryI do not think we identifed such a requirement so far, if I understand your question correctly.Do you mean that a RPR node supports multiple rings on different wavelengths includingbypasses, acting as an interconnection attachment?
[Nandlall, Vish [CAR:SB06:EXCH]]I didn't necessarily mean multiple rings supported on one RPR node (although it could be), I was thinking multiple RPR rings running on the same physical plant. One RPR node would terminate and source a wavelength dedicated to its ring, and optically bypass all other wavelengths. In this scenario, it would be difficult to sectionalize a fault if the nearest physical adjacent node was on a different wavelength.It would be appreciated if you could clarify more on"will RPR only connect as a client to an existing DWDM network and rely on whateverexisting transport mechanism is in place?"
[Nandlall, Vish [CAR:SB06:EXCH]]I was referring to a configuration whereby the RPR node subtended an OADM box to access a wavelength in a DWDM ring (which in turn would provide connectivity to other RPR nodes hanging off upstream/downstream OADMs on the same wavelength). Multiple RPR rings could then be realized using the same physical ring structure. This would obviously require the development of a new client interface on the OADM to interface the RPR.BJ-----Original Message-----
From: owner-stds-802-17@xxxxxxxxxxxxxxxxxx [mailto:owner-stds-802-17@xxxxxxxxxxxxxxxxxx]On Behalf Of Vish Nandlall
Sent: Tuesday, August 07, 2001 1:06 PM
To: 'stds-802-17@xxxxxxxx'
Subject: [RPRWG] RPR and WDM topology discoveryIn the context of an DWDM RPR implementing optical bypass, would there be a requirement for a dedicated supervisory channel for topology discovery (i.e. if both neighbors of an RPR node add/drop a different wavelength then there is no in-band mechanism for detecting physical adjacencies) - or will RPR only connect as a client to an existing DWDM network and rely on whatever existing transport mechanism is in place ?
Regards,
Vish Nandlall
Nortel Networks
ESN 393-1350
External (613) 763-1350
vnandlal@xxxxxxxxxxxxxxxxxx