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RE: [EFM] OAM - Faye's seven points - pings


I think somebody already made the point that a service provider would not
want the 'customer/subscriber' being able to send pings into the service
providers infrastructure. If the service is end to end VPN then the
subscriber can be enabled to ping through the service providers 'cloud' to
the subscribers equipment at the far end.

There may be a case for including a ping test within the EFM CPE that is
only accessible to the service providers engineer for use at installation
time. However, I think the target is to make the CPE plug and play and do
all the set-up / initialisation / config. from a central NOC or at worst
from the POP. You don't necessarily need that much intelligence on the
service provider side of the demarc (in the CPE) to do this.

On the other OAM thread: the MEF is probably a 'better place' to discuss the
broader, higher layer issues of management between NOC NMS, proxies and CPEs
in the context of Ethernet Subscriber Access (ESA). The ietf is probably
where the 'standards' will be written up as rfcs. There is an MEF technical
group starting work on this I understand.

Best regards

Bob Barrett

> -----Original Message-----
> From: Faye Ly [mailto:faye@xxxxxxxxxx]
> Sent: 18 September 2001 19:06
> To: bob.barrett@xxxxxxxxxxxxxxx; Geoff Thompson; fkittred@xxxxxxx
> Cc:
> Subject: RE: [EFM] OAM - Faye's seven points
> Bob,
> Thank you for the response.  Please see my comments
> embedded in <FL> below:
> >> 4. Connectivity diagnose (ping etc) - This is divided into link
> >> connectivity which
> >> can be covered by 2 and subscriber line connectivity.
> >Mandatory for the link, up to a point as close to the subscriber
> interface
> >as possible e.g. copper loop back on the connector side of the IC, in
> the
> >last output stage of the IC (most PHY ICs support this already).
> >Tests to the subscriber equipment are outside of the scope of EFM, but
> in
> >real terms the service provider will probably PING something on the
> >subscriber network, given access rights.
> <FL> Very good point.  I always thought what they need is
> ping-ing from subscriber side to the upstream router to
> test the connectivity.  Not the other way around.
> So when subscriber calls and complains about a problem
> with his/her connectivity, I guess you need to:
> 1. First find out from your network map to see if you
> have gotten a report somewhere stating a box fault or
> line card fault.  Either one is in the way of this
> subscriber.  You also validate this by ping-ing the
> CPE from the head-end?
> 2. If 1 is not true, you ping the subscriber's PC or
> CPE port from the router?  Note that the requirements
> on the OAM is quite different from having to be able
> to ping from the CPE port to the router.  The later
> requires the CPE to accept such a 'ping' request
> from the NOC.
> Your thoughts?
> -faye