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RE: BFD stability follow-up from IETF-91

"Fan, Peng" <fanpeng@chinamobile.com> Fri, 28 November 2014 10:51 UTC

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From: "Fan, Peng" <fanpeng@chinamobile.com>
To: rtg-bfd@ietf.org
References: <20141126001931.GJ20330@pfrc> <CAG1kdoghcA=xSaXmkr68qduH2t8oC=-ZazoQztj8JK12SazKsw@mail.gmail.com> <20141126005023981392.0c488535@sniff.de> <F73A3CB31E8BE34FA1BBE3C8F0CB2AE28B2D9A97@SZXEMA510-MBX.china.huawei.com> <20141126094242449051.c8abfe39@sniff.de> <F73A3CB31E8BE34FA1BBE3C8F0CB2AE28B2DB0BD@SZXEMA510-MBX.china.huawei.com> <315041E4211CB84E86EF7C25A2AB583D3476B1C0@xmb-rcd-x15.cisco.com>
In-Reply-To: <315041E4211CB84E86EF7C25A2AB583D3476B1C0@xmb-rcd-x15.cisco.com>
Subject: RE: BFD stability follow-up from IETF-91
Date: Fri, 28 Nov 2014 18:50:43 +0800
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Hi Jeff, all,

I have been following this stability extension from the beginning, and as an
operator I would like to express that this draft enables the "advanced
feature" we desire for BFD to provide additional useful information that
helps operators understand network issues. A relevant use case is detecting
lossy or "quasi-disconnected" links or member LAG links. An example of such
situation we experienced was a loosely connected fiber link resulting in
continuous, small amount of packet loss. BFD could get the information of
lost BFD frames on such unstable link, and probably report when a target
level is reached, say a certain number of frames are lost over a period or
among a total number of frames.

Best regards,
Peng

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