Re: Request for comments: draft-jain-nvo3-overlay-oam-01.txt

[Pradeep Jain <[e-mail]>]

On Thursday, February 27, 2014, Pradeep Jain <[e-mail]>
wrote:

> Hi Shahram,
>
> Using BFD mandates that the probes need to be sent continuously. We don't
> want to impose this restriction and leave it to the user to decide if they
> want an on-demand probe or a continuous probe, which is what has been
> defined in the draft..
>
> Regarding the second point about including VNI/VSID in TLV, for the
> hardware/forwarding plane which is not capable of giving the overlay
> context of the packet (based on VNI/VSID) to the control plane, we need to
> rely on the VNI/VSID in the TLV to derive the overlay context in the
> control plane...
>
> Regards
> Pradeep
>
>
> On Thu, Feb 27, 2014 at 11:19 AM, Shahram Davari <[e-mail]<javascript:_e(%7B%7D,'cvml','[e-mail]');>
> > wrote:
>
>  Anil,
>
>
>
> I don't agree. If you use for example BFD for inner IP, and if BFD says
> connectivity is OK, this implies that the Overlay connectivity is also OK,
> since BFD is inside the overlay.
>
> Also I am not sure why you are adding the VNI, VSID, etc in the message as
> TLV, since these value are already in the packet header.
>
>
>
> Thx
> Shahram
>
>
>
> *From:* L2vpn [mailto:[e-mail]] *On Behalf Of *Anil Lohiya
> *Sent:* Thursday, February 27, 2014 10:19 AM
> *To:* Thomas Nadeau; Henderickx, Wim (Wim)
>
> *Cc:* [e-mail]; Pradeep Jain; Vinay Bannai; Ravi Shekhar
> *Subject:* Re: Request for comments: draft-jain-nvo3-overlay-oam-01.txt
>
>
>
>
>
> Existing ping/traceroute mechanisms don't work in the virtualized
> environment e.g. ping may report that IP reachability between the ingress
> and egress tunnel endpoints is fine but the end systems (i.e. VM, physical
> server etc.) connectivity for a tenant could still be broken. This is
> because ping only verifies basic connectivity between two endpoints in the
> underlay but NOT in the context of overlay segments. Hence, we need
> debugging tools that work in the overlay environment. Think why there was a
> need to have lsp ping ... requirement with IP overlays is not much different.
>
>
>
> Question is not whether applications are resilient or not... One can not
> ignore the fact that operators have to think about having the right tools
> when that "inevitable" call  comes from their customer about deteriorating
> application performance or traffic blackhole and there are no tools today
> specific to overlay network debugging.
>
>
>
> - Anil
>
>
>
> *From: *Thomas Nadeau <[e-mail]>
> *Date: *Thursday, February 27, 2014 8:05 AM
> *To: *"Henderickx, Wim (Wim)" <
>
>
>