[ixpmanager] Disparity between MRTG and SFLOW graphs.

[Lolade Olori]

Dear Nick,
Thank you for the prompt reply. I will review the checklist as you
suggested.

On Thu, Jul 22, 2021 at 4:43 PM Nick Hilliard <nick at foobar.org> wrote:

> Lolade Olori wrote on 22/07/2021 13:51:
> > For Eg, a sensor which has 300Mbps and 4Gbps of input and output traffic
> > respectively on MRTG will be around 0Mbps and 100Mbps on Sflow.
>
> There are a several things that could cause this:
>
> - ports not configured as type: Peering
> - switch ports not configured to have ingress sflow enabled on each port
> - switches which are configured to rate-limit the sampling rate
> - mac address database not configured correctly or not properly matching
> reality
>
> Generally, sflow is one of the more difficult aspects of IXP Manager to
> get (and stay) working correctly because there are a lot of moving parts
> and interactions with non-ixp-manager components.
>
> As a check-list, you should ensure:
>
> - all the ports used by IXP participants are configured as type: Peering
>
> - manually check that the port configuration on your switches includes
> sflow.
>
> - make sure that the overall sample rate doesn't exceed the switch's
> default sflow sample export rate
>
> - make sure that all MAC addresses are correctly configured in the "MAC
> Addresses | Configured Addresses" list.
>
> - Check that each ixp participant port has a mac address associated with
> it in "update-l2database.pl --debug"
>
> Nick
>
>
>
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