[f-nsp] per vlan/ve mrtg-graphs / snmp-counters on the Netiron MLX

[David Ball]

  So, is that to say that if I'm using a Foundry switch as an L2
aggregator for example, and I have a trunk port through which many
customers pass, I can't gather per-vlan stats via SNMP from the
virtual interface for a given customer?  Just wanting to make sure I
understand the scope here.

David



On 20/01/2008, Richard A Steenbergen <ras at e-gerbil.net> wrote:
> On Sun, Jan 20, 2008 at 09:59:08PM +0100, Gunther Stammwitz wrote:
> > Hello colleagues,
> >
> >
> > I'm trying to graph vlans or virtual interfaces (VEs) using mrtg on th
> > Netiron MLX but am not succesful.
> >
> > Mrtg is detecting the virtual interfaces but the speed is missing. After
> > fixing this mrtg is working fine but the counters are staying at zero.
> >
> > Any idea how to get this working?
>
> It doesn't. This is probably the single most requested feature from
> Foundry users I speak to, but the offical party line is that they have no
> plans to implement it since "you can just get this data from sFlow"
> (sampled of course). There is a layer 2 vlan counter on newer platforms
> (like MLX/XMR), but it doesn't distinguish inbound/outbound, so it doesn't
> help for most applications.
>
> I have some fairly old and dirty code floating around (as an extension to
> the sflowd example implementation for my libsflow project) which
> replicates subinterface counters out of sflow data, if anyone wants to
> play with it. Note that it ONLY replicates subinterfaces (i.e. if you have
> port GigabitEthernet1/1 and GigabitEthernet1/2 both with vlan 123, it only
> generates data for GigabitEthernet1/1.123 and GigabitEthernet1/2.123
> counters, but not as a Ve123 counter).
>
> To download:
>
> Get libsflow from http://sourceforge.net/projects/libsflow/
> And dev ver of sflowd from http://www.e-gerbil.net/ras/sflowd-0.95.tar.gz
>
> I don't know why I'm bothering to mention this here, it's far from the
> most user friendly piece of code out there (its intended as a reference
> example for using libsflow, not as an end-user application :P), but there
> it is. Its also complicated by Foundry's irrational ifIndex grouping
> inconsistancies between platforms and versions. I suppose if there is some
> interest I could whip up a simple SNMP agent interface to the sFlow data
> (to be a little more generic, this code is currently designed for directly
> outputting to rrdtool, which clearly doesn't work for everyone :P).
>
> Any interest?
>
> --
> Richard A Steenbergen <ras at e-gerbil.net>       http://www.e-gerbil.net/ras
> GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)
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