[nsp] PPS Interface Counters

[Lawrence Wong]

Hi Ryan,

You are correct, those are not real world figures. I
used simple numbers to represent the actual figures.
:p

Thanks for explaining how the pps is calculated. I
assume this is averaging out all the pps on all
interfaces to have a rough guage of the average pps
throughput?

Speaking of MRTG, do you know of any OID for Cisco
which shows say maybe the 5 minute average pps ?

I tried to view .1.3.6.1.2.1.4.6.0 and it shows an
ever increasing counter.

IP-MIB::ipForwDatagrams.0 = Counter32: 3650827250
IP-MIB::ipForwDatagrams.0 = Counter32: 3650828792

TIA!

--- Ryan O'Connell <ryan at complicity.co.uk> wrote:
> Lawrence Wong wrote:
> 
> >Hi all,
> >
> >I would like to check with you on how do we read
> the
> >"pps" counters on a Cisco router interface?
> >
> >Meaning for example with a router of 2 interfaces
> so
> >traffic either goes from 0/0 to 0/1 or from 0/1 to
> 0/0
> >or gets dropped :
> >
> > fa0/0 says 100pps in, 200pps out
> > fa0/1 says 300pps in and 150pps out
> >
> >Does that mean that the router is altogther
> forwarding
> >100+200+300+150 = 750pps?
> >
> >Or is it just forwarding 100 + 200 = 300pps?
> >  
> >
> 
> The router is forwarding (100 + 200 + 300 + 150) / 2
> = 375pps. 
> Presumably, some packets are going in one interface
> and back out the 
> same interface if the statistics you quoted are
> real-world, but they 
> seem a bit low for a production network.
> 
> In any reasonable real-world network not using
> Multicast for production 
> traffic, Multicast/Broadcast shouldn't account for
> anything close to a 
> significant portion of total pps. (Ditto for packets
> originated by the 
> router itself - although someone is now going to
> pipe up and say they 
> have a network with a significant amount of
> broadcast on it I'm sure :-)
> 
> If you're using Cricket/MRTG/etc, .1.3.6.1.2.1.4.6.0
> will give you the 
> total number of packets switched by a Cisco device
> where supported. (I 
> know 7200s do support it and 2900s don't, I haven't
> checked other kit I 
> have here to see if they're reporting it)
> 
> -- 
>          Ryan O'Connell - CCIE #8174
> 
> I'm not losing my mind, no I'm not changing my
> lines,
> I'm just learning new things with the passage of
> time
> 
> 



		
__________________________________
Do you Yahoo!?
Yahoo! Mail - You care about security. So do we.
http://promotions.yahoo.com/new_mail