hi all,
i want to know about bandwith monitor.by
which i can check the bandwidth of my leased line.
because i am not getting sufficient bandwidth fron my
ISP>
i would like to know whether my ISP is not providiing
sufficient bandwidht what he promised, or there may be
a problem in our LAN.how to know the band width. is
there any tools to check the leased line bandwidth.
please help.
thanks in advance.
SRIHARI
--- John Neiberger <[EMAIL PROTECTED]> wrote:
> We have a 7513 as our backbone router and pre-12.0
> it was running on average at maybe 9-10% CPU. After
> upgrading to 12.1 and turning on CEF, that dropped
> to around 5%. That's really not a good test because
> we were hardly pushing the thing to begin with.
> Still, it does seem to make a noticable difference
> and we haven't had any problems with it.
>
> By the way, off-topic, I seem to have resolved the
> problems I had with excitemail, so I've moved back
> to using [EMAIL PROTECTED] Lately, my email address
> has been changing almost daily!
>
> John
>
> >
> > John, Bob, Raj, Phillip and the Group,
> >
> > I hadn't thought of CEF much as I "thought" it
> wasn't available on the
> > smaller routers. i.e. - only on the routers with
> line cards etc.
> >
> > However, I just enabled CEF on a 2611 and it
> created its table on the fly in
> > no time flat. The 2611 won't do dCEF however.
> Also, the smaller routers
> > can't do cef accounting.
> >
> > Anyway, now I have to mock something up in the lab
> to see if we can
> > determine how much of any improvement CEF will
> give us. Since we're not
> > using CEF anywhere in our network I can't just
> turn it on without a bit more
> > research.
> >
> > If it only lessens the CPU load by a few percent
> then bigger hardware is in
> > our future, but if we see gains of 20% or more
> then CEF would indeed be a
> > cheap solution.
> >
> > I noticed that CEF has issues with policy routing
> and other features - but
> > so far we're not using any of them.
> >
> > So, another question - does anyone have any
> idea/experience on how much CEF
> > will gain for us? Given the average 50% load on
> the router - practically
> > all switching load???
> >
> > tia
> >
> > Kevin Wigle
> >
> >
> > ----- Original Message -----
> > From: "John Neiberger" <[EMAIL PROTECTED]>
> > To: <[EMAIL PROTECTED]>
> > Cc: <[EMAIL PROTECTED]>
> > Sent: Monday, February 12, 2001 4:11 PM
> > Subject: Re: Can someone interpret this please?
> >
> >
> > > I just checked CCO and there are so many
> CPU-related bugs in 12.0(5) that
> > I stopped counting after a while. You might want
> to upgrade, if feasible.
> > >
> > > Also, try doing a show align to see if you're
> getting spurious memory
> > access errors. One of the bugs mentioned a high
> CPU usage due to these.
> > >
> > > HTH,
> > > John
> > >
> > > >
> > > > Bob, Phil - and the group.....
> > > >
> > > > Thanks for the input, gives me more to think
> about.
> > > >
> > > > Some more history..........
> > > >
> > > > This router is a 3620 with OC3 and
> FastEthernet interfaces. It has 48
> > meg
> > > > and is running 12.0(5)XK1.
> > > >
> > > > According to Cisco's docs, the 3620 should be
> able to handle around
> > 20-40
> > > > kpps.
> > > >
> > > > However, the router shows only around 2.6 kpps
> almost evenly split
> > in/out.
> > > >
> > > > I have been unable to verify exactly on CCO
> but I suspect that a 3620
> > cannot
> > > > handle (very well) two high-speed interfaces -
> more specifically if one
> > is
> > > > OC3.
> > > >
> > > > I have found info where Cisco, when talking
> about the OC3 interface for
> > the
> > > > 3600 series stated:
> > > >
> > > > "Max two high-speed network modules in a Cisco
> 3640 (includes Fast
> > Ethernet,
> > > > ATM, HSSI)"
> > > >
> > > > Now the 3640 has a 100mhz processor and the
> 3620 has a 80 mhz processor.
> > > >
> > > > I'm wondering if the SAR process is
> overwhelming the 3620? I'm sure I
> > read
> > > > someplace that only one high-speed interface
> was recommended for the
> > 3620
> > > > but I haven't found that info again.
> > > >
> > > > Considering the low level of traffic, what
> else could be keeping the cpu
> > > > utilization up so high? Need more info.....
> let me know!
> > > >
> > > > Kevin Wigle
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "Phillip Heller" <[EMAIL PROTECTED]>
> > > > To: "Kevin Wigle" <[EMAIL PROTECTED]>
> > > > Cc: "cisco" <[EMAIL PROTECTED]>
> > > > Sent: Monday, February 12, 2001 2:12 PM
> > > > Subject: Re: Can someone interpret this
> please?
> > > >
> > > >
> > > > > On Mon, 12 Feb 2001, Kevin Wigle wrote:
> > > > >
> > > > > Dear group,
> > > > >
> > > > > Investigating a router that is starting
> to loaded down. When I do
> > a
> > > > sh proc
> > > > > cpu I get 50% or cpu utilization but the
> stats don't seem to add
> > up to
> > > > 50%.
> > > > >
> > > > > Is there another way to try and see
> where the 50% is coming from?
> > > > >
> > > > > sh proc cpu
> > > > > CPU utilization for five seconds:
> 44%/44%; one minute: 50%; five
> > > > minutes:
> > > > > 52%
> > > > >
> > > > > The five second utilization numbers in the
> above line (44%/44%)
> > represent
> > > > > two things. The first number is total
> processor utilization and the
> > > > > second is processor utilization due to
> interrupts. The difference in
> > > > > these two numbers would be the sum of 5sec
> utilization by all other
> > > > > processes.
> > > > >
> > > > > If utilization due to interrupts increases
> over time, it represents
> > > > > traffic growth. If it jumps alot in a short
> amount of time, it may be
> > a
> > > > > DoS attack. You can verify the latter by
> turning on "ip route-cache
> > flow"
> > > > > on suspected interfaces and then looking at
> the output of "sh ip cache
> > > > > flow".
> > > > >
> > > > > If the processor gets too high with
> legitimate traffic, you can use
> > cef or
> > > > > dcef (ip route-cache cef, ip cef
> distributed).
> > > > >
> > > > > Failing that, you'll probably more beefy
> hardware.
> > > > >
>
=== message truncated ===
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