On Mon, 8 Jul 2002, Tito Basa wrote:
Hi,
My experience with both high speed and low speed ATM links over a
public (or private) ATM network is that you lose anywhere between 15-25%,
the higher rates are seen on public ATM networks, depending on how the PTT
is doing its job with the ATM switches and shaping.
--Ariel
> Hi!
>
> I'm playing with a PA-A3-T3 on our new ATM
> link and vbr-nrt SIR15M/PIR30M
>
> when I monitored my traffic on MRTG I can only see
> traffic being clipped at 12.8Mbps. Is there a simple
> explanation for this (overhead?)as 48 bytes/53 bytes
> is not equal to 12.8/15 or did I miss something?
>
> below is my test config:
>
> interface ATM3/0
> no ip address
> no ip directed-broadcast
> no ip route-cache cef
> atm scrambling cell-payload
> no atm ilmi-keepalive
> no atm enable-ilmi-trap
> !
> interface ATM3/0.1 point-to-point
> description
> ip address x.x.x.x 255.255.255.252
> no ip directed-broadcast
> no atm enable-ilmi-trap
> pvc 1/32
> vbr-nrt 30000 15000 100
>
> is there anything I can do to get the 15 Mbps. I
> understand that PIR is quite diffrent from the
> usual definition of burst as described in the link
> below:
>
> http://www.cisco.com/warp/public/121/atm_vbrshape.shtml
>
> thanks in advance!
>
> tito
>
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-- Ariel Biener e-mail: ariel@post.tau.ac.il PGP(6.5.8) public key http://www.tau.ac.il/~ariel/pgp.html
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