Make traffic for test the link

Make traffic for test the link
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Subject Author Date
Make traffic for test the link rahan 07-11-2006
Posted by rahan on July 11, 2006, 4:48 pm
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Hi All,

I have some input and CRC Errors in my serial interface (Controller
E1). I have a lot of errors when i have a lot of traffic in my serial
(channelized E1) interface. And i have verry little errors when traffic
is normal.

I think that the erros are in relation with my cable... Well.

I changed the cable and i need to generate a traffic to see if i have
errors.

I do ping/ip... and i send 200 or 1000 packets (size 1500 bytes)... i
don't have errors but i need to tress the link with traffic more fast
than ping (icmp).

So, how can i generate traffic (stress) on the link from my router to
the router of other side ?

How can i stress the link from the local router to remote router ?

Thank You very much for help

Best Regards
Rahan

Posted by BernieM on July 12, 2006, 3:29 am
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> Hi All,
>
> I have some input and CRC Errors in my serial interface (Controller E1).
> I have a lot of errors when i have a lot of traffic in my serial
> (channelized E1) interface. And i have verry little errors when traffic is
> normal.
>
> I think that the erros are in relation with my cable... Well.
>
> I changed the cable and i need to generate a traffic to see if i have
> errors.
>
> I do ping/ip... and i send 200 or 1000 packets (size 1500 bytes)... i
> don't have errors but i need to tress the link with traffic more fast than
> ping (icmp).
>
> So, how can i generate traffic (stress) on the link from my router to the
> router of other side ?
>
> How can i stress the link from the local router to remote router ?
>
> Thank You very much for help
>
> Best Regards
> Rahan

Racoon Speed Test is an easy to run Windows client-server app that generates
raw tcp streams on whatever port you like. You can run up multiple
instances of it on the same end-points to verify QOS policies or just flood
a link etc.

http://www.raccoonworks.com/Products.htm

BernieM



Posted by Rahan on July 12, 2006, 4:23 am
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> > Hi All,
> >
> > I have some input and CRC Errors in my serial interface (Controller
E1).
> > I have a lot of errors when i have a lot of traffic in my serial
> > (channelized E1) interface. And i have verry little errors when traffic
is
> > normal.
> >
> > I think that the erros are in relation with my cable... Well.
> >
> > I changed the cable and i need to generate a traffic to see if i have
> > errors.
> >
> > I do ping/ip... and i send 200 or 1000 packets (size 1500 bytes)... i
> > don't have errors but i need to tress the link with traffic more fast
than
> > ping (icmp).
> >
> > So, how can i generate traffic (stress) on the link from my router to
the
> > router of other side ?
> >
> > How can i stress the link from the local router to remote router ?
> >
> > Thank You very much for help
> >
> > Best Regards
> > Rahan
>
> Racoon Speed Test is an easy to run Windows client-server app that
generates
> raw tcp streams on whatever port you like. You can run up multiple
> instances of it on the same end-points to verify QOS policies or just
flood
> a link etc.
>
> http://www.raccoonworks.com/Products.htm
>
> BernieM
>
>

Thank You BernieM. But this product turn for Windows. I need something
directly from my router. Directly from CLI interface of my router. So, the
ping/ip command seem to be the only command for make stress on the link.

I will try SpeedTest for the futures needs.

Thanks a lot

Best Regards
Rahan



Posted by delgrun...@gmail.com on July 12, 2006, 2:08 pm
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Rahan,

If you can get the other side to cooperate with you and if this is a
plain point to point link, do this:

1. Raise the mtu on your serial interface to 4500 or so.

2. Have the other end do the same.

3. Start two concurrent ping sessions (on separate vty sessions on your
router) with 4000 - 4500 payloads for 10000 rounds or so.

note - It is important to run more than one ping because the normal
function of icmp echo request and replies insert deltas in between the
packets proportional to the size you use and the latency of the link.
On a single ping process, you will always plateau before loading your
link. Have another unrelated icmp echo request and reply process
offsets this. Obviously the more you have the more it is staggered but
generally my prescription here will suffice. Also if you are on frame
relay or doing a multilink, you are stuck with a 1500 mtu and will have
to run 6 to 10 sessions to load the link.

4. Change the load-interval on you serial interface to 30 sec.

This will load your link sufficiently.

-mike


Posted by Rahan on July 13, 2006, 2:41 am
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Thanks a lot Mike !!

Best Regards
Rahan

>
> Rahan,
>
> If you can get the other side to cooperate with you and if this is a
> plain point to point link, do this:
>
> 1. Raise the mtu on your serial interface to 4500 or so.
>
> 2. Have the other end do the same.
>
> 3. Start two concurrent ping sessions (on separate vty sessions on your
> router) with 4000 - 4500 payloads for 10000 rounds or so.
>
> note - It is important to run more than one ping because the normal
> function of icmp echo request and replies insert deltas in between the
> packets proportional to the size you use and the latency of the link.
> On a single ping process, you will always plateau before loading your
> link. Have another unrelated icmp echo request and reply process
> offsets this. Obviously the more you have the more it is staggered but
> generally my prescription here will suffice. Also if you are on frame
> relay or doing a multilink, you are stuck with a 1500 mtu and will have
> to run 6 to 10 sessions to load the link.
>
> 4. Change the load-interval on you serial interface to 30 sec.
>
> This will load your link sufficiently.
>
> -mike
>



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