Network storm Ostinato
morten....@teammaritime.com
Hi Srivats
My company will use Ostinato to perform network storm tests on small local LANs.
There are three different scenarios that we would like to set up:
- Unicast Storm
- Multicast Storm
- Broadcast Storm.
We have already accomplished to create a Unicast storm by sending ICMP packages with Echo Request to a controller. However, we have still not managed to create a broadcast storm or multicast storm. For a broadcast storm we tried to send UDP-packages to IP-address 255.255.255.255 and MAC-address FF:FF:FF:FF:FF:FF. However, our network seemed to be untouched even though broadcast storm protection on the switch were turned off.
Lastly, I wonder how we should set up our multicast. How do we choose MAC address for multicast, and how do we choose IP-address for multicast? The Ip addresses on the LAN only differ by the last byte.
I would really appreciate to hear from you. Thank you in advance.
Best Regards,
Morten R. Hestdal
Haakon VII's gt 23c
7041 Trondheim
Norway
Mobile direct: +47 90 89 49 43
Phone office : +47 73 01 04 87
E-mail direct: morten....@teammaritime.com
E-mail office: in...@teammaritime.com
Srivats P
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Srivats P
morten....@teammaritime.com
Hi Srivats.
Thank you for following up! I purchased the Linux-version instead, and I was able to create the multicast and broadcast storms. The load of the switch are increased, (close to 100%), but the devices connected to the switch does not really fail. As I read up on multicast, I’m not even sure if any of my devices listens to any multicast groups, so perhaps this is a test we do not need to perform. As for the broadcast, I guess we have to find some way to trigger some processing in the devices instead of just sending empty UDP-packets.
Best Regards,
Morten R. Hestdal
Haakon VII's gt 23c
7041 Trondheim
Norway
Mobile direct: +47 90 89 49 43
Phone office : +47 73 01 04 87
E-mail direct: morten....@teammaritime.com
E-mail office: in...@teammaritime.com
Carlos G Mendioroz
sending from one endpoint to broadcast/multicast addresss is not going
to create a storm, just a high load.
To create a storm you need a switch replicating the traffic (amplifying
it) and just a seed.
Try placing a patch cord between to ports and disabling STP. Be carefull
not to burn the switch :)
-Carlos
morten....@teammaritime.com @ 20/08/2020 04:03 -0300 dixit:
>
>
>
> Thank you for following up! I purchased the Linux-version instead, and I
> was able to create the multicast and broadcast storms. The load of the
> switch are increased, (close to 100%), but the devices connected to the
> switch does not really fail. As I read up on multicast, I’m not even
> sure if any of my devices listens to any multicast groups, so perhaps
> this is a test we do not need to perform. As for the broadcast, I guess
> we have to find some way to trigger some processing in the devices
> instead of just sending empty UDP-packets.
>
>
>
> Best Regards,
>
>
>
> Morten R. Hestdal
>
>
>
>
>
>
>
>
>
>
> 7041 Trondheim
>
> Norway
>
> Mobile direct: +47 90 89 49 43
>
> Phone office : +47 73 01 04 87
>
> E-mail direct: morten....@teammaritime.com
>
>
> WEB www.teammaritime.com <http://www.teammaritime.com/>
>
>
>
> *From:*Srivats P <psta...@gmail.com>
> *Sent:* Tuesday, August 18, 2020 5:36 PM
> *To:* morten....@teammaritime.com
> *Cc:* ostinato <osti...@googlegroups.com>;
> <robert...@teammaritime.com>; Reidar Kvalvik
> <reidar....@teammaritime.com>
> 2. Multicast Storm
> 3. Broadcast Storm.
>
>
> We have already accomplished to create a Unicast storm by
> sending ICMP packages with Echo Request to a controller.
> However, we have still not managed to create a broadcast storm
> or multicast storm. For a broadcast storm we tried to send
> UDP-packages to IP-address 255.255.255.255 and MAC-address
> FF:FF:FF:FF:FF:FF. However, our network seemed to be untouched
> even though broadcast storm protection on the switch were turned
> off.
>
>
>
> Lastly, I wonder how we should set up our multicast. How do we
> choose MAC address for multicast, and how do we choose
> IP-address for multicast? The Ip addresses on the LAN only
> differ by the last byte.
>
>
>
> I would really appreciate to hear from you. Thank you in advance.
>
>
>
>
>
> Best Regards,
>
>
>
> Morten R. Hestdal
>
>
>
>
>
>
>
>
>
>
> 7041 Trondheim
>
> Norway
>
> Mobile direct: +47 90 89 49 43
>
> Phone office : +47 73 01 04 87
>
> E-mail direct: morten....@teammaritime.com
>
> E-mail office: in...@teammaritime.com <mailto:in...@teammaritime.com>
>
> WEB www.teammaritime.com
> <http://www.teammaritime.com/>
>
>
> --
> Get Ostinato News and Updates on Twitter - Follow @ostinato
> (http://twitter.com/ostinato)
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> You received this message because you are subscribed to the
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> https://groups.google.com/d/msgid/ostinato/006301d66f09%24739b3a70%245ad1af50%24%40teammaritime.com
>
>
>
> --
>
> Srivats P (Author, Ostinato)
>
>
>
> --
>
> Srivats P (Author, Ostinato)
>
> Get Ostinato News and Updates on Twitter - Follow @ostinato
> (http://twitter.com/ostinato)
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Carlos G Mendioroz <tr...@huapi.ba.ar> LW7 EQI Argentina
morten....@teammaritime.com
Thank you for answering. Looping the network switch did create a storm 😊
Best Regards,
Morten R. Hestdal
Haakon VII's gt 23c
7041 Trondheim
Norway
Mobile direct: +47 90 89 49 43
Phone office : +47 73 01 04 87
E-mail direct: morten....@teammaritime.com
E-mail office: in...@teammaritime.com