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Re: Another SAP Storm?


Chronological Thread 
  • From: Hank Nussbacher <>
  • To: Zenon Mousmoulas <>
  • Cc:
  • Subject: Re: Another SAP Storm?
  • Date: Wed, 19 Sep 2012 09:27:31 +0300

At 23:45 11/06/2008 +0300, Zenon Mousmoulas wrote:


On 11 Ιουν 2008, at 10:32 ΜΜ, Niels den Otter wrote:

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Hello Pekka,

Pekka Savola wrote:
We've for years now installed policers in our upstream/peering
interfaces which rate-limit SAP to 1 mbit/s. That has saved our
and our
customers' backsides a couple of times already -- without crippling
the
real use of SAP.

Would you happen to have an example Junos configuration to do this
in global configuration?

Not sure about JunOS, but I believe this should do the trick for Cisco
IOS:

ip access-list standard SAP-mcast-group
permit host 224.2.127.254
deny any any
exit

interface X/Y.Z
ip multicast rate-limit in group-list SAP-mcast-group 1000
exit

This should be applied at (interfaces facing) the edges of your
multicast network. It effectively means that any sources the router
sees with a rate exceeding 1000 kbps, it will not forward downstream.

Sorry for digging up old emails (4 years later) but due to the latest SAP storm I just went and tried to check
ip multicast rate-limit in group-list SAP-mcast-group 1000
on 12.2(33)SRE6 and got:
This command is no longer supported

Ideas?

Thanks,
Hank


Sorry if it's slightly off-topic.

Best regards,
Zenon Mousmoulas
GRNET




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