North American Network Operators Group

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Re: Level 3 RFO

  • From: Florian Weimer
  • Date: Mon Oct 24 07:27:52 2005

* Daniel Roesen:

> On Sun, Oct 23, 2005 at 09:48:58PM +0200, Florian Weimer wrote:
>> This isn't the first time this has happened to an ISP. 8-(
> Indeed.
>> Are there any configuration tweaks which can locally confine such an
>> event?  Something like the hard prefix limit for BGP, perhaps.
> JunOS:
> set protocols ospf prefix-export-limit <n>
> set protocols isis level <n> prefix-export-limit <n>

Wouldn't an import limit be better?  If you've got a
almost-fully-meshed MPLS core, export limits won't really work, will

In more traditional networks, I can imagine that it helps to confine
anomalies.  Has anybody tried that on a real network? 8-)