On 13/08/2010 17:00, Heath Jones wrote:
Robert's response pretty much covers it all really. If those 2 ISP's are advertising /24's out to the wider internet, your screwed. Traffic will never come down via this new ISP. The way to solve it, is to advertise the /24's as you already are, but get those 2 ISP's to summarize into a /18 before they export, or you
That's quite a confusing explanation. You don't get the ISP to "summrize" anything. You announce both the /18 and the /24s. The /24s should be advertised either with no-export or with other communities to suppress their advertisement outside of the ISPs (or region) involved.
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