7 Mar
2010
7 Mar
'10
9:45 a.m.
* Thomas Magill:
1. Why don't providers use /31 addresses for P2P links? This works fine per rfc 3021 but nobody seems to believe it or use it. Are there any major manufacturers out there that do not support it?
Not all vendors support it, especially not over Ethernet.
2. Longer than /24 prefixes in global BGP table. The most obvious answer is that some hardware may not handle it...
I think the main problem today is update rate, not actual prefix count. In any case, it seems rather unlikely that less aggregation brings more IP addresses into play. Smaller RIR allocations, perhaps, but beyond the /24 barrier, you'll soon have better global connectivity over IPv6.