Internet Exchange Questions

Tue Mar 19 22:12:42 UTC 2002

    > > I know of 323 IXes today.
    > > http://www.pch.net/documents/data/exchange-points/ep-in-addrs.xls
    >
    > 	Well, this is one place where we diverge... :)
    > 	I'd state that there are 323 prefixes in use at exchanges
    > 	but that there are somewhat fewer switch fabrics in place, e.g.
    > 	a single switch fabric can & does host more than one prefix.

Correct.  And there are sometimes multiple switch fabrics in one facility,
usually in the case that there are separate fabrics/subnets for IPv4
unicast, multicast, and IPv6.

                                -Bill