Did CIDR Really Slow Routing Table Growth?

• Yes

• • Exponential growth from 1990-1994
  • Once CIDR was instituted growth was linear until 1999

• From about mid-1999 to the end of 2001, growth was exponential again

• • A lot of people noticed this and have become worried
  • Some have put the blame on gratuitous multihoming
  • • Multihoming has the advantage of facilitating site redundancy and reliability
    • When a site is multihomed it connects to more than one ISP and advertises at least one network prefix per ISP