North American Network Operators Group

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Re: Converged Networks Threat (Was: Level3 Outage)

  • From: Petri Helenius
  • Date: Thu Feb 26 14:35:41 2004

vijay gill wrote:

CEF was designed to support offloading the RP.

Not really. There existed distributed fastswitching before DCEF came along. It might still exist. CEF was developed to address the issue of route cache insertion and purging. The unneccessarily painful 60 second interval new destination stall was widely documented before CEF got widespread use. The "fast switching" approach was also particularly painful when DDOS attacks occurred.