Merit Network
Can't find what you're looking for? Search the Mail Archives.
  About Merit   Services   Network   Resources & Support   Network Research   News   Events   Home

Discussion Communities: Merit Network Email List Archives

North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: Do ATM-based Exchange Points make sense anymore?

  • From: Paul Vixie
  • Date: Fri Aug 09 22:36:19 2002

> > What functionality does PVC give you that the ethernet VLAN does not?
>
> Thatīs quite easy. Endpoint liveness. A IPv4 host on a VLAN has no idea
> if the guy on the "other end" died until the BGP timer expires.
> 
> FR has LMI, ATM has OAM. (and ILMI)

Adding complexity to a system increases its cost but not nec'ily its value.
Consider the question: how often do you expect endpoint liveness to matter?

If the connection fabric between your routers has an MTBF best measured in
hours or days, then you've got bigger problems than you'll solve with LMI.

If on the other hand the MTBF is best measured in months or years, then when
it does fail the failure is likely to be *in* the extra complexity you added.
-- 
Paul Vixie




Discussion Communities


About Merit | Services | Network | Resources & Support | Network Research
News | Events | Contact | Site Map | Merit Network Home


Merit Network, Inc.