Hi, I think if you are running VoATM then choosing ATM would be effective. But if you are running VoIP then I think all bets are off as far as ATM concern. Frame Relay is designed to optimize for data traffic and VoIP is just another type of data. So I would prefer Frame Relay better (I found it easier to troubleshoot a FR-FR connection than FR-ATM connection). I have ran both VoATM(native) and VoFR(native) and I did not see much different between the two (70 remote sites with 10 VoATM and 60 VoIP). I guess beside LLQ, you can use RSVP. One thing about VoIP over Frame Relay is that you do not want to burst over the frame (i.e. be = 0 => max transmission speed = CIR ). I have an article from cisco on VoIP / FR and Data/FR configuration that deals with this kind of issues. If you interested, let me know. I'm about to do VoIP for some sites currently thinking of LLQ - CBWFQ and prioritizing traffic using ip precedence. From what I read, it should give me fairly good response. Cheers, TD
""John Neiberger"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Just a quick opinion poll for those of you who have implemented VoIP. > Given a medium-sized partially-meshed network, would you prefer to use > ATM or Frame Relay for your transport? Assume that most locations would > have DS1 speeds only. > > I ask this because I've been hearing a mixture of opinions. It seems > to me that ATM would allow us to utilize its CoS. With FR you don't > have much control over your traffic beyond FRTS and LLQ. Once it hits > the cloud you're at its mercy. > > However, I haven't heard any details yet but apparently someone at > Cisco thinks that ATM has some scalability problems that FR doesn't > have. I can't imagine what that would be so it will be interesting to > hear what he has to say. I'd be surprised if he suggests FR instead of > ATM. > > Right now, we have a large frame relay network but I'm seriously > considering migrating portions of it to ATM. After hearing these > conflicting opinions I'm really not sure which path to take. > > Any thoughts? > > Thanks, > John Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=21961&t=21948 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
