Why different SLA for MPLS IP/VPN and Internet Access??

[alainflecha]

Hello!

I am studying SLAs in terms of services of VPN (MPLS Layer2 and Layer3) and Internet Access. My doubt is why the enterprises do establish two different SLA (one for VPN service and another one for VPN) if the parameters determined in both are the same (latency,jitter...). Does it have something to do the fact that the service of Internet access cannot be so controlled by te enterprise as the traffic goes out the infraestructure under the enterprise control?

Thanks in advance!

[smitesh kharecha · Accepted solution]

Hi Alain,

Different IP SLA are use as when you have MPLS VPN provider, all or most of the site will be provided connectivity by same provider. Hence, when it comes to time sensitive traffic or any traffic which is INTRANET for your organization it will be staying on provider's backbone/ network only.

However, in case of internet, it has to break out from your provider's network and would  be travelling across don't know how many other provider's ASes. Also, practically using IP SLA for internet doesn't have much use as nobody can assure you SLA level over the internet.

HTH,

Smitesh