On 11/15/12 12:54 -0600, Mikeal Clark wrote:
Hello!
I have some AT&T MPLS sites under a managed contract with latency averaging 75-85 ms without any load. These sites are only 45 minutes away. What is considered normal/acceptable?
I recently had a scenario with some MPLS sites within the state nearly doubling in latency (below 50ms round trip). Typically I see round trip latency in the 20-35ms range, and those sites are within about a 90 minute drive from each other (Oklahoma, mostly T1s). When I asked an AT&T tech to investigate, he did not see log entries to explain the increase or admit to any trouble, and stated that the service levels for these MPLS circuits allowed for 75-80ms and I don't recall if that was one way or round trip. He said that was to allow for coast to coast latency scenarios. Delay returned to typical levels about 4 days later, without explanation. -- Dan White