On 7/14/22 14:25, Mark Tinka wrote:
On 7/11/22 12:46, Paul Bone wrote:
One of my ISP customers has multiple 2Gbps national ethernet circuits
through two different providers.
Testing the circuits of Provider A gives UDP in excess of 1.8Gbps
with no packet loss, and TCP up to 1.8Gbps in both directions.
However, with provider B, I am seeing UDP packet loss when going over
1.5Gbps and TCP of less than 1Gbps even as low as 600M for upload
tests (Download tests same as provider A).
This is consistent across multiple circuits and leads me to believe
that Provider B is using a download shaper but an upload policer
which is causing significant issues with circuit speeds.
I have always tried to shape on egress at either end of a circuit
wherever possible as ingress policers can be somewhat aggressive, but
just wondering how common the use of policers is within the UK
network operators?
Not specific to the UK, but in our markets, we've tended to prefer
policing, but with sufficient burst so as to only slow things down
once the customer hits the CIR (or PIR).
Shaping (particularly on devices with little packet memory) just added
latency.
Mark.
