We just changed a basic dsl modem for a Cisco 887VA DSL router and the throughput is very bad.the line and profile support ADSL2+. We have checked with the provider and there are not line faults and the profile applied by the provider is 2mb/12Mb [the line can support 2.5Mb/26Mb] up and down.
DSL-internet#show atm pvc interface atM 0
VCD / Peak Av/Min Burst
Interface Name VPI VCI Type Encaps SC Kbps Kbps Cells St
0 1 8 35 PVC SNAP UBR 2044 UP
We are running the following IOS: c880data-universalk9-mz.152-4.M3.bin
When we run ISP speed tests we are getting about about 500Kb/3Mb up/down with about 240ms ping tests.
Do you know if there is an issue with the ADSL2+ operation on this Cisco DSL router. It should be transparent, as regards configuration, as far as I am aware.