Hello,
The rxload and txload parameters are computed by relating the measured throughput on the interface to the bandwidth of the interface as configured with the bandwidth command. Without this command, IOS may assign a certain default bandwidth value to the interface, but especially with virtual interfaces such as Dialers, the default value might not reflect the true capacity of the underlying link technology.
In your particular case, the bandwidth of the Dialer interface is considered to be 56 Kbps:
MTU 1490 bytes, BW 56 Kbit/sec, DLY 20000 usec,
Obviously, if the throughput through the interface exceeds 56 Kbps, the respective load counter (txload or rxload) will be at its maximum value of 255.
If you know the approximate speed of your VDSL connection, you might want to configure your Dialer1 interface with a realistic bandwidth setting, for example:
bandwidth 4096
bandwidth receive 50000
This configuration would configure the outbound (upload) reference bandwidth to 4 Mbps while the inbound (download) reference bandwidth would be set to approximately 50 Mbps (the values are in Kbps).
Please note that this setting will only help to make the rxload and txload indicators on the interface more realistic. However, these commands do not have a direct relation to the queuing performed by the router. The drops will likely not go away if you fix the bandwidth commands on your Dialer1 interface. Still, to have a realistic indicator of the interface utilization, it is always useful to have these commands configured.
Can you describe more what you mean by "intermittent drops"? Does the VDSL link go down completely and then come back again with the modem retraining, or do you see packet drops while the VDSL link itself is stable and up? Please try to include as much technical detail as possible - any outputs confirming your suspicions are helpful.
Best regards,
Peter
