The default view shows the device's network interfaces for which
the traffic statistics are available. Expanded view can be seen by
clicking the [%em('Show InOut_bps for all interfaces')%] shortcut.
It would show input/output graphs for all interfaces on a single page.
Input discards may occur when the packets arrive from the interface
media, and the router is not able to process them. This can possibly
occur because of performance problems.
Output discards may occur when the router has prepared packets for
transmission, but the interface is not able to send them. This
may happen because of not enough available bandwidth on
the output interface.
Input errors usually mean that the interface receives broken packets
from the media. This migh be caused by problems with the physical
condition of the transmission media, or elecrical interference.
Output errors occur when the interface is not able to send packets
to the media for some reasons.