Viewing Interface Statistics
Packets that need to be forwarded to the adjacent network element
or a neighboring device along a routing path might be dropped by a
router owing to several factors. Some of the causes for such a loss
of traffic or a block in transmission of data packets include overloaded
system conditions, profiles and policies that restrict the bandwidth
or priority of traffic, network outages, or disruption with physical
cable faults. You can use a number of show commands to
determine and analyze the statistical counters and metrics related
to any traffic loss and take an appropriate corrective measure. The
fields displayed in the View Interface Statistics dialog box help
in diagnosing and debugging network performance and traffic-handling
efficiency problems.
To view interface statistical details:
The Interface Details table displays all the UNI parts of the service. Also, the physical interface for the logical interface participating in the service is displayed.
Device Name—Name of the device
Interface—Name of the interface
Interface Type—Whether the interface is physical or logical
Encapsulation—Physical or logical encapsulation configured on the interface.
Operational Status—Operational status of the physical interface: Up, Down.
Admin Status—Administrative state of the interface: Enabled or Disabled.
MAC Address—MAC address of the physical interface.
Input Packets—Number of packets received on the interface.
Output Packets—Number of packets sent from the interface.
Last Poll Time—Date and time at which the statistical detail was obtained by polling and retrieving from the device for the specified interface.
The Packet Counter tab on the right side of the page displays the following fields in a table. It is applicable for physical interfaces only. The values displayed are in rates of packets per second.
Input Unicasts—Number of input unicast packets for the physical interface
Output Unicasts—Number of output unicast packets for the physical interface
Input Multicast—Number of input multicast packets for the physical interface
Output Multicast—Number of output multicast packets for the physical interface
Input Broadcast—Number of input broadcast packets for the physical interface
Output Broadcast—Number of output broadcast packets for the physical interface
The Error Counter tab on the right side of the page displays the following fields in a table. It is available for physical interfaces only. The values displayed are in rates of packets per second.
Input Errors—Number of errors packets received on the physical interface
Output Drops—Number of outgoing packets that are dropped by the physical interface
Input Framing Errors—Number of packets with framing errors that are received on the physical interface
Input Drops—Number of incoming packets that are dropped by the physical interface
Input Discards—Number of incoming packets discarded by the physical interface
Output Errors—Number of error packets sent out from the physical interface