Reference Guide

Interfaces | 593
Input Statistics: Displays all the input statistics including:
• Number of packets and bytes into the interface
• Number of packets with IP headers, VLAN tagged headers and MPLS
headers
Note: The sum of the number of packets may not be as expected since
a VLAN tagged IP packet counts as both a VLAN packet and an IP
packet.
• Packet size and the number of those packets inbound to the interface
• Number of symbol errors, runts, giants, and throttles packets:
symbol errors = number packets containing bad data. That is, the port
MAC detected a physical coding error in the packet.
runts = number of packets that are less than 64B
giants = packets that are greater than the MTU size
throttles = packets containing PAUSE frames
Note: Symbol errors is supported on E-Series EtherScale only.
• Number of CRC, IP Checksum, overrun, and discarded packets:
CRC = packets with CRC/FCS errors
IP Checksum = packets with IP Checksum errors
overrun = number of packets discarded due to FIFO overrun conditions
discarded = the sum of input symbol errors, runts, giants, CRC, IP
Checksum, and overrun packets discarded without any processing
Output Statistics: Displays output statistics sent out of the interface including:
• Number of packets, bytes and underruns out of the interface
packets = total number of packets
bytes = total number of bytes
underruns = number of packets with FIFO underrun conditions
• Number of Multicast, Broadcast and Unicast packets:
Multicasts = number of MAC multicast packets
Broadcasts = number of MAC broadcast packets
Unicasts = number of MAC unicast packets
• Number of IP, VLAN and MPLs packets:
IP Packets = number of IP packets
Vlans = number of VLAN tagged packets
MPLS = number of MPLS packets (found on a LSR interface)
• Number of throttles and discards packets:
throttles = packets containing PAUSE frames
discarded = number of packets discarded without any processing
Rate information... Estimate of the input and output traffic rate over a designated interval (30 to
299 seconds).
Traffic rate is displayed in bits, packets per second, and percent of line rate.
Time since... Elapsed time since the last interface status change (hh:mm:ss format).
Table 18-5. Lines in show interfaces Command Example (EtherScale) (continued)
Line Description