Deployment Guide

Interfaces | 609
MTU 1554... Displays link and IP MTU information.
If the chassis is in Jumbo mode, this number can range from 576 to 9252.
LineSpeed Displays the interface’s line speed.
ARP type:... Displays the ARP type and the ARP timeout value for the interface.
Last clearing...
Displays the time when the
show interfaces counters where cleared.
Queuing strategy... States the packet queuing strategy. FIFO means first in first out.
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
Table 23-5. Lines in show interfaces Command Example (EtherScale) (continued)
Line Description