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    Monitoring Fast Ethernet VLAN or S-VLAN Subinterfaces

    Purpose

    Display the status of Fast Ethernet interfaces, VLAN subinterfaces, or S-VLAN subinterfaces. You can use the delta keyword to specify that baselined statistics are to be shown. You can use the brief keyword to display the operational status of all configured interfaces.

    Action

    To display the status of a Fast Ethernet VLAN subinterface:

    host1:vr2#show interfaces fastEthernet 8/3.1
    FastEthernet8/3.1 is Up, Administrative status is Up
      VLAN ID: 10, address 0090.5e00.0001 
    In: Bytes 39256, Packets 612
       Multicast 0, Broadcast 0
       Errors 0, Discards 0
    Out: Bytes 4536220, Packets 70873
       Multicast 0, Broadcast 70258
       Errors 0, Discards 0
    ARP Statistics:
      In: ARP requests 1, ARP responses 0
       Errors 0, Discards 0
      Out: ARP requests 1, ARP responses 0
       Errors 0, Discards 0                

    To display the status of a Fast Ethernet S-VLAN subinterface:

    host1:vr2#show interfaces fastEthernet 0/0.1
    FastEthernet0/0.1 is Up, Administrative status is Up
      SVLAN ID: 1, VLAN ID: 0, Ethertype 0x9100
      In: Bytes 39256, Packets 612
       Multicast 0, Broadcast 0
       Errors 0, Discards 0
      Out: Bytes 4536220, Packets 70873
       Multicast 0, Broadcast 70258
       Errors 0, Discards 0
    ARP Statistics:
      In: ARP requests 0, ARP responses 0
       Errors 0, Discards 0
      Out: ARP requests 0, ARP responses 0
       Errors 0, Discards 0

    Meaning

    Table 1 lists the show interfaces fastEthernet command output fields.

    Table 1: show interfaces fastEthernet Output Fields

    Field Name

    Field Description

    Subinterface number

    Location of the subinterface that carries the VLAN or S-VLAN traffic

    Administrative status

    Operational state that you configured for this interface; up or down

    VLAN ID

    Domain number of the VLAN

    SVLAN ID

    Domain number of the stacked VLAN

    Ethertype

    Ethertype assignment for the S-VLAN subinterface, 0x8100, 0x88a8, or 0x9100; 0x9100 is the default

    In

    Analysis of inbound traffic on this interface:

    • Bytes—Number of bytes received on the VLAN or S-VLAN subinterface
    • Packets—Sum of all unicast, broadcast, and multicast packets received on the VLAN or S-VLAN subinterface
    • Multicast—Number of multicast packets received on the VLAN or S-VLAN subinterface
    • Broadcast—Number of broadcast packets received on the VLAN or S-VLAN subinterface
    • Errors—Total number of errors in all received packets; some packets might contain more than one error
    • Discards—Total number of discarded incoming packets

    Out

    Analysis of outbound traffic on this interface:

    • Bytes—Number of bytes sent on the VLAN or S-VLAN subinterface
    • Packets—Number of packets sent on the VLAN or S-VLAN subinterface
    • Multicast—Number of multicast packets received on the VLAN or S-VLAN subinterface
    • Broadcast—Number of broadcast packets received on the VLAN or S-VLAN subinterface
    • Errors—Total number of errors in all transmitted packets; some packets might contain more than one error
    • Discards—Total number of discarded outgoing packets

    Published: 2014-08-14