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    Monitoring VLAN Statistics

    Purpose

    Display configuration and status information for a specified VLAN subinterface or for all VLAN subinterfaces configured on the router. You can use the mac-address keyword to display information about the VLAN subinterfaces that were configured with unique MAC addresses.

    Action

    To display full status and configuration information for the specified VLAN subinterface:

    host1#show vlan subinterface fastEthernet 0/0.1
        Interface       Status  MTU  Svlan Id Vlan Id Ethertype Type
    ------------------- ------ ---- -------- ------ --------- -------
    FastEthernet 0/0.1    Up    1526    1      0    0x9100    Static
                                                                                   
    In: Bytes 39256, Packets 612
       Multicast 0, Broadcast 0
       Errors 0, Discards 0
      Out: Bytes 4538652, Packets 70911
       Multicast 0, Broadcast 70296
       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 vlan subinterface command output fields.

    Table 1: show vlan subinterface Output Fields

    Field Name

    Field Description

    Interface

    Type and specifier of the VLAN subinterface

    Status

    Status of the VLAN subinterface: up, down, dormant, lowerLayerDown, absent

    MTU

    Maximum allowable size (in bytes) of the MTU for the VLAN subinterface

    Svlan Id

    S-VLAN ID value, if configured

    Vlan Id

    VLAN ID value for the VLAN subinterface

    Ethertype

    S-VLAN Ethertype value, if configured

    Type

    Type of VLAN subinterface:

    • Static—VLAN or S-VLAN subinterface was configured statically
    • Dynamic—VLAN or S-VLAN subinterface was configured dynamically

    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

    ARP Statistics

    Analysis of ARP traffic on this interface; In fields are for traffic received on the interface and Out fields are for traffic sent on the interface:

    • ARP requests—Number of ARP requests
    • ARP responses—Number of ARP responses
    • Errors—Total number of errors in all ARP packets
    • Discards—Total number of discarded ARP packets

    Published: 2014-08-20