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 12 lists the show interfaces fastEthernet command output fields.

Table 12: 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

Related Documentation