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Using Ethernet show Commands

Use the show commands described in this section to display information about your Ethernet configuration and to monitor Ethernet interfaces.

show interfaces fastEthernet

Use to display the status of Fast Ethernet interfaces, VLAN subinterfaces, or S-VLAN subinterfaces.
You can specify the following keywords:
- delta—Specifies that baselined statistics are to be shown
- brief—Displays the operational status of all configured interfaces
Field descriptions when you display the status of a Fast Ethernet VLAN or S-VLAN subinterface
- 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 sent on the VLAN or S-VLAN subinterface
  - Broadcast—Number of broadcast packets sent on the VLAN or S-VLAN subinterface
  - Errors—Total number of errors in all transmitted packets; note that some packets might contain more than one error
  - Discards—Total number of discarded outgoing packets

Example 1—Displays 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

Example 2—Displays 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

See show interfaces.

show interfaces gigabitEthernet

show interfaces tenGigabitEthernet

Use to display the status of Gigabit Ethernet interfaces, 10-Gigabit Ethernet interfaces, VLAN subinterfaces, or S-VLAN subinterfaces.
You can specify the following keywords:
- delta—Specifies that baselined statistics are to be shown
- brief—Displays the operational status of all configured interfaces
Field descriptions when you display the status of a Gigabit Ethernet or 10-Gigabit Ethernet VLAN or S-VLAN subinterface
- 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 sent on the VLAN or S-VLAN subinterface
  - Broadcast—Number of broadcast packets sent 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

Example 1—Displays the status of a Gigabit Ethernet VLAN subinterface

host1:vr2#show interfaces gigabitEthernet 2/0.1
GigabitEthernet2/0.1 is Up, Administrative status is Up
  VLAN ID: 10, address 0090.5e00.0001

  In: Bytes 2357, Packets 23
   Multicast 0, Broadcast 0
   Errors 0, Discards 0
  Out: Bytes 4872, Packets 57
   Multicast 0, Broadcast 0
   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

Example 2—Displays the status of a Gigabit Ethernet S-VLAN subinterface

host1:vr2#show interfaces gigabitEthernet 2/0.2
GigabitEthernet2/0.2 is Up, Administrative status is Up
  SVLAN ID: 10, VLAN ID: 100, Ethertype 0x9100

  In: Bytes 2357, Packets 23
   Multicast 0, Broadcast 0
   Errors 0, Discards 0
  Out: Bytes 4872, Packets 57 
   Multicast 0, Broadcast 57
ARP Statistics:
  In: ARP requests 0, ARP responses 0
   Errors 0, Discards 0
  Out: ARP requests 0, ARP responses 0
   Errors 0, Discards 0

See show interfaces.

show vlan subinterface

Use to display configuration and status information for a specified VLAN subinterface or for all VLAN subinterfaces configured on the router.
Use the summary keyword to display only the counts of all VLAN subinterfaces and VLAN major interfaces configured on the router.
Use the mac-address keyword to display information about the VLAN subinterfaces that were configured with unique MAC addresses.
Use the vlan or svlan keywords to display information about specific S-VLAN IDs or VLAN IDs.
Field descriptions
- 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 maximum transmission unit (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
- Total VLAN interfaces—Total numbers of VLAN subinterfaces and VLAN major interfaces configured on the router; this is the only field that appears when you specify the summary keyword

Example 1—Displays full status and configuration information for all VLAN subinterfaces configured on the router

host1#show vlan subinterface
        Interface           Status   MTU  Svlan Id Vlan Id  Ethertype  Type
------------------------- ---------- ---- -------- -------- --------- -------
ATM 3/0.1.2               Up         1522 ----     11       ----      Static
ATM 3/0.1.3               Up         1522 ----     12       ----      Static
ATM 3/1.1.1               Up         1522 ----     13       ----      Static
ATM 3/1.1.2               Up         1522 ----     14       ----      Static
ATM 3/2.1.1               Down       1526 4        255      0x9100    Static   
FastEthernet 4/5.1        Up         1522 ----     1        ----      Dynamic
6 vlan subinterfaces found

Example 2—Displays 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

Example 3—Displays only brief summary information for all VLAN subinterfaces configured on the router
```
host1#show vlan subinterface summary
Total VLAN interfaces: 6 subinterfaces, 3 major interfaces
```

Example 4—Displays full status and configuration information for all VLAN subinterfaces configured with a unique MAC address

host1#show vlan subinterface mac-address
        Interface          Svlan Id  Vlan Id    MAC Address
-------------------------  --------  --------  --------------
FastEthernet 4/0.25            ----        25  0090.dfad.2abd
FastEthernet 4/0.10050            1        50  0090.adad.0abd
2 vlan subinterfaces found

Example 5—Displays full status and configuration information for a VLAN subinterface on a LAG bundle

host1#show vlan subinterface lag boston.1
        Interface           Status   MTU  Svlan Id Vlan Id  Ethertype  Type 
------------------------- ---------- ---- -------- -------- --------- -------
lag boston.1              Up         1522 ----     1        ----      Static

Example 6—Displays full status and configuration information for the specified S-VLAN ID

host1#show vlan subinterface svlan 100 53
        Interface           Status   MTU  Svlan Id Vlan Id  Ethertype  Type
------------------------- ---------- ---- -------- -------- --------- -------
FastEthernet 0/0.1        Up         1526 100      53       0x9100    Static
FastEthernet 4/6.1        Up         1526 100      53       0x9100    Dynamic
2 vlan subinterfaces found

See show vlan subinterface.

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