Command:

show ip interface

Mode:

Router>
Router#


Syntax:

show ip interface interface-type number


Syntax Description:

 

type

(Optional) Specifies that information be displayed about that interface type only. The possible value depends on the type of interfaces the system has. For example, it could be Ethernet, null, serial, token ring, and so forth. 

number

(Optional) Interface number.

 


Command Description:

To display the usability status of interfaces configured for IP, use the show ip interfaceEXEC command.


Example:

 


Router#
show ip interface

FastEthernet0 is up, line protocol is up

  






  Internet address is
192.195.78.24, subnet mask is 255.255.255.240


  Broadcast address is
255.255.255.255


  Address determined by
non-volatile memory


  MTU is 1500 bytes


  Helper address is not
set


  
Secondary address 131.192.115.2, subnet mask 255.255.255.0




    Directed broadcast forwarding is enabled


  Multicast groups joined:
224.0.0.1 224.0.0.2


  Outgoing access list is
not set


  Inbound
  access list is not
set


  Proxy ARP is
enabled


  Security level is
default


  Split horizon is
enabled


  ICMP redirects are always
sent


  ICMP unreachables are
always sent


  ICMP mask replies are
never sent


  IP fast switching is
enabled


  IP fast switching on the
same interface is disabled


  IP SSE switching is
disabled


  Router Discovery is
disabled


  IP output packet
accounting is disabled


  IP access violation
accounting is disabled


  TCP/IP header compression
is disabled


  Probe proxy name replies
are disabled

  Web Cache Redirect is enabled

 

Field

Description

FastEthernet0 is up

If the interface hardware is usable, the interface is marked "up." For an interface to be usable, both the interface hardware and line protocol must be up.

line protocol is up

If the interface can provide two-way communication, the line protocol is marked "up." For an interface to be usable, both the interface hardware and line protocol must be up.

Internet address and subnet mask

IP Internet address and subnet mask of the interface.

Broadcast address

Displays the broadcast address.

Address determined by...

Indicates how the IP address of the interface was determined.

MTU

Displays the MTU value set on the interface.

Helper address

Displays a helper address, if one has been set.

Secondary address

Displays a secondary address, if one has been set.

Directed broadcast forwarding

Indicates whether directed broadcast forwarding is enabled.

Multicast groups joined

Indicates the multicast groups this interface is a member of.

Outgoing access list

Indicates whether the interface has an outgoing access list set.

Inbound access list

Indicates whether the interface has an incoming access list set.

Proxy ARP

Indicates whether Proxy Address Resolution Protocol (ARP) is enabled for the interface.

Security level

Specifies the IP Security Option (IPSO) security level set for this interface.

Split horizon

Indicates that split horizon is enabled.

ICMP redirects

Specifies whether redirect messages will be sent on this interface.

ICMP unreachables

Specifies whether unreachable messages will be sent on this interface.

ICMP mask replies

Specifies whether mask replies will be sent on this interface.

IP fast switching

Specifies whether fast switching has been enabled for this interface. It is generally enabled on serial interfaces, such as this one.

IP SSE switching

Specifies whether IP silicon switching engine (SSE) is enabled.

Router Discovery

Specifies whether the discovery process has been enabled for this interface. It is generally disabled on serial interfaces.

IP output packet accounting

Specifies whether IP accounting is enabled for this interface and what the threshold (maximum number of entries) is.

TCP/IP header compression

Indicates whether compression is enabled or disabled.

Probe proxy name

Indicates whether HP Probe proxy name replies are generated.

WCCP Redirect outbound is enabled

Indicates the status of whether packets received on an interface are redirected to a cache engine. Displays "enabled" or "disabled."

WCCP Redirect exclude is disabled

Indicates the status of whether packets targeted for an interface will be excluded from being redirected to a cache engine. Displays "enabled" or "disabled."


Misconceptions:

 

None


Related commands:

 

show interfaces

 

show access-lists


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World Wide Education








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