06-Layer 3 - IP Services

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02-IP addressing commands
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IP addressing commands

display ip interface

Use display ip interface to display IP configuration and statistics for Layer 3 interfaces.

Syntax

display ip interface [ interface-type interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface-type interface-number: Specifies an interface by its type and number. If you do not specify an interface, the command displays information about all Layer 3 interfaces.

Usage guidelines

Use the display ip interface command to display IP configuration and statistics for the specified Layer 3 interface. The statistics include the following information:

·     The number of unicast packets, bytes, and multicast packets the interface has sent and received.

·     The number of TTL-invalid packets and ICMP packets the interface has received.

The packet statistics helps you locate a possible attack on the network.

Examples

# Display IP configuration and statistics for VLAN-interface 10.

<Sysname> display ip interface vlan-interface 10

Vlan-interface10 current state : DOWN

Line protocol current state : DOWN

Internet Address is 1.1.1.1/8 Primary

Broadcast address : 1.255.255.255

The Maximum Transmit Unit : 1500 bytes

input packets : 0, bytes : 0, multicasts : 0

output packets : 0, bytes : 0, multicasts : 0

TTL invalid packet number:         0

ICMP packet input number:          0

  Echo reply:                      0

  Unreachable:                     0

  Source quench:                   0

  Routing redirect:                0

  Echo request:                    0

  Router advert:                   0

  Router solicit:                  0

  Time exceed:                     0

  IP header bad:                   0

  Timestamp request:               0

  Timestamp reply:                 0

  Information request:             0

  Information reply:               0

  Netmask request:                 0

  Netmask reply:                   0

  Unknown type:                    0

Table 1 Command output

Field

Description

current state

Current physical state of the interface:

·     Administrative DOWN—The interface is shut down with the shutdown command.

·     DOWN—The interface is administratively up but its physical state is down, which might be caused by a connection or link failure.

·     UP—Both the administrative and physical states of the interface are up.

Line protocol current state

Current state of the link layer protocol:

·     DOWN—The protocol state of the interface is down.

·     UP—The protocol state of the interface is up.

·     UP (spoofing)—The protocol state of the interface pretends to be up. However, no corresponding link is present, or the corresponding link is not present permanently but is established as needed.

Internet Address

IP address of an interface followed by:

·     Primary—A primary IP address.

·     Sub—A secondary IP address.

·     MTunnel—An MTunnel interface IP address. The device does not support this field in the current software version.

·     SSLVPN—An SSL VPN interface IP address. The device does not support this field in the current software version.

·     PPP-Negotiated—A PPP negotiated IP address.

·     Unnumbered—An unnumbered IP address. The device does not support this field in the current software version.

·     DHCP-Allocated—An IP address obtained through DHCP.

·     BOOTP-Allocated—An IP address obtained through BOOTP.

·     Cluster—An IP address of an IRF fabric.

·     Mad—A MAD IP address. The device does not support this field in the current software version.

Broadcast address

Broadcast address of the subnet attached to an interface.

The Maximum Transmit Unit

Maximum transmission units on the interface, in bytes.

input packets, bytes, multicasts

output packets, bytes, multicasts

Unicast packets, bytes, and multicast packets received on an interface (statistics start at the device startup).

TTL invalid packet number

Number of TTL-invalid packets received on the interface (statistics start at the device startup).

ICMP packet input number:

  Echo reply:

  Unreachable:

  Source quench:

  Routing redirect:

  Echo request:

  Router advert:

  Router solicit:

  Time exceed:

  IP header bad:

  Timestamp request:

  Timestamp reply:

  Information request:

  Information reply:

  Netmask request:

  Netmask reply:

  Unknown type:

Total number of ICMP packets received on the interface (statistics start at the device startup):

·     Echo reply packets.

·     Unreachable packets.

·     Source quench packets.

·     Routing redirect packets.

·     Echo request packets.

·     Router advertisement packets.

·     Router solicitation packets.

·     Time exceeded packets.

·     IP header bad packets.

·     Timestamp request packets.

·     Timestamp reply packets.

·     Information request packets.

·     Information reply packets.

·     Netmask request packets.

·     Netmask reply packets.

·     Unknown type packets.

 

Related commands

·     display ip interface brief

·     ip address

display ip interface brief

Use display ip interface brief to display brief IP configuration for Layer 3 interfaces.

Syntax

display ip interface [ interface-type [ interface-number ] ] brief [ description ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface-type: Specifies the interface type.

interface-number: Specifies the interface number.

description: Displays complete interface descriptions. If you do not specify this keyword, the command displays a maximum of 16 characters for each interface description. If the description is longer than 16 characters, the first 14 characters are displayed, followed by an ellipsis (...).

Usage guidelines

Information displayed by the command includes the state of the physical and link layer protocols, IP address, and interface descriptions.

If you do not specify the interface type and interface number, the command displays brief IP configuration for all Layer 3 interfaces.

If you specify only the interface type, the command displays brief IP configuration for all Layer 3 interfaces of the specified type.

If you specify both the interface type and interface number, the command displays brief IP configuration for the specified interface.

Examples

# Display brief IP configuration for VLAN interfaces.

<Sysname> display ip interface vlan-interface brief

*down: administratively down

(s): spoofing  (l): loopback

Interface                Physical Protocol IP Address      Description    

Vlan10                   down     down     6.6.6.1         --

Vlan2                    down     down     7.7.7.1         --

<Sysname> display ip interface vlan-interface brief description

*down: administratively down

(s): spoofing  (l): loopback

Interface                Physical Protocol IP Address      Description

Vlan10                   down     down     6.6.6.1         --

Vlan2                    down     down     7.7.7.1         --

Table 2 Command output

Field

Description

*down: administratively down

The interface is administratively shut down with the shutdown command.

(s) : spoofing

Spoofing attribute of the interface. It indicates that an interface might have no link present even when its link layer protocol is up or the link is established only on demand.

Interface

Interface name.

Physical

Physical state of the interface:

·     *down—The interface is administratively shut down with the shutdown command.

·     down—The interface is administratively up but its physical state is down (possibly because of poor connection or line failure).

·     up—Both the administrative and physical states of the interface are up.

Protocol

Link layer protocol state of the interface:

·     down—The protocol state of the interface is down.

·     down(l)—The protocol state of the interface is down (loopback).

·     up—The protocol state of the interface is up.

·     up(l)—The protocol state of the interface is up (loopback).

·     up(s)—The protocol state of the interface is up (spoofing).

IP Address

IP address of the interface. If no IP address is configured, this field displays hyphens (--).

Description

Interface description information. If no description is configured, this field displays hyphens (--).

 

Related commands

·     display ip interface

·     ip address

ip address

Use ip address to assign an IP address to the interface.

Use undo ip address to remove the IP address from the interface.

Syntax

ip address ip-address { mask-length | mask } [ sub ]

undo ip address [ ip-address { mask-length | mask } [ sub ] ]

Default

No IP address is assigned to an interface.

Views

Interface view

Predefined user roles

network-admin

Parameters

ip-address: Specifies the IP address of the interface, in dotted decimal notation.

mask-length: Specifies the subnet mask length in the range of 1 to 31. For a loopback interface, the value range is 1 to 32.

mask: Specifies the subnet mask in dotted decimal notation.

sub: Assigns a secondary IP address to the interface.

Usage guidelines

Use the command to configure a primary IP address for an interface. If the interface connects to multiple subnets, configure primary and secondary IP addresses on the interface so the subnets can communicate with each other through the interface.

An interface can have only one primary IP address. A newly configured primary IP address overwrites the previous address.

You cannot assign secondary IP addresses to an interface that obtains an IP address through BOOTP, DHCP, or PPP address negotiation.

The undo ip address command removes all IP addresses from the interface. The undo ip address ip-address { mask | mask-length } command removes the primary IP address. The undo ip address ip-address { mask | mask-length } sub command removes a secondary IP address.

The primary and secondary IP addresses assigned to the interface can be located on the same network segment. Different interfaces on your device must reside on different network segments.

Examples

# Assign VLAN-interface 10 a primary IP address 129.12.0.1 and a secondary IP address 202.38.160.1, with subnet masks both 255.255.255.0.

<Sysname> system-view

[Sysname] interface vlan-interface 10

[Sysname-Vlan-interface10] ip address 129.12.0.1 255.255.255.0

[Sysname-Vlan-interface10] ip address 202.38.160.1 255.255.255.0 sub

Related commands

·     display ip interface

·     display ip interface brief