IP addressing configuration commands 1

display ip interface· 1

display ip interface brief 3

ip address 5

ip address unnumbered· 6

 

display ip interface

Syntax

display ip interface [ interface-type interface-number ] [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

interface-type interface-number: Specifies an interface by its type and number.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

exclude: Displays all lines that do not match the specified regular expression.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display ip interface command to display IP configuration information for a specified Layer 3 interface or all Layer 3 interfaces.

Examples

# Display IP configuration information for interface GigabitEthernet 3/1/1.

<Sysname> display ip interface gigabitethernet 3/1/1

GigabitEthernet3/1/1 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

ARP packet input number:           0

  Request packet:                  0

  Reply packet:                    0

  Unknown packet:                  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

DHCP packet deal mode:  global

Table 1 Output description

Field	Description
current state	Current physical state of the interface: ·       Administrative DOWN—Indicates that the interface is administratively down; that is, the interface is shut down with the shutdown command. ·       DOWN—Indicates that the interface is administratively up but its physical state is down, which may be caused by a connection or link failure. ·       UP—Indicates that both the administrative and physical states of the interface are up.
Line protocol current state	Current state of the link layer protocol: ·       DOWN—Indicates that the protocol state of the interface is down. ·       UP—Indicates that the protocol state of the interface is up. ·       UP (spoofing)—Indicates that 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—Identifies a primary IP address, or ·       Sub—Identifies a secondary IP address. ·       negotiated—Identifies a PPP negotiated IP address. ·       unnumbered—Identifies an unnumbered IP address. ·       acquired via DHCP—Identifies an IP address obtained through DHCP. ·       acquired via BOOTP—Identifies an IP address obtained through BOOTP. ·       Cluster—Identifies a cluster IP address. ·       Mad—Identifies a MAD IP address.
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 (the statistics start at the router startup).
ARP packet input number:   Request packet   Reply packet   Unknown packet	Total number of ARP packets received on an interface (the statistics start at the router startup), including: ·       ARP request packets ·       ARP reply packets ·       Unknown packets
TTL invalid packet number	Number of TTL-invalid packets received on an interface (the statistics start at the router 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 an interface (the statistics start at the router startup), including the following packets: ·       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 ·       Network mask request packets ·       Network mask reply packets ·       Unknown type packets

 

display ip interface brief

Syntax

display ip interface [ interface-type [ interface-number ] ] brief [ | { begin | exclude | include } regular-expression ]

View

Any view

Default level

1: Monitor level

Parameters

interface-type: Interface type.

interface-number: Interface number.

|: Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide.

begin: Displays the first line that matches the specified regular expression and all lines that follow.

exclude: Displays all lines that do not match the specified regular expression.

include: Displays all lines that match the specified regular expression.

regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.

Description

Use the display ip interface brief command to display brief IP configuration information about a specified Layer 3 interface or all Layer 3 interfaces.

Note that:

·           Without the interface type and interface number specified, the brief IP configuration information for all Layer 3 interfaces is displayed;

·           With only the interface type specified, the brief IP configuration information about all Layer 3 interfaces of the specified type is displayed;

·           With both the interface type and interface number specified, only the brief IP configuration information for the specified interface is displayed.

Related commands: display ip interface.

Examples

# Display brief information about GigabitEthernet interfaces.

<Sysname> display ip interface GigabitEthernet brief

*down: administratively down

(s): spoofing  (l): loopback

Interface          Physical Protocol IP Address      Description

GE1/0/1            up       up       192.168.20.231  --

GE1/0/5            down     down     --              --

Table 2 Output description

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 whose link layer protocol is displayed up may have no link present or the link is set up only on demand.
(l) : loopback	PPP and HDLC support link loopback detection.
Interface	Interface name.
Physical	Physical state of interface: ·       *down—Indicates that the interface is administratively down; that is, the interface is shut down with the shutdown command. ·       down—Indicates that the interface is administratively up but its physical state is down, which may be caused by a connection or link failure. ·       up—Indicates that both the administrative and physical states of the interface are up. ·       up(l)—Indicates that the protocol state of the interface is loopback up. ·       down(l)—Indicates that the protocol state of the interface is loopback down.
Protocol	Link layer protocol state of interface: ·       down—Indicates that the protocol state of the interface is down. ·       up—Indicates that the protocol state of the interface is up. ·       up(s)—Indicates that the protocol state of the interface is spoofing up.
IP Address	IP address of interface (If no IP address is configured, “--” is displayed.)
Description	Interface description information (If no IP address is configured, “--” is displayed), for which at most 27 characters can be displayed. If there are more than 27 characters, only the first 24 characters and “…” are displayed.

 

ip address

Syntax

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

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

View

Interface view

Default level

2: System level

Parameters

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

mask-length: Subnet mask length, the number of consecutive ones in the mask, in the range of 0 to 32.

mask: Subnet mask in dotted decimal notation.

sub: Secondary IP address for the interface.

Description

Use the ip address command to assign an IP address and mask to the interface.

Use the undo ip address command to remove all IP addresses.

Use the undo ip address ip-address { mask | mask-length } command to remove the primary IP address.

Use the undo ip address ip-address { mask | mask-length } sub command to remove a secondary IP address.

By default, no IP address is assigned to any interface.

When assigning IP addresses to an interface, consider the following:

·           You can assign only one primary IP address to an interface.

·           The primary and secondary IP addresses can be located on the same network segment.

·           Before removing the primary IP address, remove all secondary IP addresses.

·           You can assign a secondary IP address only when the interface is not configured to borrow an IP address through IP unnumbered or obtain one through PPP address negotiation.

Related commands: display ip interface.

Examples

Assign GigabitEthernet 3/1/1 a primary IP address and a secondary IP address, with the subnet masks both being 255.255.255.0.

<Sysname> system-view

[Sysname] interface GigabitEthernet 3/1/1

[Sysname-GigabitEthernet3/1/1] ip address 129.102.0.1 255.255.255.0

[Sysname-GigabitEthernet3/1/1] ip address 202.38.160.1 255.255.255.0 sub

ip address unnumbered

Syntax

ip address unnumbered interface interface-type interface-number

undo ip address unnumbered

View

Interface view

Default level

2: System level

Parameters

interface interface-type interface-number: Specifies an interface from which the current interface can borrow an IP address.

Description

Use the ip address unnumbered command to configure the current interface as IP unnumbered to borrow an IP address from another interface.

Use the undo ip address unnumbered command to disable IP unnumbered on the interface.

By default, the interface does not borrow IP addresses from other interfaces.

Examples

# Configure the interface Serial 3/1/9/1:23 supporting PPP-encapsulation to borrow the IP address of the interface GigabitEthernet 3/1/1.

<Sysname> system-view

[Sysname] interface serial 3/1/9/1:23

[Sysname-Serial3/1/9/1:23] ip address unnumbered interface GigabitEthernet 3/1/1