R2511-HP MSR Router Series Interface Command Reference(V5)
Table Of Contents
- Title Page
- Contents
- Ethernet interface configuration commands
- bandwidth
- combo enable
- default
- description
- display interface
- duplex
- flow-control
- flow-interval
- interface
- link-delay
- loopback
- port link-mode
- port link-mode interface-list
- reset counters interface
- shutdown
- speed
- broadcast-suppression
- display loopback-detection
- display counters
- display counters rate
- display port-group manual
- flow-interval
- group-member
- jumboframe enable
- loopback-detection control enable
- loopback-detection interval-time
- loopback-detection per-vlan enable
- mdi
- multicast-suppression
- port-group manual
- unicast-suppression
- virtual-cable-test
- mac-address
- mac-address valid-check
- mtu
- promiscuous
- qmtoken
- WAN interface configuration commands
- bandwidth
- default
- description
- link-delay
- shutdown
- async mode
- baudrate
- clock
- code
- country-code
- crc
- detect
- display interface analogmodem
- display interface aux
- display interface serial
- eliminate-pulse
- idle-mark
- invert receive-clock
- invert transmit-clock
- itf
- loopback
- looptest
- mtu
- physical-mode
- phy-mru
- reset counters interface
- reset counters interface
- reset counters interface
- reverse-rts
- timer hold
- virtualbaudrate
- autodeploy sms enable
- display cellular
- display cellular-ethernet
- display gps
- display interface cellular
- display interface cellular-ethernet
- display sms
- display sms statistics
- dm-port open
- gps mode
- gps nmea
- ip address cellular-allocated
- lte band
- mode cdma
- mode wcdma
- modem auto-recovery enable
- modem reboot
- modem response
- pin modify
- pin unlock
- pin verification
- pin verify
- plmn search
- plmn select
- profile create
- profile main
- recovery track
- reset counters interface cellular
- reset counters interface cellular-ethernet
- rssi
- sms delete
- sms forward
- sms send
- sms sending-enable
- snmp-agent trap enable sms
- standby rssi
- trust-imsi
- alarm
- cable (CE1/PRI interface)
- channel-set (CE1/PRI interface)
- clock (CE1/PRI interface)
- clock-change auto
- code (CE1/PRI interface)
- controller e1
- crc
- data-coding (CE1/PRI interface)
- detect-ais
- display controller e1
- error-diffusion restraint config
- error-diffusion restraint enable
- error-diffusion restraint restart-channel
- frame-format (CE1/PRI interface)
- idlecode (CE1/PRI interface)
- itf (CE1/PRI interface)
- loopback (CE1/PRI interface)
- looptest (CE1/PRI interface)
- pri-set (CE1/PRI interface)
- reset counters controller e1
- using (CE1/PRI interface)
- alarm (CT1/PRI interface)
- alarm-threshold
- bert (CT1/PRI interface)
- cable (CT1/PRI interface)
- channel-set (CT1/PRI interface)
- clock (CT1/PRI interface)
- code (CT1/PRI interface)
- controller t1
- crc
- data-coding (CT1/PRI interface)
- display controller t1
- error-diffusion restraint config
- error-diffusion restraint enable
- error-diffusion restraint restart-channel
- fdl
- frame-format (CT1/PRI interface)
- idlecode (CT1/PRI interface)
- itf (CT1/PRI interface)
- loopback (CT1/PRI interface)
- looptest (CT1/PRI interface)
- pri-set (CT1/PRI interface)
- reset counters controller t1
- sendloopcode
- clock-change auto
- crc
- display fe1
- fe1 alarm
- fe1 cable
- fe1 clock
- fe1 code
- fe1 data-coding
- fe1 frame-format
- fe1 idlecode
- fe1 itf
- fe1 loopback
- fe1 timeslot-list
- fe1 unframed
- crc
- display ft1
- ft1 alarm
- ft1 alarm-threshold
- ft1 bert
- ft1 cable
- ft1 clock
- ft1 code
- ft1 data-coding
- ft1 fdl
- ft1 frame-format
- ft1 idlecode
- ft1 itf
- ft1 loopback
- ft1 sendloopcode
- ft1 timeslot-list
- bert (CE3 interface)
- clock (CE3 interface)
- controller e3
- crc
- display controller e3
- e1 bert
- e1 channel-set
- e1 set clock
- e1 set frame-format
- e1 set loopback
- e1 shutdown
- e1 unframed
- fe3
- loopback (CE3 interface)
- national-bit
- reset counters controller e3
- using (CE3 interface)
- alarm (CT3 interface)
- bert (CT3 interface)
- cable (CT3 interface)
- clock (CT3 interface)
- controller t3
- crc
- display controller t3
- feac
- frame-format (CT3 interface)
- ft3
- loopback (CT3 interface)
- mdl (CT3 interface)
- reset counters controller t3
- t1 alarm
- t1 bert
- t1 channel-set
- t1 sendloopcode
- t1 set clock
- t1 set fdl
- t1 set frame-format
- t1 set loopback
- t1 show
- t1 shutdown
- t1 unframed
- using (CT3 interface)
- display interface bri
- loopback (ISDN BRI interface)
- mtu (ISDN BRI interface)
- reset counters interface
- ATM and DSL interface configuration commands
- bandwidth
- default
- description
- display interface atm
- interface atm
- reset atm interface
- reset counters interface
- shutdown
- cable (ATM E1 interface)
- cable (ATM T1 interface)
- clock
- clock-change auto
- code
- differential-delay
- display interface ima-group
- frame-format
- frame-length
- ima ima-group
- ima-clock
- ima-standard
- ima-test
- interface ima-group
- loopback
- min-active-links
- scramble
- cable
- clock
- frame-format
- loopback
- scramble
- clock
- flag
- frame-format
- loopback
- scramble
- activate
- adsl standard
- adsl tx-attenuation
- bootrom update file
- display dsl configuration
- display dsl status
- display dsl version
- activate
- display dsl configuration
- display dsl status
- display dsl version
- shdsl annex
- shdsl capability
- shdsl line-probing
- shdsl mode
- shdsl pam
- shdsl pbo
- shdsl psd
- shdsl rate
- shdsl snr-margin
- shdsl wire
- interface efm
- POS interface configuration commands
- CPOS interface configuration commands
- bandwidth
- clock
- controller cpos
- default
- description
- display controller cpos
- display controller cpos e1
- display controller cpos t1
- e1 channel-set
- e1 set clock
- e1 set flag
- e1 set frame-format
- e1 set loopback
- e1 shutdown
- e1 unframed
- flag
- frame-format
- loopback
- multiplex mode
- reset counters controller cpos
- shutdown
- t1 channel-set
- t1 set clock
- t1 set flag
- t1 set frame-format
- t1 set loopback
- t1 shutdown
- t1 unframed
- Loopback and null interface configuration commands
- Support and other resources
- Index

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Usage guidelines
CAUTION:
The default command might interrupt ongoing network services. Make sure you are fully aware of the
impacts of this command when you use it in a live network.
This command might fail to restore the default settings for some commands for reasons such as command
dependencies and system restrictions. Use the display this command in interface view to identify these
commands, and then use their undo forms or follow the command reference to individually restore their
default settings. If your restoration attempt still fails, follow the error message instructions to resolve the
problem.
Examples
# Restore the default settings of interface loopback 1.
<Sysname> system-view
[Sysname] interface loopback 1
[Sysname-loopback1] default
This command will restore the default settings. Continue? [Y/N]:y
description
Use description to change the text description for the current interface.
Use undo description to restore the default description.
Syntax
description text
undo description
Default
The description of a loopback or null interface is interface name Interface, for example, Loopback1
Interface.
Views
Loopback interface view, null interface view
Default command level
2: System level
Parameters
text: Interface description, a case-sensitive string of 1 to 240 characters. The description can include
letters, digits, special characters, spaces, and other Unicode characters and symbols.
When you specify an interface description, follow these guidelines:
• An interface description can be a mixture of English characters and other Unicode characters. The
mixed description cannot exceed the specified string length.
• To use Unicode characters or symbols in an interface description, install the corresponding IME and
log in to the device through remote login software that supports the character type.
• Each non-English Unicode character or symbol (non-English characters) takes the space of two
regular characters. When the length of a description string reaches or exceeds the maximum line
width on the terminal software, the software starts a new line. This might break a Unicode character
into two parts and create garbled characters at the end of a line.










