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How To

how to check the default configuration of switch’s interface

When taking into consideration that default settings are invisible in a configuration file, it is a good information that Huawei’s S3700/S5700 switches have such possibility to display default settings for ethernet interfaces. The ‘display this include-default’ command displays the effective configurations in the current view, including the unchanged default configurations.

[labnario-Ethernet0/0/1]display this include-default 
interface Ethernet0/0/1
 undo shutdown
 enable snmp trap updown
 undo set flow-stat interval
 undo qinq vlan-translation enable
 undo mac-address learning disable
 port priority 0
 port link-type hybrid
 port hybrid pvid vlan 1
 port hybrid untagged vlan 1
 qinq protocol 8100
 undo loopback-detect enable
 stp enable
 undo stp config-digest-snoop
 undo stp no-agreement-check
 undo stp root-protection
 undo stp loop-protection
 stp transmit-limit 147
 stp point-to-point auto
 stp compliance auto

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how to configure multiple interfaces at the same time

This is an useful feature, specially if we want to configure Huawei’s switch, where there are lots of physical interfaces. Very often, some of interfaces have the same configuration. Instead of configure the interfaces one by one it is easier to configure multiple interfaces at the same time. It improves the efficiency.

Let’s assume that you want to add 5 GE interfaces to VLAN 100:

[labnario]port-group labnario
[labnario-port-group-labnario]group-member GigabitEthernet 0/0/1 to GigabitEthernet 0/0/5
[labnario-port-group-labnario]port link-type access
[labnario-port-group-labnario]port default vlan 100

[labnario]dis cur | beg port-group
port-group labnario
 group-member GigabitEthernet0/0/1
 group-member GigabitEthernet0/0/2
 group-member GigabitEthernet0/0/3
 group-member GigabitEthernet0/0/4
 group-member GigabitEthernet0/0/5

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how to delete a telnet user

Sometimes we can meet such situation on a router or a switch:

 [labnario]display users
  User-Intf    Delay    Type   Network Address     AuthenStatus    AuthorcmdFlag
+ 34  VTY 0   00:00:00  TEL             pass           no      Username : huawei
  35  VTY 1   00:08:01  TEL             pass           no      Username : labnario
  36  VTY 2   00:07:38  TEL             pass           no      Username : killer
  37  VTY 3   00:07:00  TEL             pass           no      Username : killer
  38  VTY 4   00:01:34  TEL             pass           no      Username : labnario

By default, on Huawei device, there are 5 vty lines available. If all these lines are occupied by users, no other user is able to access the device. Such situation can appear in 2 cases:

  1. The device is fully occupied by telnet users.
  2. All telnet sessions are hang.

The first case is normal and it can often happen. Sessions will be deleted when users log out from the device or their sessions’ idle-timeout expires. By default idle-timeout is set to 10 minutes.

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screen length of terminal

24 – the default number of lines on one screen

<NE40E> display current-configuration
 sysname NE40E
 super password level 1 simple huawei1
 super password level 3 simple huawei
 super password level 15 simple labnario
 FTP server enable
 FTP acl 2000
 info-center source BFD channel 1 log level informational
 info-center loghost source GigabitEthernet0/0/0
 info-center loghost facility local4
 vlan batch 31 to 32 98 100
 hotkey CTRL_U "display ip interface brief"
 undo cluster enable
snmp-agent trap type base-trap
 load-balance ip-enhance all
  ---- More ----

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disabling Huawei S3300 notification record

In this post I will show you how to disable a notification record which appears always after you type a configuration command. This notification causes your frustration when you want to configure anything on this switch and suddenly you see the following record:

[labnario]interface GigabitEthernet 0/0/1
Jan  1 2008 00:24:47+01:00 labnario DS/4/DATASYNC_CFGCHANGE:OID configurations have been changed. The current change number is 24, the change loop count is 0, and the maximum number of records is 4095.

You have such situation on Huawei S2300, S3300 and S5300 switches if you are logged by the console.

How to cope with it?

You have two ways to do this. The first is to disable it temporarily by the following commands:

<labnario>undo terminal monitor


<labnario>undo terminal trapping

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