AR Router Maintenance Guide-FAQ(Device Management)

AR series routers allow multiple ports to mirror traffic to one observing port. There is no limit to the number of ports. The traffic mirrored to the observing port, however, cannot exceed the maximum forwarding traffic of the observing port, namely, maximum bandwidth of the observing port.

Yes.

An interface cannot be configured as a mirroring port and an observing port at the same time. This is because the mirroring port and the observing port are exclusive.

Yes. Run the capture-packet command to configure the packet capturing function. The packets captured can be displayed directly on a terminal or be stored in the storage media of the device.

The log files are saved when a storage device such as a Flash memory, a USB flash drive or an SD card is available.

In the user view, run the save logfile command to save log files.

By default, the log files of AR1200 series routers are stored on the USB flash drive, and the log files of AR2200, AR3600, and AR3200 are stored on the SD card. If USB flash drive or SD card is unavailable, log files cannot be stored.

NOTE:

From V200R005C10, the log files of AR1200 series are saved in the flash memory by default.

The AR3600 series routers are released from V200R006C10.

Run the info-center logfile path command to configure the path where log files are stored.

• Run the display logbuffer command to view log information in the log buffer.

• Run the display logfile command to view log information in the log files.

The AR series routers support only the FAT32 file system for USB flash drives and SD cards.

You do not need to use different system software versions to match different SRUs. The same system software is used on no matter which type of SRU is installed. This is true for AR3200.

A space in an ESN of an AR router is an invalid character.

By default, only warning logs are displayed in the log buffer. Command line operation logs are at the notifications level, which is lower than warning. Therefore, command line operation logs will not be displayed in the log buffer.

To view command line operation logs in the log buffer, perform the following operations:

1. Run the system-view command to enter the system view.
2. Run the info-center source default channel logbuffer log level notifications command to allow logs of the notifications level to be displayed in the log buffer.

SNMP provides the trap function to control the output of trap messages. An AR router generates trap messages only when the trap function has been enabled on the AR router.

Perform the following operations to enable the trap function on an AR router:

1. Run the system-view command to enter the system view.
2. Run the snmp-agent trap enable command to enable the AR router to send trap messages to the NMS.
3. Run the snmp-agent target-host trap-paramsname paramsname v1 securityname securityname [ binding-private-value ] [ trap-filterprofilename filterprofilename ] [ private-netmanager ] command to set parameters for sending trap messages.
   NOTE:

   • V200R001C01 and later versions support binding-private-value.
   • V200R002C00 and later versions support private-netmanager.
4. Run the snmp-agent target-host trap-hostname hostname address ipv4-addr [ udp-port udp-portid ] [ public-net | vpn-instance vpn-instance-name ] trap-paramsname paramsname command to specify the destination host for receiving trap messages and error codes.
   NOTE:

   The default destination UDP port number is 162. To ensure secure communication between the NMS and managed devices, run the udp-port command to change the UDP port number to a non-well-known port number.

Run the display version command in any view. The message "LPU X: uptime is X week, X day, X hour, X minutes" is displayed next to each board version information list. This message indicates the running duration of the board. For example, if "LPU 2 : uptime is 0 week, 0 day, 6 hours, 1 minute" is displayed, LPU 2 has been running for 6 hours and 1 minutes after registration.

Run the display workmode command in any view to view the board working mode of a specified slot or all slots.

The PoE output voltage is 48 V. The standard PD converts 48 V voltage into its voltage, and a non-standard PD must connect to a PoE splitter to convert 48 V voltage into its voltage.

Before using a USB flash drive to configure the router, check whether the index file of the USB flash drive exists. You can edit the index file to perform deployment.

In versions earlier than V200R005C00, the format of the index file for USB-based deployment is as follows:

BEGIN AR
[USB CONFIG]
SN=
EMS_ONLINE_STATE=
[UPGRADE INFO]
OPTION=
AUTOFLAG=
PASSWORD=
DEVICENUM=
[DEVICEn DESCRIPTION]
OPTION=
ESN=
MAC=
VERSION=
DIRECTORY=
FILENUM=
TYPEn=
FILENAMEn=
END AR

In V200R005C00 and later versions, the format of the index file for USB-based deployment is as follows:

BEGIN AR
[USB CONFIG]
SN=
EMS_ONLINE_STATE=
[UPGRADE INFO]
OPTION=
DEVICENUM=
[DEVICEn DESCRIPTION]
OPTION=
ESN=
MAC=
VERSION=
DIRECTORY=
FILENUM=
TYPEn=
FILENAMEn=
HMACn=
END AR

No, the AR does not support periodical transmission of logs to the log host. However, the AR can send logs to the log host.

Yes, several AR routers can send logs to the same log host.

Yes, a PC running the Windows operating system can be used as a log host only when it has third-party software installed such as Kiwi Syslog Daemon.

NOTE:

Some personal communication information may be collected or stored to detect transmission faults and errors. Huawei cannot collect or store user communication information without permission. It is recommended that relevant functions used to collect or store user communication information be enabled under applicable laws and regulations. During user communication information collection and storage, measures must be taken to protect user communication information.

The device supports the following two types of mirroring functions:

• Port mirroring

  A packet passing through a mirrored interface is copied and then sent to a specified monitoring device for analysis and monitoring. All packets passing through the mirrored interface are copied.

• Flow mirroring

  A packet passing through a mirrored interface and matching a traffic classification rule is copied and then sent to a specified monitoring device for analysis and monitoring. A traffic policy matching flow mirroring is applied to the mirroring interface, and packets matching traffic classification rules on the mirrored interface are copied.

NOTE:

The device does not provide packet parsing, and packet capture software is required to parse packets.

The Electronic Serial Number (ESN) of the device is unique. The ESN of the device is required when you request a license. You can run the display esn command to view the ESN of the device.

Run the undo info-center enable command in the system view to disable the information center. After the undo info-center enable command is executed, logs including logs generated by the undo info-center enable command, traps, and debugging messages are not recorded.

After the device restarts, there is a low probability that the DHCP configuration is lost.

Auto-Config is enabled by default. About two and a half minutes after the device restarts, the Auto-Config module checks whether the configuration file exists and determine whether the Auto-Config process is executed. If the save command is used at this time, files conflict. As a result, the Auto-Config module determines that the configuration file does not exist, and incorrectly executes the Auto-Config process. In this case, information about option fields or intermediate file required for executing the Auto-Config process is not configured on the DHCP server. Consequently, the Auto-Config process is suspended, and the DHCP configuration (including the configuration during configuration recovery and the Auto-Config process) is deleted.

After the device restarts, run the undo autoconfig enable command in the system view to disable Auto-Config.

Starting from V200R002C00, observe-port-index is deleted from observe-port [ observe-port-index ] interface interface-type interface-number and port-mirroring to observe-port observe-port-index { both | inbound | outbound }.