AR Router Maintenance Guide-Routine Maintenance

Created: Aug 30, 2017 14:38:03Latest reply: Aug 30, 2017 14:45:34 899 1 0 0

 

3  Routine Maintenance

This document describes routine maintenance operations on the AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600.

3.1  Introduction to the Routine Maintenance

Stable operating of devices depends on a proper network plan and routine maintenance. The purpose of routine maintenance is to discover and eliminate potential threats to device operating. This document provides suggestions on routine maintenance of the AR100&AR120&AR150&AR160&AR200&AR1200&AR2200&AR3200&AR3600.

3.2  Checking the Running Conditions

A router can work properly only after the following conditions are met.

No.

Check Item

Criteria and Remarks

Result

1

Position of the router

The router should be placed steadily in a flat position in a ventilated and dry environment, and be kept away from sunlight and heating devices. No sundries exist around the router.

□ Satisfied

□ Unsatisfied

□ Not involved

2

Ambient temperature in the equipment room

The ambient temperature in the equipment room should range from 0°C to 40°C.

□ Satisfied

□ Unsatisfied

□ Not involved

3

Ambient humidity

The ambient humidity in the equipment room should range from 5% RH to 90% RH.

□ Satisfied

□ Unsatisfied

□ Not involved

4

Air conditioner in the equipment room

The air conditioner keeps running steadily so that the temperature and humidity in the equipment room is within an acceptable range.

□ Satisfied

□ Unsatisfied

□ Not involved

5

Cleaning

  • If the air filter is covered by dust, clean or replace it in time; otherwise, the heat dissipation in the chassis is affected.
  • No obvious dust exists.
  • Effective rodent-proof measures are taken to keep small animals such as cockroaches outside.

□ Satisfied

□ Unsatisfied

□ Not involved

6

Grounding and the grounding resistance

  • The working grounding, protection grounding, and lightning protection grounding should be deployed separately in the equipment room. Joint grounding can be used if the equipment room is under limited conditions.
  • When the ground cable is connected to the ground bar, the grounding resistance is less than 5 ohms.
  • When the ground cable is connected to the grounding electrode, the grounding resistance is less than 10 ohms.
  • If devices cannot be grounded, connect ground cables to ensure the same voltage among devices.

□ Satisfied

□ Unsatisfied

□ Not involved

7

Connection to power supply

The power cable should be correctly and fixedly connected to the specified position of the switch. The power supply indicator on the switch should be always on (green).

Check whether the power outlet is reliable and passes China Compulsory Certification (CCC).

□ Satisfied

□ Unsatisfied

□ Not involved

8

Power supply system

The power supply system should run stably. The DC voltage should range from -48 V DC to -60 V DC. The AC voltage should range from 100 V AC to 240 V AC.

□ Satisfied

□ Unsatisfied

□ Not involved

9

Acid and alkali status

No metal, PCB, or connector is corroded or rusty.

□ Satisfied

□ Unsatisfied

□ Not involved

10

Lightning protection status

  • No serial cable is routed in outdoor areas.
  • No Ethernet cable is routed in outdoor areas.

□ Satisfied

□ Unsatisfied

□ Not involved

11

Installation specifications compliance

  • Filler panels are installed in slots without interface cards. Screws used to secure interface cards, filler panels, and cables are tightened.
  • Insulation layers of cables are kept away from high-temperature objects.
  • Cables are neatly sorted and bound to prevent incorrect installation and removal. Power cables and signal cables cannot be bound together.
  • Protective plugs are installed on unused optical interfaces.

□ Satisfied

□ Unsatisfied

□ Not involved

3.3  Checking the Basic Device Information

The basic device information includes software version, patch information, and system time.

eb8c7ab889154a0d8bb18edaf039e5ec NOTE:

The following check methods apply to all views, unless otherwise specified.

No.

Check Item

Command

Criteria

Result

1

Software version

Run the display version command.

The PCB versions and software version are correct.

□ Satisfied

□ Unsatisfied

□ Not involved

2

Software package

Run the display startup command.

Check whether the following system software names are correct:
  • Current startup system software name
  • Next startup system software name
  • Backup system software name
  • Current startup system software names and next startup system software names for configuration, license, patch, and license files

□ Satisfied

□ Unsatisfied

□ Not involved

3

License information

  • Run the display license command.

  • Run the display license state command.

  • The name and version of the GTL license meet the requirements.

  • The state of the "Master board license state" should be "Normal". When the state of the "Master board license state" is "Demo" or "Trial", you should check whether the license is valid.

□ Satisfied

□ Unsatisfied

□ Not involved

4

Patch information

Run the display patch-information command.

  • The installed patches meet the requirements. The latest patch matching the product is recommended.

  • The patches are in running state.

□ Satisfied

□ Unsatisfied

□ Not involved

5

System time

Run the display clock command.

  • The system time is the same as the local time (time difference is within 5 minutes). The correct system time makes fault locating accurate.
  • If the criteria is not met, run the clock datetime command in the user view to change the system time.

□ Satisfied

□ Unsatisfied

□ Not involved

6

Flash memory

Run the dir flash: command in the user view.

All the files in the flash memory should be useful; otherwise, run the delete /unreserved command in the user view to delete unnecessary files.

□ Satisfied

□ Unsatisfied

□ Not involved

7

SD Card memory

Run the dir sd0: command or the dir sd1: command in the user view.

All the files in the SD card memory should be useful; otherwise, run the delete /unreserved command in the user view to delete unnecessary files.

□ Satisfied

□ Unsatisfied

□ Not involved

8

Information center

Run the display info-center command.

The status of the "Information Center" is "enabled".

□ Satisfied

□ Unsatisfied

□ Not involved

9

Configurations

Run the display current-configuration command.

The current parameter settings on the switch are correct.

□ Satisfied

□ Unsatisfied

□ Not involved

10

Debugging

Run the display debugging command.

All the debugging functions are disabled when the switch runs properly.

□ Satisfied

□ Unsatisfied

□ Not involved

11

Saved configurations

Run the compare configuration command in the user view.

All the service configurations are saved. The configurations in use are the same as the saved configurations.

□ Satisfied

□ Unsatisfied

□ Not involved

12

Network connectivity

  • Run the ping command.
  • Run the tracert command.

The devices properly communicate with each other.

□ Satisfied

□ Unsatisfied

□ Not involved

3.4  Checking the Device Running Status

A router's running status includes board running status, resetting information, and device temperature.

eb8c7ab889154a0d8bb18edaf039e5ec NOTE:

The following check methods apply to all views, unless otherwise specified.

No.

Check Item

Command

Criteria

Result

1

Boards running status

Run the display device command.

The boards are in service and the running status is normal.
  • The value of "Online" should be "Present."

  • The value of "Power" should be "PowerOn."

  • The value of "Register" should be "Registered."

  • The value of "Alarm" should be "Normal."

□ Satisfied

□ Unsatisfied

□ Not involved

2

Resetting

Run the display reset-reason command in the diagnosis view.

The resetting information, including resetting time and service type, shows that no abnormal resetting occurs.

□ Satisfied

□ Unsatisfied

□ Not involved

3

Device temperature

Run the display temperature all command.

The temperature of each module is between the upper limit and lower limit. That is, the value of "Temperature" is between "Upper" and "Lower".

□ Satisfied

□ Unsatisfied

□ Not involved

4

Fan status

Run the display fan command.

In the command output, the Present field displays YES.

□ Satisfied

□ Unsatisfied

□ Not involved

5

Power supply status

Run the display power command.

In the command output, the State field displays Supply.

□ Satisfied

□ Unsatisfied

□ Not involved

6

FTP port

Run the display ftp-server command.

The FTP port not in use is shut down.

□ Satisfied

□ Unsatisfied

□ Not involved

7

Alarms

Run the display alarm active command.

  • No alarm is generated.

  • If an alarm is generated, record it. If a major alarm or more serious alarm is generated, analyze and process it immediately.

□ Satisfied

□ Unsatisfied

□ Not involved

8

CPU usage

Run the display cpu-usage command.

The CPU usage of each module is normal. If the CPU usage exceeds 80%, find out the reason.

□ Satisfied

□ Unsatisfied

□ Not involved

9

Memory usage

Run the display memory-usage command.

The memory usage is normal. If the value of "Memory Using Percentage Is" exceeds 60%, find out the reason.

□ Satisfied

□ Unsatisfied

□ Not involved

10

Logs

  • Run the display logbuffer command.

  • Run the display trapbuffer command.

No abnormal information is displayed.

□ Satisfied

□ Unsatisfied

□ Not involved

3.5  Checking the Interface Information

The interface information includes the negotiation mode, configurations, and status of the interface.

eb8c7ab889154a0d8bb18edaf039e5ec NOTE:

The following check methods apply to all views, unless otherwise specified.

No.

Check Item

Command

Criteria

Result

1

Errored packet

Run the display interface command

No errored packets, including the CRC errored packets, exist on the interface during service running.

□ Satisfied

□ Unsatisfied

□ Not involved

2

Interface configurations

Run the display interface command

The interface configurations, such as the negotiation mode, rate, isolation, and rate limit, are proper.

□ Satisfied

□ Unsatisfied

□ Not involved

3

Interface status

Run the display interface brief command

The Up/Down status of the interface meets the requirements.

□ Satisfied

□ Unsatisfied

□ Not involved

4

PoE power supply

NOTE:

Only AR151W-P, AR161FW-P-M5, AR169-P-M9, AR169W-P-M9, AR169RW-P-M9, AR201VW-P, AR207V-P, AR1220W, AR1220EV, AR1220EVW, AR1220V, AR2204-48GE-P, AR2204-51GE-P, AR2204-27GE-P, and AR1220VW support the PoE function.

Run the display poe power-state interface interface-type interface-number command

The PoE power supply is normal. The value of "Port power ON/OFF" is "ON", and the value of "Port power status" is "Delivering-power".

□ Satisfied

□ Unsatisfied

□ Not involved

3.6  Checking Services

All the services on the router must run normally.

eb8c7ab889154a0d8bb18edaf039e5ec NOTE:

The following check methods apply to all views, unless otherwise specified.

No.

Check Item

Command

Criteria

Result

Multicast

Information about multicast member interfaces and router interfaces

Run the display igmp-snooping port-info command.

Information about static member interfaces, dynamic member interfaces, static router interfaces, and dynamic router interfaces is correct.

□ Satisfied

□ Unsatisfied

□ Not involved

Multicast packet statistics

Run the display igmp-snooping statistics vlan command.

The number of IGMP messages sent by a vlan is correct, the number of IGMP messages and PIM Hello messages received by a VLAN is correct, and the number of Layer 2 events in all the VLANs is correct.

□ Satisfied

□ Unsatisfied

□ Not involved

Multicast forwarding table

  • Run the display l2-multicast forwarding-table vlan vlanid command to view the Layer 2 multicast forwarding table.

  • Run the display multicast forwarding-table command to view the Layer 3 multicast forwarding table.

The multicast forwarding entries are correct.

□ Satisfied

□ Unsatisfied

□ Not involved

Multicast routing protocol

Run the display multicast routing-table command.

  • The intra-domain multicast routing protocol should be PIM-SM.

  • All the multicast interfaces should be enabled with IGMP.

□ Satisfied

□ Unsatisfied

□ Not involved

IP Service

IP traffic statistics

Run the display ip statistics command and collect the data.

After five seconds, run the command again. Then collect the data and compare the data.
  • Both the number of error packets and the number of TTL expired packets in a single collection should be smaller than 100.
  • Normally, the number of error packets and the number of TTL expired packets should remain the same in the second collection.

□ Satisfied

□ Unsatisfied

□ Not involved

ICMP traffic statistics

Run the display icmp statistics command.

Both the value of "destination unreachable" and the value of "redirects" are not more than 100.

□ Satisfied

□ Unsatisfied

□ Not involved

IP address pool

Run the display ip pool command.

The value of "Conflict" is 0.

□ Satisfied

□ Unsatisfied

□ Not involved

NAT ALG Status

Run the display nat alg command.

Check whether the status of "dns","ftp","rtsp", and "sip" is correct.

□ Satisfied

□ Unsatisfied

□ Not involved

NAT Server Configuration

Run the display nat server command.

Check whether "Global IP/Port" and "Inside IP/Port" are configured correctly.

□ Satisfied

□ Unsatisfied

□ Not involved

NAT session table

Run display nat session all verbose command.

Check whether "New SrcAddr", "New SrcPort", "New DestAddr", and "New DestPort" are correct after NAT translation.

□ Satisfied

□ Unsatisfied

□ Not involved

WAN

PPP protocol status

Run the display interface serial command.

When the"current state" is "UP", the "Line protocol current state" must be "UP".

□ Satisfied

□ Unsatisfied

□ Not involved

FR protocol status

Run the display interface mfr command.

When the "current state" is Up, the "Line protocol current state" must be Up.

□ Satisfied

□ Unsatisfied

□ Not involved

MP binding

Run the display ppp mp command.

The number of bound links is correct.

□ Satisfied

□ Unsatisfied

□ Not involved

3G

Call session

Run display cellular interface number all command.

  • The "Current Service Status" is displayed as "Service available".
  • The "Packet Session Status" is displayed as "Active".

□ Satisfied

□ Unsatisfied

□ Not involved

Reliability

Backup interface status

Run the display interface brief command.

The physical status of the backup interface is "^ down".

□ Satisfied

□ Unsatisfied

□ Not involved

VRRP status

  • Run the display vrrp command.

  • Run the display vrrp statistics command.

  • The value of "State" should not be "Initialize."

  • The VRRP status of the backup node in the VRRP group cannot be "Master."

  • The values of "Checksum errors", "Version errors," and "Vrid errors" should be 0.

□ Satisfied

□ Unsatisfied

□ Not involved

BFD session status

  • Run display bfd session all verbose command.

  • Run the display bfd statistics command.

The status of all BFD sessions is Up.

□ Satisfied

□ Unsatisfied

□ Not involved

MSTP

MSTP status

Run the display stp brief command.

  • The "STP State"of the specified port and the root port should be "FORWARDING".
  • The "STP State" of the backup root port should be "DISCARDING".

□ Satisfied

□ Unsatisfied

□ Not involved

MST region

Run the display stp region-configuration command.

The name, revision level, VLAN-MSTI mappings, and digest of the MST region should meet the requirements.

□ Satisfied

□ Unsatisfied

□ Not involved

MSTP topology changes

Run the display stp topology-change command.

  • Display statistics about MSTP topology changes.

  • If the number of topology changes keeps increasing, network flapping occurs.

□ Satisfied

□ Unsatisfied

□ Not involved

Number of TC/TCN BPDUs

Run the display stp tc-bpdu statistics command and collect the data.

After five minutes, run the command again. Then collect the data and compare the data.

Normally, the number in the second collection does not increase or increase a little.

□ Satisfied

□ Unsatisfied

□ Not involved

Routing information

Routing table information

Run the display ip routing-table command.

  • A default route or precise route exists for remote fault locating.
  • On all the devices running the same routing protocol at the same layer of a network, the number of routing entries should be almost identical. If static routes are configured, the routing entries in the routing tables of different devices may differ.

□ Satisfied

□ Unsatisfied

□ Not involved

OSPF errored packets

Run the display ospf error command. After five minutes, run the command again. Then collect data twice and compare the data.

  • In the normal situation, the collected data does not increase.

□ Satisfied

□ Unsatisfied

□ Not involved

OSPF neighbor status

IS-IS neighbor status

BGP peer status

Run the display ospf peer command.

Run the display ospf peer last-nbr-down command.

Run the display isis peer command.

Run the display bgp peer command.

OSPF neighbor status

  • The value of "State" should be "Full."

  • The neighbor relationship should be retained for at least one day.

  • Normally, no neighbor is in Down state.

IS-IS neighbor status

  • The value of "State" should be "Up."

BGP peer status
  • The value of "State" should be "Established."

□ Satisfied

□ Unsatisfied

□ Not involved

OSPF Router ID

Run the display current-configuration configuration ospf command.

  • The router ID should be the address of the Loopback interface.

  • If no address is assigned to the Loopback interface, you must specify the router ID as the address of an uplink interface or the interface with minimum probability of being Down.

□ Satisfied

□ Unsatisfied

□ Not involved

Importing OSPF routes

Run the display current-configuration configuration ospf command.

You are advertised to import routes in Network mode. You can also import routes in Import mode.

□ Satisfied

□ Unsatisfied

□ Not involved

OSPF virtual link

Run the display ospf vlink command.

The value of the neighbor status "State" should be "Full."

□ Satisfied

□ Unsatisfied

□ Not involved

OSPF STUB area

Run the display current-configuration configuration ospf command.

You cannot import routes in Import mode in a stub area.

□ Satisfied

□ Unsatisfied

□ Not involved

Advertising BGP routes

Run the display current-configuration configuration bgp command.

  • You are not advised to run the import-route protocol command to advertise IP routes.

  • Run the network { ipv4-address | ipv6-address prefix-length and ip route-static ip-address { mask | mask-length } null0 commands to aggregate routes manually, and then advertise the routes.

□ Satisfied

□ Unsatisfied

□ Not involved

IBGP peers

Run the display current-configuration configuration bgp command.

  • To keep the protocol stability, you are advised to set up peer relationship by using Loopback interfaces, which are always Up.

□ Satisfied

□ Unsatisfied

□ Not involved

L3VPN

VPN routes

Run the display ip routing-table vpn-instance vpn-instance-name command.

Check whether routes destined for the peer CE exist.

□Satisfied

□Unsatisfied

□Not involved

Routing attribute sent or received by a VPN instance

Run the display ip vpn-instance verbose command.

Export VPN Targets and Import VPN Targets should be configured correctly.

□Satisfied

□Unsatisfied

□Not involved

WLAN

AP

Run the display ap command.

"State" is displayed as "Normal".

□Satisfied

□Unsatisfied

□Not involved

From group: Router
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WoodWood     Created Aug 30, 2017 14:45:34 Helpful(1) Helpful(1)

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