Labnario Huawei From Scratch

Network Time Protocol (NTP) is one of the oldest Internet protocols. It is used for clock synchronization between computer systems over packet-switched data networks.  Because it was designed to operate in variable-latency environment, NTP can achieve up to 1 millisecond accuracy in local area networks and tens of milliseconds when running over the Internet. NTP can be a very useful tool especially, when we want to correlate issues during network failures.

It is important to remember that NTP uses hierarchical system of levels of clock sources, which is called a stratum.

At the top of this hierarchy we have a stratum-0 devices, which act as a reference clocks. These are usually atomic clocks which has little or no delay associated with it. The reference clock typically synchronizes to the correct time (UTC) using GPS, Irig-B, etc.

Devices which are directly connected (usually via RS-232, not over a network path) to the stratum-0 servers are called stratum-1 servers. Stratum-2 server is connected to the stratum-1 server over a network path. Thus, a stratum-2 server gets its time via NTP protocol from a stratum-1 server. A stratum-3 server gets its time via NTP from stratum-2 server, and so on.

So the stratum level simply defines its distance from the reference clock.

How to configure NTP on Huawei devices?

Look at the lab topology:

Just to inform you.

A new version of eNSP has been released.

Besides some features have been modified, new devices have been added to Huawei Network Simulation Platform (eNSP):

• Frame Relay switch
• Cloud device
• Hub.

To enable system debugging functions on Huawei’s device:

<labnario>debugging ?
  acl4                    ACL4 module
  acl6                    ACL6 module
  anti-attack             Specify anti-attack configurations
  application-apperceive  Set application-apperceive information
  arp                     ARP module
  arp-ping                ARP-ping
  arp-proxy               Arp proxy debugging functions
  atm                     ATM module
  bfd                     BFD module
  bgp                     BGP protocol
  bridge                  Bridge
  ce-ping                 Enable ce-ping debugging
  cfm                     CFM module
  cluster                 Cluster module
  ...

<labnario>debugging ip icmp

To send debugging information to terminal:

<labnario>terminal monitor
Info: Current terminal monitor is on.
<labnario>terminal debugging
Info: Current terminal debugging is on.

To display which debugging functions are enabled:

<labnario>display debugging
IP icmp debugging is on

Simple Network Management Protocol (SNMP) is widely used for IP networks’ devices management and monitoring. Not only routers and switches can be managed using SNMP. It can be used with servers, modems, printers, etc. It is application layer protocol and is defined as IETF standard.

How SNMP works?

It operates based on the following components:

• Network Management Station (NMS), sends SNMP requests to query managed devices and receives alarms send by these devices. NMS uses the MIB to identify and manage device objects.
• Agent – process running on the managed device which is responsible for sending alarms to the NMS and processing requests received from NMS.
• Managed device – a networking device on which the Agent process is running.