Tuesday , March 19 2024

Huawei certification once again

There is a new Huawei website that describes clearly Huawei certification track. Maybe some of you have already found it. For those, who are still looking for such information I am giving a direct link to official Huawei certification track.

I think this is useful news for those, who are interested in passing Huawei certification exams. It was not easy to find such information a few months ago.

It seems that Huawei started to treat its certification seriously.

Read More »

OSPF virtual link

OSPF virtual link is a tunnel that extends backbone area through a non-backbone area. It is interpreted by the router as unnumbered point-to-point network. Virtual links must be configured between two Area Border Routers. These ABRs are considered neighbours, by establishing the virtual link between them, although they are not linked physically. The transit area (the area through which the virtual link is configured) must have full routing information and cannot be a stub area.

Virtual links add complexity to a network and should be avoided. Use them only as a temporary fix to OSPF topology problem.

Virtual links are used for the following purposes:

  • To link an area to the backbone area through a non-backbone area (most common case). On the picture below Area2 was connected to the Area0 via virtual link, which extends Area0 through transit Area1.

Read More »

Huawei eNSP – news

A new version of Huawei Enterprise Network Simulator eNSP was launched few days ago.

What new can we find?

  • Added FTP, HTTP and DNS client and server terminals;
  • Added a function supporting IPv6 to simulate PC.

Besides, a few bugs have been solved.

All details you can find at Huawei Support.

Read More »

GRE on Huawei routers

Generic Routing Encapsulation (GRE) is introduced to encapsulate packets. Then these packets can be transmitted over an IPv4 network. GRE provides a mechanism to encapsulate packets of one protocol into packets of another protocol. This allows packets to be transmitted over heterogeneous networks. GRE also provides tunnels to transparently transmit VPN packets. When a device receives a packet that needs to be encapsulated and routed, it adds a GRE header to the packet and encapsulates it into another protocol such as IP. The packet is then forwarded by the IP protocol.

Let’s try to configure GRE tunnel between labnario_1 and labnario_3. All packets sent from PC_1 to PC_2, and vice versa, will be transmitted through the GRE tunnel.

Assure communication between routers in the network. It is omitted here.

Read More »