On the top there are names of system components taking part in this procedure. Below you can see an example of the attach procedure. When UE (User Equipment) – sub- scriber’s device – is switched on, the attach procedure is enabled. Nokia, operating in the telecommunication industry – creates and develops LTE and 5G technology. The heartbeat messages are sent and confirmed (ACK) which means that these two devices – in this case System Module and MME – are connected. In Figure 5 you can see communication between two interfaces with the following IP addresses: 192.168.4.111 and 192.168.4.125. Usually, heartbeats messages are sent non-stop from the start-up until the shutdown. Links S1, X2 and link between System Module and Radio Module are physical, optical fibers wherein digital data is transferred.Ī heartbeat message in signal processing is a message sent from an originator to a destination that enables the destination to identify if, and when the originator fails, or is no longer available. System Module is connected with Radio Module via an optical link. System Module can also be connected to another System Module via X2 link. System Module is connected to MME (Mobility Management Entity) via S1 link, which is a part of EPC (Evolve Packet Core). In Figure 4 the basic base station model has been presented.
3.1 Wireshark in basic BTS connection investigation. In case of problems thorough analysis that should be performed in order to find the root cause – the reason, why specific functionality does not work. During testing the correctness of connections between specific components must be checked. In majority of Nokia appliances only low layers (1, 2, 3 and 4) are under investigation.
In Figure 3 you can see 3 filters used together: source, destination IP and protocol.
What is use of wireshark mac#
Following the 7 layer ISO/OSI model, it is possible to analyze each captured frame (which contains mac address) in Data Link layer, packets (which contains IP addresses) in Network layer, protocol details in Transport layer, etc…īesides simple filtering option Wireshark gives the possibility to combine filters. You can notice the detailed information about chosen packet. Most companies today have their own dedicated DNS servers to ensure the computers can find each other without problems. The Domain Name System (DNS) protocol is a ‘hierarchically distributed database’, which is a formal way of saying that its layers are arranged in a definite order, and that its data is distributed across a wide range of machines (just like the roots of a tree branch out from the main root). On the screen below the traffic has been filtered and only packets sent / received via DNS protocol are shown. Using a filter window, user can choose and analyze only packets that came from or go to a specific IP address or packets sent by the specific protocol. This dataflow capture provides basic information about data traffic on – in this case – WiFi interface, and what happens between the computer and the WiFi router user is connected to.Įxcept for its basic functionality of capturing, Wireshark can – as mentioned above –analyze packets thoroughly. Below, see a typical WiFi captured data stream. After choosing which network interface should be monitored (WiFi, Bluetooth, Local) user sees basic information about captured packets like: time, source, destination, protocol, length. Wireshark offers various useful options depending on how thorough the investigation has to be.
However, in Nokia Wireshark is a basic diagnostic tool used in many departments. Many organizations don’t allow Wireshark and similar tools on their networks. Also the promiscuous mode is available allows the user to see all the other packets on the network, instead of only the packets addressed to certain network adapter/interface. Wireshark includes filters, color coding, and other features that let user dig deep into network traffic and inspect individual packets. Due to a large number of add-ons, it can recognize and decode numerous communication protocols. It allows capturing data packets in real time, recording, and decoding them. Wireshark is a opensource sniffer – program whose main purpose is to capture and analyze the network data flow. The following article concerns the usage of Wireshark program in Nokia laboratory tests and problem investigation. In telecommunication field, especially in new technology development, the connection problems are often found.
0 kommentar(er)
