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ThinkMo EDU Share – network 82.Detailed explanation of DLSw

蒂娜 No Comments 05/11/2023

ThinkMo EDU Share – network 82.Detailed explanation of DLSw

Data Link Switching (DLSw) is a protocol used to connect two or more separate IBM Systems Network Architecture (SNA) networks over a non-SNA network. In this article, we will provide a detailed explanation of DLSw, including its features, working, advantages, and disadvantages.

Features of DLSw

DLSw has the following features:

  1. Connectivity: DLSw provides connectivity between different SNA networks over non-SNA networks, such as TCP/IP.
  2. Transparent bridging: DLSw supports transparent bridging, which allows SNA traffic to be bridged over non-SNA networks without any modifications.
  3. Routing: DLSw supports both static and dynamic routing protocols, such as Routing Information Protocol (RIP), Open Shortest Path First (OSPF), and Border Gateway Protocol (BGP).
  4. Encryption: DLSw supports encryption of SNA traffic over non-SNA networks using the Data Encryption Standard (DES).

Working of DLSw

DLSw works based on the following steps:

  1. DLSw is configured on each of the routers connecting the separate SNA networks.
  2. DLSw routers exchange information about the SNA networks they are connected to, including the network address and topology.
  3. DLSw routers establish a logical link between the SNA networks, allowing SNA traffic to be routed over the non-SNA network.
  4. DLSw routers can encrypt SNA traffic over the non-SNA network using DES.

Advantages of DLSw

DLSw protocol offers the following advantages:

  1. Connectivity: DLSw provides connectivity between different SNA networks over non-SNA networks, which allows for greater network flexibility and scalability.
  2. Transparent bridging: DLSw supports transparent bridging, which allows SNA traffic to be bridged over non-SNA networks without any modifications, which simplifies network management.
  3. Routing: DLSw supports both static and dynamic routing protocols, which provides greater network flexibility and scalability.
  4. Encryption: DLSw supports encryption of SNA traffic over non-SNA networks using the Data Encryption Standard (DES), which provides enhanced security for SNA traffic.

Disadvantages of DLSw

DLSw protocol has the following disadvantages:

  1. Complexity: DLSw can be complex to configure and manage because it requires knowledge of both SNA and non-SNA networking protocols.
  2. Limited interoperability: DLSw is a proprietary protocol developed by IBM, which limits interoperability with other vendors’ networking protocols.
  3. Limited scalability: DLSw is not suitable for large networks because it has a limited number of routers that can participate in a DLSw network.

Conclusion

In conclusion, DLSw protocol is a protocol used to connect two or more separate IBM Systems Network Architecture (SNA) networks over a non-SNA network. It provides connectivity, transparent bridging, routing, and encryption of SNA traffic over non-SNA networks. However, it has some disadvantages, such as being complex to configure and manage, limited interoperability, and limited scalability. Therefore, DLSw protocol is best suited for small to medium-sized networks with IBM SNA networks.

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