9.1 An overview of DLSw support in CCL DLSw support in CCL V1.2.1 enables you to connect SNA remote stations to CCL NCP across an IP network without using an external router with DLSw capabilities. This allows you to use IP connectivity in your Data Center instead of LLC2 protocol on the LAN and WAN aggregation platforms for remote connections. DLSw support helps migrating a typical SNA network to CCL and reduces the complexity of your network by removing the need for external equipment. We show in Figure 9-1 how CCL NCP can be connected to your IP network to transport SNA traffic, and we compare this to the connectivity you had to establish before DLSw support in CCL V1.2.1 was provided. SNA IP SNA NCP NCP Token Ring Token Ring LLC2 DLSw LLC2 NCP Fram e Re DLSw l ay DLSw IP Network Linux on System z Q X. 25 LLC CCL NCP