Integrated sensing and communication (ISAC) is a new feature for future sixth generation (6G) cellular networks. There are four sensing modes, including monostatic, multiple monostatic, bistatic and multistatic, the networking schemes of which is a key issue in the ISAC networks. In this paper, we propose two types of networking schemes for them, in consideration of both interference elimination and sensing performance. One is the “fish scale” networking scheme and the other is “ring shape”. The former select one cell from each site with the same beam direction as the sensing transceiver for the first two modes to avoid both the inter-site and the inter-cell interference. The latter set all the three cells within one site as sensing transmitters (Txs) or receivers (Rxs) for the last two modes, and adjacent sites play different roles when sensing. We also design area division for targets at different positions of the network. The system-level simulations show the signal-to-noise ratio as well as the sensing accuracy for different networking schemes, and verifies the performance gain by involving more sensing Txs and Rxs.