I have an existing local network connected using 'old' ethernet nics and coax cabling. It is connected via a Linux 8.2 machine to the internet on a Broadband Cable Modem. The Linux machine is a gateway and runs DHCP, DNS, Squid, SuSEFirewall2, Samba to provide services to the network. I want to progressively migrate the local connections to 100 Mb/s Twisted Pair, so during the transition I shall have a third nic in the machine with some hosts on the coax and some on the RJ45/100 Mb/s How do I configure the services to support the additional local network, with minimum disruption to the existing (unmigrated hosts). The Linux machine has a fixed IP address in the local net (192.168.0.101) and allocates IP addresses in the range 192.168.0.102-199. I want all the hosts to continue to 'see' one another during the transition. Can I uses similar addresses on the new subnet (e.g. set the nic as 192.168.0.201 and assign addresses 192.168.0.202-299) or do I need to use a new subnet (e.g 192.168.1.xxx) Many thanks for specific advice or some pointers to where to find the answers. Philip