On Fri, 2003-09-19 at 03:14, Asbjorn Hoiland Aarrestad wrote: > Got a challenging routing problem, and perhaps some of you can help me. > > The network is as follows. > We have 12 "standalone" nodes with wireless lan cards. The nodes are > placed on a line, and the average distance between each node is 400 > meters. With good wireless cards, that means that we can reach two or > three node neighbours on each side of a node. (the nodes will be placed > in the middle of nowhere, security is not the issue since the biggest > security risk will be the ice and polar bears. This also means that > putting up tp-wires is not an option) > > on each side of the line of nodes, there will be a server. There will > only be people at the first server (beside the first node) The nodes > will be collecting data, and we want to transfer the data to the server > beside the first node. But we also want to be able to telnet into each > of the nodes to be able to do maintainance (so we don't have to use a > snow-mobile and get very cold each time there is a problem on one of the > nodes) > > Any ideas on how to make a "good enough" network, enabeling us to > communicate between the nods and the servers? >
To take Sean's suggestion of static routes at first I thought I would start another sub-thread. Given my limited experience ( I have never had more than one route to a given location on our network). I would set it up so that each node has its wifi interface subnetted to a minimum of two networks. I would first set it up like this in the lab to test: Design a series of networks (one between each machine) Each network can be subnetted into 4 ipaddress blocks. lets use the ever popular 192.168.0.0 block: if we subnet the 192.168.0.0/24 further into 192.168.0.0/30 or netmask 255.255.255.252 you get 64 subnets with 128 usable hosts (remember that each subnet uses two addresses for network address and broadcast. I use a perl script I found called ipcalc.pl to help me visualize this sort of subnetting. A portion of the output for this configuration looks like this: [EMAIL PROTECTED] bhughes]$ ipcalc.pl 192.168.0.0/24 255.255.255.252 Address: 192.168.0.0 11000000.10101000.00000000 .00000000 Netmask: 255.255.255.0 = 24 11111111.11111111.11111111 .00000000 Wildcard: 0.0.0.255 00000000.00000000.00000000 .11111111 => Network: 192.168.0.0/24 11000000.10101000.00000000 .00000000 (Class C) Broadcast: 192.168.0.255 11000000.10101000.00000000 .11111111 HostMin: 192.168.0.1 11000000.10101000.00000000 .00000001 HostMax: 192.168.0.254 11000000.10101000.00000000 .11111110 Hosts/Net: 254 (Private Internet RFC 1918) Subnets Netmask: 255.255.255.252 = 30 11111111.11111111.11111111.111111 00 Wildcard: 0.0.0.3 00000000.00000000.00000000.000000 11 Network: 192.168.0.0/30 11000000.10101000.00000000.000000 00 (Class C) Broadcast: 192.168.0.3 11000000.10101000.00000000.000000 11 HostMin: 192.168.0.1 11000000.10101000.00000000.000000 01 HostMax: 192.168.0.2 11000000.10101000.00000000.000000 10 Hosts/Net: 2 (Private Internet RFC 1918) Network: 192.168.0.4/30 11000000.10101000.00000000.000001 00 (Class C) Broadcast: 192.168.0.7 11000000.10101000.00000000.000001 11 HostMin: 192.168.0.5 11000000.10101000.00000000.000001 01 HostMax: 192.168.0.6 11000000.10101000.00000000.000001 10 Hosts/Net: 2 (Private Internet RFC 1918) Network: 192.168.0.8/30 11000000.10101000.00000000.000010 00 (Class C) Broadcast: 192.168.0.11 11000000.10101000.00000000.000010 11 HostMin: 192.168.0.9 11000000.10101000.00000000.000010 01 HostMax: 192.168.0.10 11000000.10101000.00000000.000010 10 Hosts/Net: 2 (Private Internet RFC 1918) <big snip> Network: 192.168.0.248/30 11000000.10101000.00000000.111110 00 (Class C) Broadcast: 192.168.0.251 11000000.10101000.00000000.111110 11 HostMin: 192.168.0.249 11000000.10101000.00000000.111110 01 HostMax: 192.168.0.250 11000000.10101000.00000000.111110 10 Hosts/Net: 2 (Private Internet RFC 1918) Network: 192.168.0.252/30 11000000.10101000.00000000.111111 00 (Class C) Broadcast: 192.168.0.255 11000000.10101000.00000000.111111 11 HostMin: 192.168.0.253 11000000.10101000.00000000.111111 01 HostMax: 192.168.0.254 11000000.10101000.00000000.111111 10 Hosts/Net: 2 (Private Internet RFC 1918) Subnets: 64 Hosts: 128 you get the idea. server1 eth0:192.168.0.1/30 | | | eth0 - 192.168.0.2/30 node1 eth0:1 - 192.168.0.5/30 | | | eth0 - 192.168.0.6/30 node2 eth0:1 - 192.168.0.9/30 | | | . -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED] https://www.redhat.com/mailman/listinfo/redhat-list
