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local [2023-04-23 18:05] – [2. Configuration] victorlocal [2025-11-04 08:28] (current) – [2.2 Connecting your machines to cbridge] victor
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 ====== - Setting up a local private Chaosnet ====== ====== - Setting up a local private Chaosnet ======
  
-If you want to play around with Chaosnet, connecting two or more of your emulated systems, without connecting to the [[global|Global Chaosnet]], the following is intended to be helpful.+If you want to play around with Chaosnet, connecting two or more of your emulated systems, without connecting to the [[global|Global Chaosnet]], the following is intended to be helpful. See also [[https://github.com/bictorv/chaosnet-bridge/blob/master/doc/EXAMPLES.md|example configs]] for cbridge.
  
 ===== - Background ===== ===== - Background =====
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 For the [[global|Global Chaosnet]], subnets are allocated per "site". Not everyone might want to connect to the Global Chaosnet, or you might want an isolated subnet for experiments or playing around. For the [[global|Global Chaosnet]], subnets are allocated per "site". Not everyone might want to connect to the Global Chaosnet, or you might want an isolated subnet for experiments or playing around.
  
-In order to minimise address collisions and routing problems, one subnet has been allocated as a private, non-routed subnet. No routing information about that subnet should be sent outside that subnet, no packets from that subnet should be sent to other subnets, and any packets received from that subnet on another subnet should be dropped. This is similar to the IP [wp>Private network]s such as 10.x.y.z or 192.168.x.y.+In order to minimise address collisions and routing problems, one subnet has been reserved as a private, non-routed subnet. No routing information about that subnet should be sent outside that subnet, no packets from that subnet should be sent to other subnets, and any packets received from that subnet on another subnet should be dropped. This is similar to the IP [[wp>Private network]]s such as 10.x.y.z or 192.168.x.y.
  
 That subnet is 376 (octal, = 254 decimal) which gives addresses 177001-177377 octal. That subnet is 376 (octal, = 254 decimal) which gives addresses 177001-177377 octal.
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 The IP addresses of the hosts running the PDP10 emulator (for ITS), the CADR emulator (usim), and the Chaosnet bridge (cbridge) are represented by ITSHOST,  CADRHOST, and CBRHOST. The IP addresses of the hosts running the PDP10 emulator (for ITS), the CADR emulator (usim), and the Chaosnet bridge (cbridge) are represented by ITSHOST,  CADRHOST, and CBRHOST.
-These are typically local IP address such as 192.168.0.x or 10.0.0.y, but if they are all running on the same host they can all be 127.0.0.1.+These are typically local IP address such as 192.168.0.x or 10.0.0.y, but if they are all running on the same host they can all be 127.0.0.1. Make sure the addresses match between the different config files, e.g. using 127.0.0.1 consistently (rather than the local "external" IP address such as 10.0.0.42), if you use it.
  
 The UDP port for encapulated Chaosnet packets is by default 42042, but if the hosts are on the same machine the ports for each must be different, e.g. 42043, 42044 etc. Below they are represented by ITSPORT, CADRPORT, and CBRPORT. The UDP port for encapulated Chaosnet packets is by default 42042, but if the hosts are on the same machine the ports for each must be different, e.g. 42043, 42044 etc. Below they are represented by ITSPORT, CADRPORT, and CBRPORT.
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 Make sure the file ''sys/site/hosts.text'' has an entry for CADR-1 with the address $CADR_CHAOS. Make sure the file ''sys/site/hosts.text'' has an entry for CADR-1 with the address $CADR_CHAOS.
  
 +=== - But how can I still use the built-in FILE server for usim? ===
 +
 +Please add
 +<code>
 +servername = MIT-OZ
 +udp_local_hybrid = true
 +</code>
 +
 +where MIT-OZ should be in your sys/site/hosts.text (which it originally is). The address should match that which is defined in the LISPM system, and should be on the same subnet as the CADR, i.e. have an address in the range 177001-177377. ((If the CADR doesn't think the server is on a reachable subnet, it will not even try sending packets there!))
 +
 +This makes all packets to/from the MIT-OZ address (such as the FILE server, TIME server etc) be handled by the "local" backend, and all other packets by the "udp" backend.
  
 ==== - Connecting your machines to cbridge ==== ==== - Connecting your machines to cbridge ====
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 Advantages: Advantages:
   * you can connect more than two machines   * you can connect more than two machines
-  * you can use [[https://github.com/bictorv/chaosnet-bridge/blob/master/NCP.md|the Chaosnet "API"]] from your unix-like host+  * you can use [[https://github.com/bictorv/chaosnet-bridge/blob/master/doc/NCP.md|the Chaosnet "API"]] from your unix-like host
   * you can at a later stage connect to the Global Chaosnet   * you can at a later stage connect to the Global Chaosnet
   * you can connect to a local Ethernet-based Chaosnet (e.g. for LambdaDelta)   * you can connect to a local Ethernet-based Chaosnet (e.g. for LambdaDelta)
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   * the usim emulator is running on 192.168.0.101,    * the usim emulator is running on 192.168.0.101, 
   * the cbridge is running on 192.168.0.99,   * the cbridge is running on 192.168.0.99,
-  * and the Chaosnet addresses are as in the [[#configuration|example above].+  * and the Chaosnet addresses are as in the [[#configuration|example above]].
  
 ==== - klh10 ==== ==== - klh10 ====
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 HOST CADR-1, CHAOS 177042,USER,LISPM,LISPM,[CADR-1,CADR1,LM1] HOST CADR-1, CHAOS 177042,USER,LISPM,LISPM,[CADR-1,CADR1,LM1]
 HOST DB, CHAOS 177001,SERVER,ITS,PDP10,[DB] HOST DB, CHAOS 177001,SERVER,ITS,PDP10,[DB]
 +HOST MIT-OZ, CHAOS 177060,SERVER,UNIX,VAX,[OZ]
 </code> </code>
  
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 hosts = sys/site/hosts.text hosts = sys/site/hosts.text
 myname = CADR-1 myname = CADR-1
 +servername = MIT-OZ
 backend = udp backend = udp
 bridgeip = 192.168.0.100 bridgeip = 192.168.0.100
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 bridgeport_local = 42044 bridgeport_local = 42044
 bridgechaos = 177001 bridgechaos = 177001
 +udp_local_hybrid = true
  
 [disk] [disk]
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 </code> </code>
  
-Remember that when you introduce the cbridge, you need to update the klh10 and usim init files:+Remember that when you introduce the cbridge, you need to update the klh10 and usim init files above:
   * for klh10: replace ''chip=177042/192.168.0.101:42044'' with ''chip=177040/192.168.0.99''   * for klh10: replace ''chip=177042/192.168.0.101:42044'' with ''chip=177040/192.168.0.99''
-  * for usim: replace ''bridgeip = 192.168.0.100'' with ''bridgeip = 192.168.0.99'' and replace ''bridgeport = 42043'' with ''bridgeport = 42042'' (or remove it, since it is the default).+  * for usim:  
 +    * replace ''bridgeip = 192.168.0.100'' with ''bridgeip = 192.168.0.99'' and  
 +    * replace ''bridgeport = 42043'' with ''bridgeport = 42042'' (or remove it, since it is the default).
  
local.1682265938.txt.gz · Last modified: by victor
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