doc/Network: Add network diagram

[noc.git] / doc / Network.mdwn

diff --git a/doc/Network.mdwn b/doc/Network.mdwn
index c60ffc7..7f9634b 100644 (file)
--- a/doc/Network.mdwn
+++ b/doc/Network.mdwn
@@ -1,26 +1,56 @@
 # Network infrastructure
 
-## VLANs
+## Networks
 
-NOC runs 2 core switches (one in each room), carrying a bunch of VLANs:
-- 33 is the management VLAN (192.168.33.0/24);
-- 127 is the LAN (192.168.127.0/24);
-- 255 (`0xFF`) is our Funkfeuer VLAN.
+NOC operates a number of networks, available as tagged VLANs on the core
+switches (one in each half of the hackerspace).  These networks are:
 
-The switches have hostnames `sw{0,1}.mgmt.realraum.at`, and the WiFi access
-points are similarly `ap{0,1}.mgmt.realraum.at`. `0` denotes the main room, and
-`1` denotes Wöhnung 2.
+| Network    | VLAN id | Extra subnets    |
+|------------|---------|------------------|
+| Management |      23 | --               |
+| IoT        |      33 | --               |
+| Services   |      34 | --               |
+| Public     |      36 | 89.106.211.32/27 |
+| Guests     |     127 | --               |
+| Members    |     128 | 89.106.211.64/27 |
+| `0xFF`     |     255 | --               |
+
+
+### Conventions
+
+We use a number of conventions to make things more consistent:
+
+- The DNS zone for a given network is `NET.realraum.at`, with the exception
+  of the public services network (which has `realraum.at`);
+- Networks using RFC 1918 IP space use the 192.168.VID.0/24 subnet;
+- The gateway for a network is on the last IP for the subnet.
+
+
+### Routing and firewall rules
+
+This network diagram represents networks, and the connection flows between them:
+an arrow from A to B means that a connection can be opened from network A to
+network B.  In all cases, a subset of ICMP (ECHO, ...) is allowed.
+
+Note that any given system might have interfaces in several of these networks.
+
+[[!img Network/overview.svg alt="r³ network overview"]]
 
 
 ## WiFi
 
 Each location has a single AP, `ap{0,1}.mgmt.realraum.at`, which provides SSIDs
-for the management VLAN (`realstuff`) and the LAN (`realraum` and `realraum5`);
+for the IoT network (`realstuff`) and the LAN (`realraum` and `realraum5`);
 we use Ubiquity hardware running OpenWRT.
 
 
 ## Physical locations
 
+The switches have hostnames `sw{0,1}.mgmt.realraum.at`, and the WiFi access
+points are similarly `ap{0,1}.mgmt.realraum.at`. `0` denotes the main room, and
+`1` denotes Wöhnung 2.
+
+
 ### Wöhnung 2
 
 #### Raum 1