docs: add route-server doc

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

1 files changed, 68 insertions, 0 deletions

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+# Route Server
+
+This page explains how to set up GoBGP as a route server.
+
+## Prerequisites
+
+Assumed that you finished [Getting Started](https://github.com/osrg/gobgp/blob/master/docs/sources/getting-started.md).
+
+## Configuration
+
+This example uses the following simple configuration file, `gobgpd.conf`. There are three changes from 
+the configuration file used in [Getting Started](https://github.com/osrg/gobgp/blob/master/docs/sources/getting-started.md)
+
+ * Peers are configured as route server clients (of course!).
+ * GoBGP oesn't try to connect to peers. It only listens and accepts.
+ * MD5 passwords are enabled.
+
+```
+$ cat gobgpd.conf
+[Global]
+  As = 64512
+  RouterId = "192.168.255.1"
+[[NeighborList]]
+  NeighborAddress = "10.0.255.1"
+  PeerAs = 65001
+  AuthPassword = "hoge1"
+  [NeighborList.RouteServer]
+    RouteServerClient = true
+  [NeighborList.TransportOptions]
+    PassiveMode = true
+[[NeighborList]]
+  NeighborAddress = "10.0.255.2"
+  PeerAs = 65002
+  AuthPassword = "hoge2"
+  [NeighborList.RouteServer]
+    RouteServerClient = true
+  [NeighborList.TransportOptions]
+    PassiveMode = true
+```
+
+Starting GoBGP
+==============
+Let's start gobgpd:
+
+```
+$ sudo -E gobgpd -f gobgpd.conf
+{"level":"info","msg":"Peer 10.0.255.1 is added","time":"2015-04-06T22:55:57+09:00"}
+{"level":"info","msg":"Peer 10.0.255.2 is added","time":"2015-04-06T22:55:57+09:00"}
+```
+
+GoBGP implements multiple RIBs, that is, each peer has own local
+RIB. Let's check respectively.
+
+```
+$ gobgp show neighbor 10.0.255.1 local
+   Network            Next Hop        AS_PATH    Age        Attrs
+*> 10.3.0.0/24        10.0.255.2      [65002]    00:05:50   [{Origin: 0} {Med: 0}]
+*> 192.168.2.0/24     10.0.255.2      [65002]    00:05:50   [{Origin: 0} {Med: 0}]
+```
+
+```
+$ gobgp show neighbor 10.0.255.2 local
+   Network            Next Hop        AS_PATH    Age        Attrs
+*> 10.3.0.0/16        10.0.255.1      [65001]    00:06:12   [{Origin: 0} {Med: 0}]
+*> 10.3.0.1/32        10.0.255.1      [65001]    00:06:12   [{Origin: 0} {Med: 0}]
+```
+
+Of course, you can also look at the adjacent rib-in and rib-out of each peer as done in [Getting Started](https://github.com/osrg/gobgp/blob/master/docs/sources/getting-started.md).