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Updated Quagga (markdown)

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howto/Quagga.md
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@ -18,47 +18,49 @@ To connect to bgpd use:
$ vtysh
Which provides an interactive interface.
In this interface the following commands can be used:
In this interface '?' can be used to list the available commands or subcommands.
The following text use this placeholders:
## Configure Quagga
a minimal config would look like this:
- `<AS>` your Autonomous System Number (only the digits)
- `<GATEWAY_IP>` your gateway ip (the internal dn42 ip address you use on the host, where dn42 is running)
- `<SUBNET>` your registered dn42 subnet, which you allocated on [nixnodes](https://io.nixnodes.net/)
- `<PEER_IP>` dn42 ip of your peer who is connected with you using your favorite vpn/tunnel protocol (openvpn, ipsec, tinc, ...)
- `<INTERFACE>` Interface which is used to connect to the peer, in case of openvpn it is the tun device
- `<PEER_AS>` Autonomous System Number of your peer (only the digits)
vtysh> configure terminal
vtysh(config)> router bgp <your-asn>
vtysh(config-router)> neighbor <neighbor-ip> remote-as <neighbor-asn>
vtysh(config-router)> neighbor <neighbor-ip> interface <interface>
vtysh(config-router)> exit
vtysh(config)> exit
## Configure a new ipv6 peering
### IPv6
for IPv6 do something like
In your interactive vtysh session type the following:
vtysh> configure terminal
vtysh(config)> router bgp <your-asn>
vtysh(config-router)> neighbor <neighbor-ip> remote-as <neighbor-asn>
vtysh(config-router)> neighbor <neighbor-ip> interface <interface>
vtysh(config-router)> no neighbor <neighbor-ip> activate
vtysh(config-router)> address-family ipv6
vtysh(config-router-af)> neighbor <neighbor-ip> activate
vtysh(config-router-af)> exit
vtysh(config-router)> exit
vtysh(config)> exit
### peer groups, prefix lists and such
If you want to use 'prefix-list' to filter some of the prefixes quagga is receiving, you can use a 'peer-group' instead of apply the prefix list to every neighbor.
```
vtysh> configure terminal
vtysh> router bgp <AS>
vtysh> neighbor <PEER_IP> remote-as <PEER_AS>
vtysh> neighbor <PEER_IP> peer-group dn
vtysh> neighbor <PEER_IP> interface <INTERFACE>
vtysh> no neighbor <PEER_IP> activate
vtysh> exit
vtysh> address-family ipv6
vtysh> neighbor <PEER_IP> activate
vtysh> neighbor <PEER_IP> soft-reconfiguration inbound
vtysh> exit
```
Define a peer group:
## Configure a new ipv4 peering
vtysh(config-router)> neighbor <peer-group-name> peer-group
```
vtysh> configure terminal
vtysh> router bgp <AS>
vtysh> neighbor <PEER_IP> remote-as <PEER_AS>
vtysh> neighbor <PEER_IP> peer-group dn
vtysh> neighbor <PEER_IP> interface <INTERFACE>
vtysh> exit
```
Apply to a neighbor:
# show bpg session status
vtysh(config-router)> neighbor <neighbor-ip> peer-group <name>
Apply a prefix list for incoming prefixes to your peer group:
vtysh(config-router)> neighbor <peer-group-name> prefix-list <prefix-list-name> in
## show bpg session status
in this example:
* an active bgp session exists with peer 64713.