Procedura per la configurazione di un tunnel Anycast con i router di bordo della rete ninux.org di Roma ai fini di distribuire gli indirizzi pubblici nella rete, senza l'uso di policy routing.
Chiedere su contatti [AT] ninux [DOT] org l'assegnazione di un indirizzo pubblico <assigned pub ip>


'''Client side'''
olsr.conf (on nearest olsr node):
{{{
#olsr.conf
...
Hna <assigned pub ip> 255.255.255.255
...
}}}
client script:

{{{
#!/bin/bash
greifname=$1
local_ip=$2
pub_ip=$3
remote_ip=10.0.162.1
ip tunnel add $greifname  mode gre remote $remote_ip local $local_ip ttl 255
ip link set $greifname up
ip addr add $pub_ip dev $greifname
ip rule add from $pub_ip table 115
ip route add default dev $greifname table 115
}}}
usage example: tunnel_gre.sh ninuxpub <priv_ipv4> <assigned pub ip>/32



'''Server side''' '''(ON BORDER ROUTER ONLY)'''

In the olsr.conf file make sure you are announcing the anycast address
{{{
#olsr.conf
...
Hna 10.0.162.1 255.255.255.255
...
}}}

Server site bash script:
{{{
#!/bin/bash
greifname=$1
ip addr add 10.0.162.1/32 dev lo
ip tunnel add $greifname  mode gre local 10.0.162.1 ttl 255
ip link set $greifname up
}}}
tunnel  script: example: ./bgpsidescript.sh ninuxpub

'''Video'''

 http://wiki.ninux.org/SkillSharing2015/Ninux_BGP_GRE_Anycast

 https://archive.org/details/Ninux.BGP.GRE.Anycast.by.Nino.parziale.20150312.ninux.org

 https://vimeo.com/141252767

 https://vimeo.com/141252766