network $vm_ipv4
broadcast $vm_ipv4
netmask 255.255.255.255
- #mtu 1300
+ mtu 1300
+ # NOTE: il y a besoin de ça en l'état actuel du réseau de Grenode
+ # car la MTU des tunnels GRE/IPsec entre les routeurs de Grenode l'impose.
+ #
+ # root@ateliers:~# ping -M do -c 1 -s \$((1500-20-8-200)) soupirail.grenode.net
+ # PING soupirail.grenode.net (91.216.110.1) 1272(1300) bytes of data.
+ # 1280 bytes from soupirail.grenode.net (91.216.110.1): icmp_req=1 ttl=63 time=18.0 ms
+ #
+ # --- soupirail.grenode.net ping statistics ---
+ # 1 packets transmitted, 1 received, 0% packet loss, time 0ms
+ # rtt min/avg/max/mdev = 18.027/18.027/18.027/0.000 ms
+ # root@ateliers:~# ping -M do -c 1 -s \$((1500-20-8-200+1)) soupirail.grenode.net
+ # PING soupirail.grenode.net (91.216.110.1) 1273(1301) bytes of data.
+ # From estran.grenode.net (91.216.110.6) icmp_seq=1 Frag needed and DF set (mtu = 1300)
+ #
+ # --- soupirail.grenode.net ping statistics ---
+ # 0 packets transmitted, 0 received, +1 errors
post-up ip address add $vm_ipv4/32 dev \$IFACE
pre-down ip address delete $vm_ipv4/32 dev \$IFACE
EOF