diff options
Diffstat (limited to 'sysconfig/network-scripts/ifup-ipv6')
| -rwxr-xr-x | sysconfig/network-scripts/ifup-ipv6 | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/sysconfig/network-scripts/ifup-ipv6 b/sysconfig/network-scripts/ifup-ipv6 index e8960553..45b1140a 100755 --- a/sysconfig/network-scripts/ifup-ipv6 +++ b/sysconfig/network-scripts/ifup-ipv6 @@ -11,7 +11,7 @@ # # RHL integration assistance by Pekka Savola <pekkas@netcore.fi> # -# Version 2002-11-02 +# Version 2002-11-12a # # Note: if called (like normally) by /etc/sysconfig/network-scripts/ifup # exit codes aren't handled by "ifup" @@ -35,6 +35,7 @@ # Optional for 6to4 tunneling (hardwired name of tunnel device is "tun6to4"): # IPV6TO4INIT=yes|no: controls 6to4 tunneling setup # IPV6TO4_RELAY=<IPv4 address>: IPv4 address of the remote 6to4 relay (default: 192.88.99.1) +# IPV6TO4_MTU=<MTU for IPv6>: controls IPv6 MTU for the 6to4 link (optional, default is MTU of interface - 20) # IPV6TO4_IPV4ADDR=<IPv4 address>: overwrite local IPv4 address (optional) # IPV6TO4_ROUTING="<device>-<suffix>/<prefix length> ...": information to setup local subnetting # Example: IPV6TO4_ROUTING="eth0-:f101::0/64 eth1-:f102::0/64" @@ -198,7 +199,22 @@ if [ "$IPV6TO4INIT" = "yes" ]; then # Setup 6to4 tunnel (hardwired name is "tun6to4"), if config is valid if [ "$valid6to4config" = "yes" ]; then - ipv6_add_6to4_tunnel tun6to4 $ipv4addr || exit 1 + # Get MTU of master device + ipv4mtu="`ipv6_exec_ip link show dev $DEVICE | grep -w "mtu" | awk '{ print $5 }'`" + if [ -n "$ipv4mtu" ]; then + # IPv6 tunnel MTU is IPv4 MTU minus 20 for IPv4 header + tunnelmtu=$[ $ipv4mtu - 20 ] + fi + + if [ -n "$IPV6TO4_MTU" ]; then + if [ $IPV6TO4_MTU -gt $tunnelmtu ]; then + echo $"Warning: configured MTU '$IPV6TO4_MTU' for 6to4 exceeds maximum limit of '$tunnelmtu', ignored" + else + tunnelmtu=$IPV6TO4_MTU + fi + fi + + ipv6_add_6to4_tunnel tun6to4 $ipv4addr "" $tunnelmtu || exit 1 # Add default route, if device matches if [ "$IPV6_DEFAULTDEV" = "tun6to4" ]; then @@ -217,7 +233,7 @@ if [ "$IPV6TO4INIT" = "yes" ]; then if [ -z "$gateway" ]; then gateway="$ipv6to4_relay" fi - ipv6_add_route $network $ipv6to4_relay tun6to4 + ipv6_add_route $network $gateway tun6to4 done fi |