| 1 |
I rebooted by Gentoo system, and regret it greatly -- some |
| 2 |
update or other has invalidated my network configuration, |
| 3 |
and I still don't know how to fix it. (I'm posting this from an |
| 4 |
Ubuntu machine). |
| 5 |
|
| 6 |
This machine's interface to the outside world is eth1 (eth0 |
| 7 |
exists, but is a local LAN). In /etc/conf.d/net, there was |
| 8 |
|
| 9 |
iface_eth1="64.166.164.49 broadcast 64.166.164.55 netmask 255.255.255.248" |
| 10 |
gateway="eth1/64.166.164.54" |
| 11 |
|
| 12 |
This used to work fine. Now it causes complaints about a deprecated syntax |
| 13 |
and advice to go look in /etc/conf.d/net.example. It also complains |
| 14 |
that there's |
| 15 |
no module to provide broadcast or netmask. Moreover, it does not bring up |
| 16 |
a useable network. Here's the output of route(1) |
| 17 |
|
| 18 |
Kernel IP routing table |
| 19 |
Destination Gateway Genmask Flags Metric Ref Use Iface |
| 20 |
64.166.164.48 * 255.255.255.248 U 0 0 0 eth1 |
| 21 |
loopback * 255.0.0.0 U 0 0 0 lo |
| 22 |
|
| 23 |
Note the lack of a gateway. |
| 24 |
|
| 25 |
I've tried various other things after looking into net.example, and here's |
| 26 |
the most likely thing I've come up with: |
| 27 |
|
| 28 |
config_eth1=( "64.166.164.49/29 brd 64.166.164.55" ) |
| 29 |
gateway=( "eth1/64.166.164.54" ) |
| 30 |
|
| 31 |
This no longer gives me syntax complaints, but also does not bring up a |
| 32 |
gateway: |
| 33 |
|
| 34 |
Kernel IP routing table |
| 35 |
Destination Gateway Genmask Flags Metric Ref Use Iface |
| 36 |
64.166.164.48 * 255.255.255.248 U 0 0 0 eth1 |
| 37 |
loopback * 255.0.0.0 U 0 0 0 lo |
| 38 |
|
| 39 |
So I tried going back to tried and true things: ifconfig. I tried this script: |
| 40 |
ifconfig eth1 down |
| 41 |
ifconfig eth1 64.166.164.49 netmask 255.255.255.248 |
| 42 |
ifconfig eth1 up |
| 43 |
route add 0.0.0.0 gw 64.166.164.54 |
| 44 |
|
| 45 |
And now I have a gateway of sorts, but it does not work: |
| 46 |
|
| 47 |
Kernel IP routing table |
| 48 |
Destination Gateway Genmask Flags Metric Ref Use Iface |
| 49 |
default router 255.255.255.255 UGH 0 0 0 eth1 |
| 50 |
64.166.164.48 * 255.255.255.248 U 0 0 0 eth1 |
| 51 |
loopback * 255.0.0.0 U 0 0 0 lo |
| 52 |
|
| 53 |
I compared this to the output of route(1) on this Ubuntu box, and notice that |
| 54 |
the flags contain "H", which means 'the target is a host'. This also happens |
| 55 |
if I give a netmask of 0.0.0.0 in the route command. I know it's not working |
| 56 |
because any attempt I've made to send packets beyond the router have |
| 57 |
failed with "network unreachable", and tcpdump indicates that NO packets |
| 58 |
were sent. On the other hand, pinging the router itself works, and tcpdump |
| 59 |
can see it. The router in in the telco CO, not here, and is also used by this |
| 60 |
Ubuntu machine, so it is not implicated. |
| 61 |
|
| 62 |
I also know that the interface card is working locally, because I can get |
| 63 |
in via ssh from this Ubuntu machine. I cannot get in from beyond the |
| 64 |
router because the host does not know to send reply packets to the |
| 65 |
gateway. |
| 66 |
|
| 67 |
It appears that I need to have a gateway (so my /etc/conf.d/net needs to |
| 68 |
do that) and it may need to have the "H" flag off. |
| 69 |
|
| 70 |
Can anyone else who uses a static IP setup take a look and see what |
| 71 |
I'm doing differently? |
| 72 |
|
| 73 |
++ kevin |
| 74 |
|
| 75 |
-- |
| 76 |
Kevin O'Gorman, PhD |
| 77 |
-- |
| 78 |
gentoo-user@g.o mailing list |
Archives