[OLSR-users] Problems to transmit two hops away...

[Andreas Tønnesen]

Hi,


what is the result of:
cat /proc/sys/net/ipv4/ip_forward
?

If this file contains 0 then IP forwarding is not enabled. Do a:
echo "1" > /proc/sys/net/ipv4/ip_forward

It also seems as ICMP redirects are not disabeled on the 192.168.11.2 
node. This can be disabled by setting:
echo "0" > /proc/sys/net/ipv4/conf/<INT NAME>/send_redirects
where <INT NAME> is the label of the interface(eg. eth0). Olsrd should
set thieese proc entries itself, so something must have happened here... 
you are sure olsrd is running on 192.168.11.2?

- Andreas


(spam-protected) wrote:
> Hi there...
> 
> I set up a testbed with four computers using OLSRD and it was working
> properly... but now (after two weeks of not using it) I cannot do a ping
> to reach a computer located more than one hop away...
> 
> I though that the the forwarding node could have the FORWARDING attribute
> blocked, but I checked the IPTables and it is not like that... the output
> of "iptables --list" at the forwarding computer is:
> 
> 
> Chain INPUT (policy ACCEPT)
> target     prot opt source               destination
> DROP       all  --  192.168.11.4         anywhere
> ACCEPT     udp  --  anywhere             anywhere            udp dpt:698
> 
> Chain FORWARD (policy ACCEPT)
> target     prot opt source               destination
> ACCEPT     all  --  anywhere             anywhere
> 
> Chain OUTPUT (policy ACCEPT)
> target     prot opt source               destination
> ACCEPT     all  --  anywhere             anywhere
> 
> 
> I am trying to PING from 192.168.11.3 to 192.168.11.1 passing by
> 192.168.11.2, but I get the following output..
> 
> PING 192.168.11.1 (192.168.11.1) 56(84) bytes of data.
>>From 192.168.11.2: icmp_seq=0 Redirect Host(New nexthop: 192.168.11.1)
>>From 192.168.11.2: icmp_seq=1 Redirect Host(New nexthop: 192.168.11.1)
>>From 192.168.11.2: icmp_seq=2 Redirect Host(New nexthop: 192.168.11.1)
>>From 192.168.11.2: icmp_seq=3 Redirect Host(New nexthop: 192.168.11.1)
>>From 192.168.11.2: icmp_seq=4 Redirect Host(New nexthop: 192.168.11.1)
> 
> 
> The routing table of the transmitter computer (192.168.11.3) is:
> 
> 
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 192.168.11.2    *               255.255.255.255 UH    1      0        0 eth1
> 192.168.11.1    192.168.11.2    255.255.255.255 UGH   2      0        0 eth1
> 192.168.1.0     *               255.255.255.0   U     0      0        0 eth0
> 192.168.11.0    *               255.255.255.0   U     0      0        0 eth1
> 169.254.0.0     *               255.255.0.0     U     0      0        0 eth0
> 127.0.0.0       *               255.0.0.0       U     0      0        0 lo
> default         192.168.1.1     0.0.0.0         UG    0      0        0 eth0
> 
> 
> I have tried every idea that has came to my mind but I cannot make it
> work... Any idea anybody?
> 
> 
> Thanks in advance
> 
> 
> 
> _______________________________________________
> olsr-users mailing list
> (spam-protected)
> https://www.olsr.org/mailman/listinfo/olsr-users

-- 
Andreas Tønnesen
http://www.olsr.org