RARE user and assistance email list

[Frédéric LOUI <>]

Hi Edgar,

In networking you have other tools besides « ping ».

1- traceroute 
    This command is available in very host. In freeRtr you would have to 
precise VRF
2- show ipv4 route <VRF_NAME>
    In freeRtr case. This is is a powerful command that will let you see the 
routing table :)

I might be wrong but you bound wireless to veth1a (belonging linux)
But veth1b (belonging to linux) is bound to freeRTr with rawInt socket.


What is the status on linux of veth1a ?
What is the status on linux and freeRtr of veth1b when you shut wlan0 ?  

Then try your Linux to do a "ip route show » and check default route.
Please also do the same with freeRtr (show ipv4 route <VRF_NAME>

This will help you trace packet path.

And if you are unsure use tcpdump -I (with icmp and host filter if you want)

Good luck
Frederic

> Le 26 sept. 2022 à 19:40, Edgard <> a écrit :
> 
> Hi all,
> 
> I started a thread like this in the old list (), 
> and I don't know if anyone else got this message as I got a send error 
> return.
> So I decided to post it here. I apologize if I repeat the content.
> 
> After a few months, I returned to this thread.
> The following commands worked.
>  
> hwdet-all.sh
> [...]
> ### wireless interface  ###
> ip link set wlan0 up multicast on promisc on mtu 1500
> ethtool -K wlan0 rx off
> ethtool -K wlan0 tx off
> ethtool -K wlan0 sg off
> ethtool -K wlan0 tso off
> ethtool -K wlan0 ufo off
> ethtool -K wlan0 gso off
> ethtool -K wlan0 gro off
> ethtool -K wlan0 lro off
> ethtool -K wlan0 rxvlan off
> ethtool -K wlan0 txvlan off
> ethtool -K wlan0 ntuple off
> ethtool -K wlan0 rxhash off
> ethtool --set-eee wlan0 eee off
> /sbin/wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant/example.conf
> /sbin/dhclient wlan0
> [...]
> ### wireless connection ###
> ip link add veth1a type veth peer name veth0
> ip link set veth0 name veth1b
> ip link set veth1a up multicast on promisc on mtu 1500
> ethtool -K veth1a rx off
> ethtool -K veth1a tx off
> ethtool -K veth1a sg off
> ethtool -K veth1a tso off
> ethtool -K veth1a ufo off
> ethtool -K veth1a gso off
> ethtool -K veth1a gro off
> ethtool -K veth1a lro off
> ethtool -K veth1a rxvlan off
> ethtool -K veth1a txvlan off
> ethtool -K veth1a ntuple off
> ethtool -K veth1a rxhash off
> ethtool --set-eee veth1a eee off
> ip link set veth1b up multicast on promisc on mtu 1500
> ethtool -K veth1b rx off
> ethtool -K veth1b tx off
> ethtool -K veth1b sg off
> ethtool -K veth1b tso off
> ethtool -K veth1b ufo off
> ethtool -K veth1b gso off
> ethtool -K veth1b gro off
> ethtool -K veth1b lro off
> ethtool -K veth1b rxvlan off
> ethtool -K veth1b txvlan off
> ethtool -K veth1b ntuple off
> ethtool -K veth1b rxhash off
> ethtool --set-eee veth1b eee off
> ip link set veth1a up address 00:00:11:11:22:22 mtu 1500
> [...]
>  
> rtr-hw.txt
> [...]
> proc wifi.sh /rtr/pcap2pcap.bin wlan0 veth1a
> proc ifc2.sh /rtr/rawInt.bin veth1b 20004 127.0.0.1 20003 127.0.0.1
> int eth2 stat eth 00:00:11:11:22:22 127.0.0.1 20003 127.0.0.1 20004
> [...]
>  
> rtr-sw.txt
> [...]
> interface ethernet2
>  description wifi connection
>  vrf forwarding inet
>  no shutdown
>  no log-link-change
>  exit
> [...]
>  
> But... There are still errors in this config that I couldn't understand.
>  
> In Debian managed interface
> root@optiplex790:~# ping -I wlan0 8.8.8.8 -c 4
> PING 8.8.8.8 (8.8.8.8) from 192.168.25.10 wlan0: 56(84) bytes of data.
> 64 bytes from 8.8.8.8: icmp_seq=1 ttl=56 time=20.6 ms
> 64 bytes from 8.8.8.8: icmp_seq=2 ttl=56 time=20.3 ms
> 64 bytes from 8.8.8.8: icmp_seq=3 ttl=56 time=18.7 ms
> 64 bytes from 8.8.8.8: icmp_seq=4 ttl=56 time=18.6 ms
>  
> On RARE/freeRtr even with wlan0 down
> freertr#ping 8.8.8.8 source eth2                                            
>                                                                             
>                                                           
> pinging 8.8.8.8, src=null, vrf=inet, cnt=5, len=64, df=false, tim=1000, 
> gap=0, ttl=255, tos=0, sgt=0, flow=0, fill=0, alrt=-1, sweep=false, 
> multi=false
> !!!!!
>  
> It was too good to be true. I think I'm forgetting something.
> 
> ---
> Edgard.
> 



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