brindging ath0 with re0 working, kinda, almost

Reinhold freebsd at violetlan.net
Thu Apr 24 17:02:22 UTC 2008


On Thu, April 24, 2008 11:23, Reinhold wrote:
> On Thu, April 24, 2008 10:03, Ivan Voras wrote:
>
>> Reinhold wrote:
>>
>>
>>
>>> I have a bridge set up on re0 and ath0 to get bridge0, here is my
>>> ifconfig
>>>
>>> ath0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST>
>>> metric 0
>>> mtu 2290
>>
>>> rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu
>>> 1500
>>>
>>>
>>
>>> bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0
>>> mtu 1500
>>
>>> The bridge is working in that both lan and wlan can access the
>>> internet perfectly well but the problem lies with accessing each
>>> other.
>>
>> Depending on what your symptoms are, maybe you need to set the mtu of
>> all three interfaces to the same value (1500).
>>
> Hi
> Thanks for the quick reply.
>
>
> The symptoms are as follows
> When connected to the wlan I can ping the firewall but not one of our
> servers, the server ip times out
>
> This is a ping from one of the laptops connected to the wlan
>
>> ping 192.168.1.1
>
> Pinging 192.168.1.1 with 32 bytes of data:
>
>
> Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
> Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
> Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
> Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
>
>
> Ping statistics for 192.168.1.1:
> Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
> Approximate round trip times in milli-seconds:
> Minimum = 0ms, Maximum = 1ms, Average = 0ms
>
>
>> ping 192.168.1.5
>
> Pinging 192.168.1.5 with 32 bytes of data:
>
>
> Request timed out.
> Request timed out.
> Request timed out.
> Request timed out.
>
>
> Ping statistics for 192.168.1.5:
> Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
>
>
> When I plug it in on the lan its works perfect with no time outs.
>
>
> How come is the MTU so low on the ath0, but its working at full speed?
> The
> wlan signal is stronger then any of our other wireless devices I've ever
> used before
>
> Regards
>
Hi

I have changed the mtu on ath0 but it had no affect at all. I ran tcpdump
on it and this is what I'm seeing

# tcpdump -n -e -t -i ath0
00:19:db:04:86:9e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42:
arp who-has 192.168.1.5 tell 192.168.1.177
00:19:db:04:86:9e > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42:
arp who-has 192.168.1.5 tell 192.168.1.177
00:11:09:3b:f7:f0 > 00:19:db:04:86:9e, ethertype ARP (0x0806), length 60:
arp reply 192.168.1.5 is-at 00:11:09:3b:f7:f0
00:19:db:04:86:9e > 00:11:09:3b:f7:f0, ethertype IPv4 (0x0800), length 66:
192.168.1.177.1305 > 192.168.1.5.80: S 3158085845:3158085845(0) win 65535
<mss 1460,nop,wscale 2,nop,nop,sackOK>

Any help would be appreciated.

Regards





More information about the freebsd-questions mailing list