router sees my wireless mac addres but I cannot ping it

[gosha]

OpenBSD 4.5 stable.
Hello,
I suddenly don't have wireless connection, but don't know since when, because these days I was connecting through cable.
Well, this is ifconfig:

iwn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	lladdr my mac address
	priority: 0
	groups: wlan
	media: IEEE802.11 autoselect (OFDM24 mode 11g)
	status: active
	ieee80211: nwid mylan chan 6 bssid router mac address 239dB wpapsk <not displayed> wpaprotos wpa1,wpa2 wpaakms psk wpaciphers tkip,ccmp wpagroupcipher tkip
	inet6 fe80::222:faff:fef5:62fa%iwn0 prefixlen 64 scopeid 0x2
	inet 192.168.1.102 netmask 0xffffff00 broadcast 192.168.1.255

my router sees my mac address but does not seem to give a ip address, it gives it if I connect through cable though.
Anyway, I cannot ping:

$ ping 192.168.1.1 
PING 192.168.1.1 (192.168.1.1): 56 data bytes
	ping: sendto: Host is down
ping: wrote 192.168.1.1 64 chars, ret=-1
ping: sendto: Host is down
ping: wrote 192.168.1.1 64 chars, ret=-1
ping: sendto: Host is down
ping: wrote 192.168.1.1 64 chars, ret=-1
ping: sendto: Host is down
ping: wrote 192.168.1.1 64 chars, ret=-1
ping: sendto: Host is down
ping: wrote 192.168.1.1 64 chars, ret=-1

I did not change anything from the last time I used it, what could it be?
I've tried turning off router and modem and rebooting. Nothing.

[jggimi]

Just a guess (since you did not post your complete ifconfig):

Your wired and wireless NICs are using the same subnet. You have a routing problem. See the trunk(4) man page for the appropriate way to manage this.

[gosha]

actually, before posting I did try to completly disactivate the wired nic, removing its hostname.em0 and now it shows as "status: no carrier"

[gosha]

ok guys, sometimes I really feel stupid!
I've set up the trunk interface as suggested by jggimi (by the way, thanks a lot, I didn't know its existence), and now by miracle wireless started to work. But why? I did switch off the ethernet card altoghether. Really cannot understand.
Now wireless works, but if I plug in the ethernet cable, running ifconfig will show em0 as active, but then I cannot browse the internet, it hangs there looking up.

Here are the settings:

$ cat /etc/hostname.em0 
up

$ cat /etc/hostname.iwn0 
up chan 6 nwid mylan wpa wpapsk mykey

$ cat /etc/hostname.trunk0 
trunkproto failover trunkport em0 trunkport iwn0 192.168.1.102 netmask 255.255.255.0

ifconfig wireless:

$ ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33204
	priority: 0
	groups: lo
	inet 127.0.0.1 netmask 0xff000000
	inet6 ::1 prefixlen 128
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
	lladdr macaddress
	priority: 0
	trunk: trunkdev trunk0
	media: Ethernet autoselect (none)
	status: no carrier
	inet6 fe80::21f:16ff:fe1f:dae3%em0 prefixlen 64 scopeid 0x1
iwn0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
	lladdr macaddress
	priority: 0
	trunk: trunkdev trunk0
	groups: wlan
	media: IEEE802.11 autoselect (OFDM12 mode 11g)
	status: active
	ieee80211: nwid mylan chan 6 bssid macaddress 240dB wpapsk <not displayed> wpaprotos wpa1,wpa2 wpaakms psk wpaciphers tkip,ccmp wpagroupcipher tkip
	inet6 fe80::222:faff:fef5:62fa%iwn0 prefixlen 64 scopeid 0x2
enc0: flags=0<> mtu 1536
	priority: 0
trunk0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	lladdr macaddress
	priority: 0
	trunk: trunkproto failover
		trunkport iwn0 active
		trunkport em0 master
	groups: trunk egress
	media: Ethernet autoselect
	status: active
	inet 192.168.1.102 netmask 0xffffff00 broadcast 192.168.1.255
	inet6 fe80::21f:16ff:fe1f:dae3%trunk0 prefixlen 64 scopeid 0x5
pflog0: flags=141<UP,RUNNING,PROMISC> mtu 33204
	priority: 0
	groups: pflog

ifconfig with wire plugged in:

$ ifconfig 
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 33204
	priority: 0
	groups: lo
	inet 127.0.0.1 netmask 0xff000000
	inet6 ::1 prefixlen 128
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
	lladdr macaddress
	priority: 0
	trunk: trunkdev trunk0
	media: Ethernet autoselect (100baseTX full-duplex)
	status: active
	inet6 fe80::21f:16ff:fe1f:dae3%em0 prefixlen 64 scopeid 0x1
iwn0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
	lladdr macaddress
	priority: 0
	trunk: trunkdev trunk0
	groups: wlan
	media: IEEE802.11 autoselect (OFDM18 mode 11g)
	status: active
	ieee80211: nwid mylan chan 6 bssid macaddress 240dB wpapsk <not displayed> wpaprotos wpa1,wpa2 wpaakms psk wpaciphers tkip,ccmp wpagroupcipher tkip
	inet6 fe80::222:faff:fef5:62fa%iwn0 prefixlen 64 scopeid 0x2
enc0: flags=0<> mtu 1536
	priority: 0
trunk0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	lladdr macaddress
	priority: 0
	trunk: trunkproto failover
		trunkport iwn0 
		trunkport em0 master,active
	groups: trunk egress
	media: Ethernet autoselect
	status: active
	inet 192.168.1.102 netmask 0xffffff00 broadcast 192.168.1.255
	inet6 fe80::21f:16ff:fe1f:dae3%trunk0 prefixlen 64 scopeid 0x5
pflog0: flags=141<UP,RUNNING,PROMISC> mtu 33204
	priority: 0
	groups: pflog

So, please, if anybody knows:
1 Why does it not work without trunk0? (I know you're not magicians, and are not here with me, try a guess).
2 How do a get the trunk thing working properly?

As always, thanks a lot!


Let me add some more. Although wireless works, I noticed it hangs every few minutes for a few minutes. Should this be a problem with the router (a cheap TP-LINK) or with my OpenBSD configuration?

[asemisldkfj]

I'm not so sure trunk is what you're looking for here.

in the ifconfig -a you posted neither em0 or iwn0 have an IP address.

get rid of trunk.

what is your goal here? do you want to be able to use wireless while the cable is plugged in? or do you just want wireless to work when you unplug the cable?

[gosha]

Well, the initial goal was to simply have wireless work, but for some strange reason, it does work only through trunk. Which is fine for me.
From the trunk man pages:

     The following example uses an active failover trunk to set up roaming be-
     tween wired and wireless networks using two network devices.  Whenever
     the wired master interface is unplugged, the wireless failover device
     will be used:

           # ifconfig em0 up
           # ifconfig ath0 nwid my_net up
           # ifconfig trunk0 trunkproto failover trunkport em0 trunkport ath0 \
                   192.168.1.1 netmask 255.255.255.0

My understanding is: when the wire is plugged in, the system will automatically use em0, when it is unplugged, it will automatically use iwn0.
And it does switch, but em0 hangs there looking up.

in the ifconfig -a you posted neither em0 or iwn0 have an IP addre

As you see from the man page, the ip address is given only to the trunk interface, and the "real" nics use that. This is how I understand it.

[asemisldkfj]

yeah, I can't help with the trunk failover thing as I've never done that. if you want to go back to just getting the wireless working I can try to help.

[gosha]

well, at this point, I'd love to have the trunk thing working, because it can be very practical