Date: Sat, 2 Feb 2002 19:26:00 -0600 From: Philip R.Moyer <prm@hyperon.com> To: freebsd-mobile@freebsd.org Subject: Stranger still - Re: (wireless query) wi0 interface associated, but no DHCP response? Message-ID: <02020219260002.20492@seawolf.complexsys.net>
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I know it's bad form to reply to your own mail, but I have some additional
information. I had originally sent the appended mail regarding my WPC11
and association in the wireless LAN, but no DHCP response.
At Jim Binkley's suggestion, I ran tcpdump on the wi0 interface to look
at what's going on with the wireless network. I manually configured the
interface using ifconfig. I am able to see both outgoing packets and
incoming traffic from the interface, but the OS is not "seeing" the packets.
For example, before I send anything I can see the NetBIOS chatter
from the WindozeME box on the wireless LAN. When I try to ping the
Linksys AP, I see the arp request for the AP's address, immediately
followed by the arp reply. The MAC address for the AP never shows up
in the FreeBSD box's arp cache, though. At that point, I manually
entered the MAC address.
Then I tried to ping the AP. The echo request goes out, followed immediately
by the echo reply, but ping reports 100% packet loss. IOW, tcpdump can
see the echo reply, but the it never reaches the originating program.
Stranger still, I can see the traffic from the aforementioned ME box. If I
ping the ME machine's IP address, ping sees the replies with no problems.
I'm not that experienced with wireless protocols; does this look to
anyone indicative of a particular problem? If anyone has suggestions,
I'd love to hear them.
Regards,
Phil
"Reality, like truth and beauty, is in the eye of the beholder."
- John L. Casti
------------- original message ----------------
I have 4.5-RELEASE (from ISO images) running on a Sony PCG-F350
laptop. In it, I have a Linksys WPC11 PCMCIA wireless card.
My WAP is also a Linksys. The SSID is the default ("linksys"), channel 6,
etc - a basic vanilla setup. I run /etc/start_if.wi0 by hand, then, by hand,
run "dhclient wi0".
The sytem recognizes the card and loads the drivers perfectly (cool! :-) but
I can't get it to participate in my local network. The card is associated,
but I can't get DHCP response from my WAP.
Here's what "ifconfig wi0" has to say:
wi0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::204:5aff: fecd:bd86%wi0 prefixlen 64 scopeid 0x7
inet 0.0.0.0 netmask 0xff000000 broadcast 255.255.255.255
ether 00:04:5a:cd:bd:86
media: IEEE 802.11 Wireless Ethernet autoselect (DS/11Mbps)
status: associated
ssid linksys
stationname "FeeBSD WaveLAN/IEEE node"
channel 6 authmode NONE powersavemode OFF powersavesleep 100
wepmode OFF weptxkey 1
The WAP is configured to serve DHCP.
Here's the output from "wicontrol -i wi0":
NIC serial number: [ 99A010000000 ]
Station name: [ FreeBSD WaveLAN/IEEE node ]
SSID for IBSS creation: [ linksys ]
Current netname (SSID): [ linksys ]
Desired netname (SSID): [ linksys ]
Current BSSID: [ 00:04:5a:d0:b0:2b ]
Channel list: [ 2047 ]
IBSS channel: [ 6 ]
Current channel: [ 6 ]
Comms quality/signal/noise: [ 3 50 0 ]
Promiscuous mode: [ Off ]
Port type (1=BSS, 3=ad-hoc): [ 1 ]
MAC address: [ 00:04:5a:cd:bd:86 ]
TX rate (selection): [ 3 ]
TX rate (actual speed): [ 11 ]
RTS/CTS handshake threshold: [ 2347 ]
Create IBSS: [ Off ]
Access point density: [ 1 ]
Power Mgmt (1=on, 0=off): [ 0 ]
Max sleep time: [ 100 ]
WEP encryption: [ Off ]
TX encryption key: [ 1 ]
Encryption keys: [ ][ ][ ]
Here's my /etc/start_if.wi0:
#!/bin/sh
/usr/sbin/wicontrol -i wi0 -p 1
/usr/sbin/wicontrol -i wi0 -t 3
/usr/sbin/wicontrol -i wi0 -f 6
/usr/sbin/wicontrol -i wi0 -n linksys
Now, the MAC address doesn't show up in the WAP's dhcp client list,
as I would expect. This leads me to believe the request isn't even
getting to the WAP. BTW, the card worked flawlessly under RedHat 7.2.
I would certainly appreciate any advice anyone might provide me to fix
this problem!
Cheers,
Phil
P.S. Please include prm@hyperon.com in the reply or cc; Comcast just
switched us from the @home network to their own, and I'm not reliably
receiving my mail yet....
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