Ok.. Wasn't sure how to title this thread but here's the situation.

I have a 2nd PC with centos 5 on it. The onboard NIC works fine with the network. When I plug in my wireless usb Netgear wg111t it ONLY works when the onboard nic is connected to the router.

If I unplug the ethernet cable from the PC the wireless USB wont work. What's the deal?


I have set the wireless USB as both DHCP and static I with gateway/DNS/subnet mask

uname -r
2.6.18-53.1.4.el5

Output


# ifconfig
eth0 Link encap:Ethernet HWaddr 00:118:A1:171
inet addr:192.168.1.9 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::211:d8ff:fea1:17d1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9111 errors:0 dropped:0 overruns:0 frame:0
TX packets:8110 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:584633 (570.9 KiB) TX bytes:615901 (601.4 KiB)
Interrupt:185 Base address:0x2000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:560 (560.0 b) TX bytes:560 (560.0 b)

wlan0 Link encap:Ethernet HWaddr 00:14:6C:37:E9:C3
inet addr:192.168.1.11 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::214:6cff:fe37:e9c3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1061 errors:0 dropped:0 overruns:0 frame:0
TX packets:57 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:91852 (89.6 KiB) TX bytes:9267 (9.0 KiB)




# iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wlan0 IEEE 802.11g ESSID:"linksys_SES_24172"
Mode:Managed Frequency:2.437 GHz Access Point: 00:14:BF:0F:84:F5
Bit Rate:54 Mb/s
Encryption key:off
Link Quality:79/100 Signal level:-45 dBm Noise level:-96 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

sit0 no wireless extensions.


lspci
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 74)


lsusb -v

Bus 004 Device 003: ID 1385:4250 Netgear, Inc
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x1385 Netgear, Inc
idProduct 0x4250
bcdDevice 0.01
iManufacturer 1 Atheros Communications Inc
iProduct 2 WG111T
iSerial 3 1.0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 46
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
Remote Wakeup
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 255 Vendor Specific Class
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1



Port 4: 0000.0503 highspeed power enable connect



# lsusb
Bus 003 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 004 Device 003: ID 1385:4250 Netgear, Inc
Bus 004 Device 001: ID 0000:0000



# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 wlan0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 wlan0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0



# cat /etc/resolv.conf
; generated by /sbin/dhclient-script
search earthlink.net
nameserver 207.69.188.185
nameserver 207.69.188.186
nameserver 207.69.188.187


nmap -v -sP 192.168.1.0-255 | grep up
Host 192.168.1.1 appears to be up.
Host 192.168.1.2 appears to be up.
Host 192.168.1.6 appears to be up.

Host 192.168.1.9 appears to be up.
Host 192.168.1.11 appears to be up.


Nmap finished: 256 IP addresses (5 hosts up) scanned in 4.862 seconds



when both NICs are connected I can ssh from another PC to both of these addresses


Host 192.168.1.9 appears to be up.
Host 192.168.1.11 appears to be up.

the 2 IPs when both NICs are working.


When I unplug the ethernet(eth0) and reboot. I can not ping/ssh/etc into the 192.168.1.11(wlan0)
but nmap says that ip .11 is up


any advice??

3/23/2008 6:22:04 PM