I'm having trouble connecting to wifi. I have a fresh install of Raspbian, all packages are up to date.

The wifi adapter (Belkin N300 Micro Wireless USB Adapter - model F7D2102) is being detected, so there's no issue there; here's the output of lsusb:

Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 hub
Bus 001 Device 008: ID 05ac:020b Apple, Inc. Pro Keyboard [Mitsumi, A1048/US layout]
BUS 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
BUS 001 Device 004: ID 050d:2103 Belkin Components F7D2102 802.11n N300 Micro Wireless Adapter v3000 [Realtek RTL8192CU]
BUS 001 Device 005: ID 050d:0304 Belkin Components FSU304 USB 2.0 - 4 Ports Hub
BUS 001 Device 006: ID 05ac:0302 Apple, Inc. Optical Mouse [Fujitsu]
BUS 001 Device 007: ID 05ac:1003 Apple, Inc. Hub in Pro Keyboard {Mitsumi, A1048]

And here's the output of iwconfig:

wlan0     IEEE 802.11bgn  ESSID:"MY-NETWORK-NAME"  Nickname:"<WIFI@REALTEK>"
          Mode:Managed  Frequency:2.452 GHz  Access Point: <mac address>
          Bit Rate: 300 Mb/s   Sensitivity:0/0
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=98/100  Signal level=63/100  Noise level=0/100
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0  Missed beacon:0

lo        no wireless extensions

eth0      no wireless extensions

Here's the output of ipconfig:

eth0      Link encap:Ethernet  HWaddr:b8:27:eb:28:5c:6c
          UP BROADCAST MULTICAST MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

wlan0     Link encap:Ethernet  HWaddr ec:1a:59:64:3a:36
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:10 errors:0 dropped:26 overruns:0 frame:0
          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2586 (2.5KiB)  TX bytes: 288(288.0 B)
      

This is my /etc/network/interfaces:

auto lo

iface lo inet lookback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet manual
address 192.168.2.34
netmask 255.255.255.0
gateway 192.168.2.1
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

And this is what I have in /etc/wpa_supplicant/wpa_supplicant.conf:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
ssid="<my-network-name>"
psk="<my-network-password>"
proto=RSN
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
group=CCMP TKIP
auth_alg=OPEN
}

But no luck when I try to ping google.com:

pi@raspberrypi ~ $ ping google.com
ping: unknown host google.com

Any ideas? Let me know if I can include any additional information here.