HELP: MacBook cannot get IP from DHCP wired/wireless

Hi, everyone.
I recently bought a TP-LINK TL-WR340G route and added it into my home network.
My iBook and PCs are albe to connect to network and internet, but my MacBook even cannot get a IP from the DHCP. I tried both wired & wireless connection.
I've tried to give my MacBook a static IP address, after that it can ping to the gateway and other devices on the network, and the DNS is working fine. But the MacBook just cannot connect to internet.
My MacBook can connect to internet at my office and my relative's house.
Please help to fix the problem. Thanks a lot.

What is the device type?
I have seen this with 4 android 5 devices. I think its something to due with misconfig on android and mfp settings. Although I'm not sure why I have hundreds of other android 5 devices working ok. I see this same when I debug one of the devices that is stuck in DHCP_REQ
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 Processing RSN IE type 48, length 20 for mobile ac:cf:23:41:bb:76
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 Received 802.11i PSK key management suite, enabling Authentication
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 RSN Capabilities: 0
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 apfValidateDot11iCapabilities:1286 Received RSNIE with Capabilities with STA MFPC: 0, STA MFPR:0, & AP MFPC:0MFPR:0
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 Marking Mobile as non-11w Capable
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 apfValidateDot11wGroupMgmtCipher:1716, Received NULL 11w Group Mgmt Cipher Suite for STA, hence returning
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 pemApfDeleteMobileStation2: APF_MS_PEM_WAIT_L2_AUTH_COMPLETE = 0.
*apfMsConnTask_4: Mar 18 10:20:11.347: ac:cf:23:41:bb:76 0.0.0.0 DHCP_REQD (7) Deleted mobile LWAPP rule on AP [64:d9:89:47:fb:d0]
*pemReceiveTask: Mar 18 10:20:11.347: ac:cf:23:41:bb:76 0.0.0.0 Removed NPU entry.
Here is some links with more info about possible mfp issues
http://forum.xda-developers.com/google-nexus-5/help/android-5-0-wlan-bug-peap-maschapv2-t2938281/page4
http://www.reddit.com/r/Nexus5/comments/2pdv2y/wifi_authentication_issues_with_nexus_5_after/
https://code.google.com/p/android/issues/detail?id=78702  comments 30,39,52,53,78
http://w1.fi/cgit/hostap/commit/?id=9f6a7cddc42811883d6035032854089475f2fc65

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