DHCP fails to get IP address

I'm using dhcpcd to try to get a lease for an IP address, but each attempt is met with a "timed out" message. The DHCP server works for other Arch Linux installs on this network, and it works for the same laptop when using Windows. This install also fails when trying on other DHCP servers, not just on my home network. I'm not sure what it is now. I usually run iptables, but I stopped it thinking it might be the problem. I've also stopped networkmanager. I have a completely updated system, I ran pacman -Syu just now and rebooted.
I can manually set the IP address and it works fine, and I've tried dhclient instead of dhcpcd.
root@thinkpad ~# dhcpcd --release
dhcpcd[7377]: dhcpcd not running
root@thinkpad ~# dhcpcd -d eth0
dhcpcd[7378]: version 5.2.12 starting
dhcpcd[7378]: eth0: using hwaddr ....
dhcpcd[7378]: eth0: executing `/usr/lib/dhcpcd/dhcpcd-run-hooks', reason PREINIT
dhcpcd[7378]: eth0: executing `/usr/lib/dhcpcd/dhcpcd-run-hooks', reason CARRIER
dhcpcd[7378]: eth0: broadcasting for a lease
dhcpcd[7378]: eth0: sending DISCOVER (xid 0x485d8657), next in 4.24 seconds
dhcpcd[7378]: eth0: sending DISCOVER (xid 0x485d8657), next in 7.21 seconds
dhcpcd[7378]: eth0: sending DISCOVER (xid 0x485d8657), next in 15.01 seconds
dhcpcd[7378]: eth0: sending DISCOVER (xid 0x485d8657), next in 31.15 seconds
dhcpcd[7378]: timed out
# lspci -v | grep -A10 Ethernet
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
Subsystem: Lenovo Device 21ce
Flags: bus master, fast devsel, latency 0, IRQ 50
Memory at d5300000 (32-bit, non-prefetchable) [size=128K]
Memory at d532b000 (32-bit, non-prefetchable) [size=4K]
I/O ports at 6040 [size=32]
Capabilities: [c8] Power Management version 2
Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [e0] PCI Advanced Features
Kernel driver in use: e1000e
Kernel modules: e1000e
and
# dmesg | grep e1000e
shows the link is up:
e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
This is my rc.conf with the comments removed:
LOCALE="en_US.UTF-8"
DAEMON_LOCALE="no"
HARDWARECLOCK="localtime"
TIMEZONE="America/Indiana/Indianapolis"
KEYMAP="us"
CONSOLEFONT=
CONSOLEMAP=
USECOLOR="yes"
MODULES=(fuse nvidia thinkpad_acpi)
UDEV_TIMEOUT=30
USEDMRAID="no"
USEBTRFS="no"
USELVM="no"
HOSTNAME="thinkpad"
interface=eth0
address=
netmask=
broadcast=
gateway=
NETWORK_PERSIST="no"
DAEMONS=(!hwclock syslog-ng udev @slim network iptables dbus @bluetooth networkmanager @acpid !smbnetfs crond @alsa @cpufreq)
Last edited by fester (2011-12-09 22:48:47)

Mavrick, that did not fix it.
NgoHuy... dhcpcd -C eth0 did not solve the problem either.
I think dhcpcd is broken for wlan0 too...
root@thinkpad ~# dhcpcd -C eth0
dhcpcd[8439]: version 5.2.12 starting
dhcpcd[8439]: eth0: broadcasting for a lease
dhcpcd[8439]: wlan0: broadcasting for a lease
dhcpcd[8439]: timed out
dhcpcd[8439]: forked to background, child pid 8453
I also tried
dhcpcd eth0 -C /usr/lib/dhcpcd/dhcpcd-run-hooks
and that didn't work.
I removed dhcpcd:
root@thinkpad ~# pacman -Runs dhcpcd
and reinstalled it
root@thinkpad ~# pacman -S dhcpcd
and i still get the same problem
root@thinkpad ~# dhcpcd -d eth0
dhcpcd[8590]: version 5.2.12 starting
dhcpcd[8590]: eth0: using hwaddr .....
dhcpcd[8590]: eth0: executing `/usr/lib/dhcpcd/dhcpcd-run-hooks', reason PREINIT
dhcpcd[8590]: eth0: executing `/usr/lib/dhcpcd/dhcpcd-run-hooks', reason CARRIER
dhcpcd[8590]: eth0: broadcasting for a lease
dhcpcd[8590]: eth0: sending DISCOVER (xid 0x4b4b814b), next in 3.91 seconds
dhcpcd[8590]: eth0: sending DISCOVER (xid 0x4b4b814b), next in 8.73 seconds
dhcpcd[8590]: eth0: sending DISCOVER (xid 0x4b4b814b), next in 15.68 seconds
dhcpcd[8590]: eth0: sending DISCOVER (xid 0x4b4b814b), next in 32.46 seconds
dhcpcd[8590]: timed out
Last edited by fester (2011-12-08 13:03:41)

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Jan 24 12:10:11 fileserver bootpd[73839]: service time 0.000283 seconds
Jan 24 12:10:19 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:19 fileserver bootpd[73839]: service time 0.000291 seconds
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Recently setup a new DHCP server on Mac OS X Server 10.5.8 running on an Xserve. We migrated from a Linux server.
The Xserve was originally just a file server. So the only services currently running are: AFP, DHCP, NFS, and SMB. No additional software is running.
The DHCP server ran just fine for the first couple weeks. But then we found some computers just stopped getting IP addresses from the DHCP server. Some were new computers introduced to the network. Some were laptops that had left and come back. However, the DHCP server is definitely still giving out IP addresses and renewing them for most new and existing computers. There have been five computers that have not gotten IP addresses so far, and that had been the case both on the wireless and on a wired connection. Two were PC's, one running Windows 7 and one running Windows XP with Lenovo's ThinkVantage software. The other three were different models of MacBook Pros.
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So I guess you could say the problem I'm experiencing is for a few computers the DHCP server seems to only be able to provide static addresses, but not dynamic ones with a lease time.
I have logging set to the highest for the DHCP server. Below is the first thing I noticed that keeps showing up. Sometimes it shows a different MAC address than the one below. None of the afflicted computers have that MAC address, though. I have not seen any other errors in the logs for the DHCP server.
Jan 24 12:09:47 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:09:47 fileserver bootpd[73839]: service time 0.000304 seconds
Jan 24 12:09:50 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:09:50 fileserver bootpd[73839]: service time 0.000280 seconds
Jan 24 12:09:54 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:09:54 fileserver bootpd[73839]: service time 0.000264 seconds
Jan 24 12:10:03 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:03 fileserver bootpd[73839]: service time 0.000265 seconds
Jan 24 12:10:11 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:11 fileserver bootpd[73839]: service time 0.000283 seconds
Jan 24 12:10:19 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:19 fileserver bootpd[73839]: service time 0.000291 seconds
Jan 24 12:10:28 fileserver bootpd[73839]: DHCP DISCOVER [en1]: 1,0:23:32:c1:31:c3
Jan 24 12:10:28 fileserver bootpd[73839]: service time 0.000324 seconds

Wireless Router 877W users cannot get ip address from DHCP

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ip subnet-zero
ip cef
no ip dhcp use vrf connected
ip dhcp excluded-address 10.10.10.1
ip dhcp excluded-address 192.168.239.1 192.168.239.50
ip dhcp pool users
   network 192.168.239.0 255.255.255.0
   default-router 192.168.239.1
   dns-server 4.2.2.2
bridge irb
interface ATM0
no ip address
no atm ilmi-keepalive
dsl operating-mode auto
interface ATM0.1 point-to-point
no snmp trap link-status
pvc 8/35
pppoe-client dial-pool-number 1
interface FastEthernet0
interface FastEthernet1
interface FastEthernet2
interface FastEthernet3
interface Dot11Radio0
no ip address
encryption vlan 1 key 1 size 40bit 0 1234567890 transmit-key
encryption vlan 1 mode wep mandatory
ssid wirele
    vlan 1
    authentication open
    guest-mode
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
channel 2437
station-role root
interface Dot11Radio0.1
encapsulation dot1Q 1 native
no snmp trap link-status
no cdp enable
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 spanning-disabled
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
interface Vlan1
description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$
ip address 192.168.239.1 255.255.255.0
ip nat inside
ip virtual-reassembly
ip tcp adjust-mss 1452
bridge-group 1
bridge-group 1 spanning-disabled
interface Dialer1
ip address negotiated
ip nat outside
ip virtual-reassembly
encapsulation ppp
ip tcp adjust-mss 1452
dialer pool 1
no cdp enable
ppp authentication pap callin
ppp pap sent-username xxxx password xxx
crypto map MerkezVPN
interface Dialer0
no ip address
interface BVI1
no ip address
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1

go into config t and add "bridge 1 route ip" and see what you get....

Unable to get IP address from DHCP

hi all,
I have a AP1131 which cannot get IP from DHCP server. I have tried to configure static IP address and controller IP by lwapp command and the AP can successfully joined the controller. However, after I changed it to DHCP in WLC, it cannot get IP address and all lwapp config is gone. It cannot join the controller anymore only after I reset it and configure a static IP for it. The following error message appears after I changed it to DHCP in the WLC:
*Mar 7 08:44:36.511: RESETTING THE STATIC IP ADDRESS: LWAPP goes back to discovery
%WIDS-6-DISABLED: IDS Signature is removed and disabled.
%LWAPP-5-CHANGED: LWAPP changed state to DISCOVERY
%LWAPP-5-CHANGED: LWAPP changed state to DISCOVERY
%LINK-3-UPDOWN: Interface Dot11Radio0, changed state to up
%LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up
%LWAPP-3-CLIENTERRORLOG: Config Command: error verifying sequence number
%LINK-5-CHANGED: Interface Dot11Radio1, changed state to reset
%LINK-5-CHANGED: Interface Dot11Radio0, changed state to reset
%LWAPP-3-CLIENTERRORLOG: Config Command: error verifying sequence number
%LWAPP-3-CLIENTERRORLOG: Config Command: error verifying sequence number
%LWAPP-3-CLIENTERRORLOG: Config Command: error verifying sequence number
%LWAPP-3-CLIENTERRORLOG: Config Command: error verifying sequence number
%LWAPP-3-CLIENTERRORLOG: Config Command: error verifying sequence number
Any expert has some idea on it?
Thanks.

Is that AP on the same subnet as the other AP's? The thing is, when you configure the AP with static information, you say the AP is able to join the WLC. This means that there is no issue with the AP. Now when you set the AP to use DHCP and not static, the AP does not obtain a DHCP address? Is that correct? If you have more than one AP on the same switch and on the same vlan, and only one has an issue, then maybe reset that AP to default and see if that fixes it. I'm also assuming that the vlan is being forwarded and you have enough dhcp address in the scope.

WLC 5760 with internal DHCP server, clients no get IP address

Hi all,
I have 2 Cisco 5760 WLC (active-standby) IOS-Xe 03.03.03SE with one WLAN.
sh wlan summary
Number of WLANs: 1
WLAN Profile Name SSID VLAN Status
1 Invitados_ADSL Guest 905 UP
sh vlan
VLAN Name Status Ports
1 default active Te1/0/3, Te1/0/4, Te1/0/5, Te1/0/6, Te2/0/3
Te2/0/4, Te2/0/5, Te2/0/6
100 VLAN0100 active Te1/0/1, Te2/0/1
101 Planta_1 active
905 Internet active Te1/0/2, Te2/0/2
The DHCP server is internal.
Sometimes the clients no get IP address and the DHCP pool has IP addresses available.
The workaround done by me to solve the issue is “clear ip dhcp binding *”.
Some days later the problem appears again.
I see this bug with a similar problem:
NGWC blocks DHCP traffic if wireless broadcast disabled
CSCun88928
Description
Symptom:
Some clients set the BROADCAST flag on the DHCP Discover packet. This requires the DHCP server to reply with a broadcast.
In that case and if you are not using DHCP snooping on the 5760/3850, then the controller will block the return traffic unless you enable "wireless broadcast" which enables broadcast globally (and is thus not always desirable)
Conditions:
Seen on 3.3.2 IOS-XE
Workaround:
Use DHCP snooping with the "ip dhcp snooping wireless bootp-broadcast command"
OR
Enable "wireless broadcast" globally
My DHCP configuration is:
ip dhcp relay information trust-all
ip dhcp snooping vlan 905
ip dhcp snooping
ip dhcp excluded-address 172.16.0.1 172.16.0.19
ip dhcp excluded-address 172.16.1.250 172.16.1.254
ip dhcp pool Invitados
network 172.16.0.0 255.255.254.0
default-router 172.16.0.1
dns-server 212.66.160.2 212.49.128.65
lease 0 8
I see in Cisco documentation (http://www.cisco.com/en/US/docs/wireless/technology/5760_deploy/CT5760_Centralized_Configuration_eg.html) this configuration:
DHCP Snooping and Trust Configuration on CT5760
ip dhcp snooping vlan 100, 200
ip dhcp snooping wireless bootp-broadcast enable
ip dhcp snooping
interface TenGigabitEthernet1/0/1
description Connection to Core Switch
switchport trunk allowed vlan 100, 200
switchport mode trunk
ip dhcp relay information trusted ip dhcp snooping trust
interface Vlan100
description Client Vlan
ip dhcp relay information trusted
My question is,Do I have to add the command "ip dhcp snooping wireless bootp-broadcast enable" to solve the issue?
Thanks in advance.
Regards.
D

Yes, test it with the command you mentioned
ip dhcp snooping wireless bootp-broadcast enable
HTH
Rasika
**** Pls rate all useful responses *****

DHCP fails to get IP address

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