Re: problem with dhcp client

chmod700-r · ‎10-02-2007

hi, i have a cisco soho 91.

i have a problem with client dhcp: on e0 of my router there is my lan and e0 have a static ip (192.168.2.0), WAN port must have dinamic ip assigned by ISP. this is my configuration:

Router#sh run

Building configuration...

Current configuration : 3402 bytes

!

version 12.3

service nagle

no service pad

service tcp-keepalives-in

service tcp-keepalives-out

service timestamps debug datetime msec

service timestamps log datetime msec

service password-encryption

!

hostname Router

!

no logging buffered

logging rate-limit 500

enable secret 5 xxxxxxxxxxxxxxxxxxxx

!

username Router password 7 xxxxxxxxxxx

no aaa new-model

ip subnet-zero

no ip source-route

ip tcp selective-ack

ip tcp window-size 2144

ip tcp synwait-time 50

!

no ip bootp server

ip cef

!

interface Ethernet0

ip address 192.168.2.1 255.255.255.0

ip access-group 130 in

ip nat inside

no cdp enable

!

interface Ethernet1

ip address dhcp

no ip redirects

no ip unreachables

no ip proxy-arp

ip accounting access-violations

ip nat outside

duplex auto

no cdp enable

!

ip nat inside source list PERMISSIONI_NAT interface Ethernet1 overload

ip classless

no ip forward-protocol udp bootps

no ip forward-protocol udp tftp

no ip forward-protocol udp nameserver

no ip forward-protocol udp domain

no ip forward-protocol udp time

no ip forward-protocol udp netbios-ns

no ip forward-protocol udp netbios-dgm

no ip forward-protocol udp tacacs

no ip http server

no ip http secure-server

!

ip access-list standard PERMISSIONI_NAT

permit 192.168.2.0 0.0.0.255

but i don't recive any ip.

now post result of debug dhcp det

chmod700-r · ‎10-02-2007

*Mar 1 00:40:40.267: DHCP: Waiting for 10 seconds on interface Ethernet1

*Mar 1 00:40:44.619: DHCP: QScan: Purging entry

*Mar 1 00:40:44.619: DHCP: deleting entry 814549E4 0.0.0.0 from list

*Mar 1 00:40:44.619: Temp IP addr: 0.0.0.0 for peer on Interface: unknown

*Mar 1 00:40:44.619: Temp sub net mask: 0.0.0.0

*Mar 1 00:40:44.619: DHCP Lease server: 0.0.0.0, state: 8 Purging

*Mar 1 00:40:44.619: DHCP transaction id: 25FE

*Mar 1 00:40:44.619: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs

*Mar 1 00:40:44.619: No timer running

*Mar 1 00:40:44.619: Retry count: 0 Client-ID:

*Mar 1 00:40:44.619: Hostname: Router

*Mar 1 00:40:50.267: DHCP: Try 3 to acquire address for Ethernet1

*Mar 1 00:40:50.267: DHCP: allocate request

*Mar 1 00:40:50.267: DHCP: zapping entry in DHC_PURGING state for Et1

*Mar 1 00:40:50.267: DHCP: new entry. add to queue

*Mar 1 00:40:50.271: DHCP: SDiscover attempt # 1 for entry:

*Mar 1 00:40:50.271: Temp IP addr: 0.0.0.0 for peer on Interface: Ethernet1

*Mar 1 00:40:50.271: Temp sub net mask: 0.0.0.0

*Mar 1 00:40:50.271: DHCP Lease server: 0.0.0.0, state: 1 Selecting

*Mar 1 00:40:50.271: DHCP transaction id: 2600

*Mar 1 00:40:50.271: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs

*Mar 1 00:40:50.271: Next timer fires after: 00:00:03

*Mar 1 00:40:50.271: Retry count: 1 Client-ID: cisco-0012.d9ae.1905-Et1

*Mar 1 00:40:50.271: Hostname: Router

*Mar 1 00:40:50.271: DHCP: SDiscover: sending 293 byte length DHCP packet

*Mar 1 00:40:50.271: DHCP: SDiscover 293 bytes

*Mar 1 00:40:50.275: B'cast on Ethernet1 interface from 0.0.0.0

*Mar 1 00:40:53.271: DHCP: SDiscover attempt # 2 for entry:

*Mar 1 00:40:53.271: Temp IP addr: 0.0.0.0 for peer on Interface: Ethernet1

*Mar 1 00:40:53.271: Temp sub net mask: 0.0.0.0

*Mar 1 00:40:53.271: DHCP Lease server: 0.0.0.0, state: 1 Selecting

*Mar 1 00:40:53.271: DHCP transaction id: 2600

*Mar 1 00:40:53.271: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs

*Mar 1 00:40:53.271: Next timer fires after: 00:00:03

*Mar 1 00:40:53.271: Retry count: 2 Client-ID: cisco-0012.d9ae.1905-Et1

*Mar 1 00:40:53.271: Hostname: Router

*Mar 1 00:40:53.271: DHCP: SDiscover: sending 293 byte length DHCP packet

*Mar 1 00:40:53.271: DHCP: SDiscover 293 bytes

*Mar 1 00:40:53.275: B'cast on Ethernet1 interface from 0.0.0.0

*Mar 1 00:40:56.271: DHCP: SDiscover attempt # 3 for entry:

*Mar 1 00:40:56.271: Temp IP addr: 0.0.0.0 for peer on Interface: Ethernet1

*Mar 1 00:40:56.271: Temp sub net mask: 0.0.0.0

*Mar 1 00:40:56.271: DHCP Lease server: 0.0.0.0, state: 1 Selecting

*Mar 1 00:40:56.271: DHCP transaction id: 2600

*Mar 1 00:40:56.271: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs

*Mar 1 00:40:56.271: Next timer fires after: 00:00:03

*Mar 1 00:40:56.271: Retry count: 3 Client-ID: cisco-0012.d9ae.1905-Et1

*Mar 1 00:40:56.271: Hostname: Router

*Mar 1 00:40:56.271: DHCP: SDiscover: sending 293 byte length DHCP packet

*Mar 1 00:40:56.271: DHCP: SDiscover 293 bytes

*Mar 1 00:40:56.275: B'cast on Ethernet1 interface from 0.0.0.0

*Mar 1 00:40:59.271: DHCP: QScan: Timed out Selecting state

*Mar 1 00:41:10.267: DHCP: QScan: Purging entry

*Mar 1 00:41:10.267: DHCP: deleting entry 8147AABC 0.0.0.0 from list

*Mar 1 00:41:10.267: Temp IP addr: 0.0.0.0 for peer on Interface: unknown

*Mar 1 00:41:10.267: Temp sub net mask: 0.0.0.0

*Mar 1 00:41:10.267: DHCP Lease server: 0.0.0.0, state: 8 Purging

*Mar 1 00:41:10.267: DHCP transaction id: 25FF

*Mar 1 00:41:10.267: Lease: 0 secs, Renewal: 0 secs, Rebind: 0 secs

*Mar 1 00:41:10.267: No timer running

*Mar 1 00:41:10.267: Retry count: 0 Client-ID:

*Mar 1 00:41:10.267: Hostname: Router%Unknown DHCP problem.. No allocation possible

what is the problem?

there is a mistake in my configuration?

noran01 · ‎10-02-2007

what kind of device is upstream from your E1 interface? (i.e. cable modem? adsl modem?).

Depending on what device it is have your power-cycled that upstream device? Some cable devices will cache a single MAC Address and if you switch downstream devices, the newly attached device will not receive an IP if the cable device has not been power cycled.

chmod700-r · ‎10-02-2007

after E1 interfaces there are 5 wireless antennas (5GHz) and after there is a dhcp server.