871W Cannot Get DHCP Address - Cable Modem

I am having difficulties getting my Cisco 871W SOHO router to get a
DHCP address over its FE4 interface. If I statically assign the IP
that my previous SOHO router had received through DHCP, I get Internet
connectivity with no problem. However, an address is never assigned
via DHCP.

Are there any tricks to getting a Cisco device to successfully get a
DHCP address? I am sure the commands are correct, since I have used
SDM to set the interfaces.

Thanks

 

interface FastEthernet 0
description interface connected to cable modem
ip address dhcp client-id FastEthernet 0



! if the above does not work the ISP may require the use of the SOHO
router MAC address

interface FastEthernet 0/0

! mac-address format is 12 hex digits hhhh.hhh.hhhh

! mac-address <place MAC address of old SOHO router>

mac-address hhhh.hhhh.hhhh

 

BTW

What is the make and model of the SOHO router

Who is the ISP?

 

Um, the SOHO router is the Cisco 871W that I referenced earlier. If
you're talking about the one that I am replacing, it's a DLink or
somesuch.

The ISP is Cox. I've talked with them, and they tell me that they
don't care about anything on my end of the cable modem - no need to
reset MACs.

Thanks

 

1. If DHCP problem is still persisting, then I would suggest the
following steps.


2. Enable internal logging on router

conf t
logging buffer 10000 debug
no logging console
exit

wri mem


3. Turn on debugging for DHCP requests to ISP

debug dhcp detail


4. Power cycle the modem and the 871W, in that order, waiting until the

cable modem's LEDs indicate that it has reloaded and is
functioning.


5. Capture the output of the following command and post here

show log

 

Thanks for your help with this - I am at a total loss.. Here is the
DHCP debug log:

Log Buffer (10000 bytes):
9 PCTime: %DOT11-7-AUTH_FAILED: Station 000b.7d0b.0c60 Authentication
failed
000202: *Feb 28 17:18:36.863 PCTime: %LINK-3-UPDOWN: Interface
FastEthernet4, changed state to up
000203: *Feb 28 17:18:37.863 PCTime: %LINEPROTO-5-UPDOWN: Line protocol
on Interface FastEthernet4, changed state to up
000204: *Feb 28 17:18:37.979 PCTime: DHCP: SDiscover attempt # 2 for
entry:
000205: *Feb 28 17:18:37.979 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000206: *Feb 28 17:18:37.979 PCTime: Temp sub net mask: 0.0.0.0
000207: *Feb 28 17:18:37.979 PCTime: DHCP Lease server: 0.0.0.0,
state: 1 Selecting
000208: *Feb 28 17:18:37.979 PCTime: DHCP transaction id: 172F
000209: *Feb 28 17:18:37.979 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000210: *Feb 28 17:18:37.979 PCTime: Next timer fires after:
00:00:04
000211: *Feb 28 17:18:37.979 PCTime: Retry count: 2 Client-ID:
0015.c653.9062
000212: *Feb 28 17:18:37.979 PCTime: Client-ID hex dump:
0015C6539062
000213: *Feb 28 17:18:37.979 PCTime: Hostname: cisco871
000214: *Feb 28 17:18:37.979 PCTime: DHCP: SDiscover: sending 277 byte
length DHCP packet
--More--  000215: *Feb 28 17:18:37.979
PCTime: DHCP: SDiscover 277 bytes
000216: *Feb 28 17:18:37.979 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
000217: *Feb 28 17:18:41.979 PCTime: DHCP: SDiscover attempt # 3 for
entry:
000218: *Feb 28 17:18:41.979 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000219: *Feb 28 17:18:41.979 PCTime: Temp sub net mask: 0.0.0.0
000220: *Feb 28 17:18:41.979 PCTime: DHCP Lease server: 0.0.0.0,
state: 1 Selecting
000221: *Feb 28 17:18:41.979 PCTime: DHCP transaction id: 172F
000222: *Feb 28 17:18:41.979 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000223: *Feb 28 17:18:41.979 PCTime: Next timer fires after:
00:00:04
000224: *Feb 28 17:18:41.979 PCTime: Retry count: 3 Client-ID:
0015.c653.9062
000225: *Feb 28 17:18:41.979 PCTime: Client-ID hex dump:
0015C6539062
000226: *Feb 28 17:18:41.979 PCTime: Hostname: cisco871
000227: *Feb 28 17:18:41.979 PCTime: DHCP: SDiscover: sending 277 byte
length DHCP packet
000228: *Feb 28 17:18:41.979 PCTime: DHCP: SDiscover 277 bytes
000229: *Feb 28 17:18:41.979 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
000230: *Feb 28 17:18:45.979 PCTime: DHCP: QScan: Timed out Selecting
state%Unknown DHCP problem.. No allocation possible
--More--  000231: *Feb 28 17:18:55.359
PCTime: DHCP: Waiting for 5 seconds on interface FastEthernet4
000232: *Feb 28 17:19:00.359 PCTime: DHCP: Try 2 to acquire address for
FastEthernet4
000233: *Feb 28 17:19:00.359 PCTime: DHCP: allocate request
000234: *Feb 28 17:19:00.359 PCTime: DHCP: zapping entry in DHC_PURGING
state for Fa4
000235: *Feb 28 17:19:00.359 PCTime: DHCP: deleting entry 829CB158
0.0.0.0 from list
000236: *Feb 28 17:19:00.363 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000237: *Feb 28 17:19:00.363 PCTime: Temp sub net mask: 0.0.0.0
000238: *Feb 28 17:19:00.363 PCTime: DHCP Lease server: 0.0.0.0,
state: 9 Purging
000239: *Feb 28 17:19:00.363 PCTime: DHCP transaction id: 172F
000240: *Feb 28 17:19:00.363 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000241: *Feb 28 17:19:00.363 PCTime: Next timer fires after:
00:00:26
000242: *Feb 28 17:19:00.363 PCTime: Retry count: 0 Client-ID:
0015.c653.9062
000243: *Feb 28 17:19:00.363 PCTime: Client-ID hex dump:
0015C6539062
000244: *Feb 28 17:19:00.363 PCTime: Hostname: cisco871
000245: *Feb 28 17:19:00.363 PCTime: DHCP: new entry. add to queue,
interface FastEthernet4
--More--  000246: *Feb 28 17:19:00.363
PCTime: DHCP: SDiscover attempt # 1 for entry:
000247: *Feb 28 17:19:00.363 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000248: *Feb 28 17:19:00.363 PCTime: Temp sub net mask: 0.0.0.0
000249: *Feb 28 17:19:00.363 PCTime: DHCP Lease server: 0.0.0.0,
state: 1 Selecting
000250: *Feb 28 17:19:00.363 PCTime: DHCP transaction id: 1730
000251: *Feb 28 17:19:00.363 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000252: *Feb 28 17:19:00.363 PCTime: Next timer fires after:
00:00:04
000253: *Feb 28 17:19:00.363 PCTime: Retry count: 1 Client-ID:
0015.c653.9062
000254: *Feb 28 17:19:00.363 PCTime: Client-ID hex dump:
0015C6539062
000255: *Feb 28 17:19:00.363 PCTime: Hostname: cisco871
000256: *Feb 28 17:19:00.363 PCTime: DHCP: SDiscover: sending 277 byte
length DHCP packet
000257: *Feb 28 17:19:00.363 PCTime: DHCP: SDiscover 277 bytes
000258: *Feb 28 17:19:00.363 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
000259: *Feb 28 17:19:03.979 PCTime: DHCP: SDiscover attempt # 2 for
entry:
000260: *Feb 28 17:19:03.979 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000261: *Feb 28 17:19:03.979 PCTime: Temp sub net mask: 0.0.0.0
--More--  000262: *Feb 28 17:19:03.979
PCTime: DHCP Lease server: 0.0.0.0, state: 1 Selecting
000263: *Feb 28 17:19:03.979 PCTime: DHCP transaction id: 1730
000264: *Feb 28 17:19:03.979 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000265: *Feb 28 17:19:03.979 PCTime: Next timer fires after:
00:00:04
000266: *Feb 28 17:19:03.979 PCTime: Retry count: 2 Client-ID:
0015.c653.9062
000267: *Feb 28 17:19:03.979 PCTime: Client-ID hex dump:
0015C6539062
000268: *Feb 28 17:19:03.979 PCTime: Hostname: cisco871
000269: *Feb 28 17:19:03.979 PCTime: DHCP: SDiscover: sending 277 byte
length DHCP packet
000270: *Feb 28 17:19:03.979 PCTime: DHCP: SDiscover 277 bytes
000271: *Feb 28 17:19:03.979 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
000272: *Feb 28 17:19:04.799 PCTime: %DOT11-7-AUTH_FAILED: Station
000b.7d0b.0c60 Authentication failed
000273: *Feb 28 17:19:07.715 PCTime: %DOT11-7-AUTH_FAILED: Station
000b.7d0b.0c60 Authentication failed
000274: *Feb 28 17:19:07.979 PCTime: DHCP: SDiscover attempt # 3 for
entry:
000275: *Feb 28 17:19:07.979 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000276: *Feb 28 17:19:07.979 PCTime: Temp sub net mask: 0.0.0.0
--More--  000277: *Feb 28 17:19:07.979
PCTime: DHCP Lease server: 0.0.0.0, state: 1 Selecting
000278: *Feb 28 17:19:07.979 PCTime: DHCP transaction id: 1730
000279: *Feb 28 17:19:07.979 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000280: *Feb 28 17:19:07.979 PCTime: Next timer fires after:
00:00:04
000281: *Feb 28 17:19:07.979 PCTime: Retry count: 3 Client-ID:
0015.c653.9062
000282: *Feb 28 17:19:07.979 PCTime: Client-ID hex dump:
0015C6539062
000283: *Feb 28 17:19:07.979 PCTime: Hostname: cisco871
000284: *Feb 28 17:19:07.979 PCTime: DHCP: SDiscover: sending 277 byte
length DHCP packet
000285: *Feb 28 17:19:07.979 PCTime: DHCP: SDiscover 277 bytes
000286: *Feb 28 17:19:07.979 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
000287: *Feb 28 17:19:10.723 PCTime: %DOT11-7-AUTH_FAILED: Station
000b.7d0b.0c60 Authentication failed
000288: *Feb 28 17:19:11.979 PCTime: DHCP: QScan: Timed out Selecting
state
000289: *Feb 28 17:19:18.135 PCTime: DHCP: Release IPL called for
interface FastEthernet4 in state 9
000290: *Feb 28 17:19:18.135 PCTime: RAC: DHCP stopped on interface
FastEthernet4
000291: *Feb 28 17:19:20.135 PCTime: %LINK-5-CHANGED: Interface
FastEthernet4, changed state to administratively down
--More--  000292: *Feb 28 17:19:21.135
PCTime: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet4,
changed state to down
000293: *Feb 28 17:19:22.791 PCTime: DHCP: DHCP client process started:
10
000294: *Feb 28 17:19:22.791 PCTime: RAC: Starting DHCP discover on
FastEthernet4
000295: *Feb 28 17:19:22.791 PCTime: DHCP: Try 1 to acquire address for
FastEthernet4
000296: *Feb 28 17:19:22.795 PCTime: DHCP: allocate request
000297: *Feb 28 17:19:22.795 PCTime: DHCP: zapping entry in DHC_PURGING
state for Fa4
000298: *Feb 28 17:19:22.795 PCTime: DHCP: deleting entry 82053D6C
0.0.0.0 from list
000299: *Feb 28 17:19:22.795 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000300: *Feb 28 17:19:22.795 PCTime: Temp sub net mask: 0.0.0.0
000301: *Feb 28 17:19:22.795 PCTime: DHCP Lease server: 0.0.0.0,
state: 9 Purging
000302: *Feb 28 17:19:22.795 PCTime: DHCP transaction id: 1730
000303: *Feb 28 17:19:22.795 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000304: *Feb 28 17:19:22.795 PCTime: Next timer fires after:
00:00:21
000305: *Feb 28 17:19:22.795 PCTime: Retry count: 0 Client-ID:
0015.c653.9062
--More--  000306: *Feb 28 17:19:22.795
PCTime: Client-ID hex dump: 0015C6539062
000307: *Feb 28 17:19:22.795 PCTime: Hostname: cisco871
000308: *Feb 28 17:19:22.795 PCTime: DHCP: new entry. add to queue,
interface FastEthernet4
000309: *Feb 28 17:19:22.795 PCTime: DHCP: SDiscover attempt # 1 for
entry:
000310: *Feb 28 17:19:22.799 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000311: *Feb 28 17:19:22.799 PCTime: Temp sub net mask: 0.0.0.0
000312: *Feb 28 17:19:22.799 PCTime: DHCP Lease server: 0.0.0.0,
state: 1 Selecting
000313: *Feb 28 17:19:22.799 PCTime: DHCP transaction id: 1300
000314: *Feb 28 17:19:22.799 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000315: *Feb 28 17:19:22.799 PCTime: Next timer fires after:
00:00:04
000316: *Feb 28 17:19:22.799 PCTime: Retry count: 1 Client-ID:
0015.c653.9062
000317: *Feb 28 17:19:22.799 PCTime: Client-ID hex dump:
0015C6539062
000318: *Feb 28 17:19:22.799 PCTime: Hostname: cisco871
000319: *Feb 28 17:19:22.799 PCTime: DHCP: SDiscover: sending 277 byte
length DHCP packet
000320: *Feb 28 17:19:22.799 PCTime: DHCP: SDiscover 277 bytes

 

The DHCP debug showsthat the 871W is sending DHCP Discovery messages
and not receiving any response.


What is the MAC address for the Dlink router that you used previously ?

What is the model number of the Dlink router


Try
conf t
interface FastEthernet 0/0

! mac-address format is 12 hex digits hhhh.hhh.hhhh

! mac-address <place MAC address of old SOHO router>

mac-address hhhh.hhhh.hhhh
end wri mem

disconnect cable to fast 0/0 and then reconnect

 

1. Please post the output of "show version"


2. Post your current config


3. Capture configuring and using IP address you used previously on
the Fastethernet 4 (outside) interface

enable
conf t
int fa 4
ip address x.x.x.x m.m.m.m
exit

wri mem

clear counter fa 4

ping y.y.y.y ! where y.y.y.y is the COX upstream router

sh ip arp y.y.y.y

sh int fa 4

 

For an overview of the DHCP packets that should be exchanged between
the Cisco 871W and the COX DHCP server, see
web.syr.edu/~djmolta/ist452/ch_08.ppt

In the debug trace once DHCP is working proeprly you should see the
following packet
exchange :
1. DHCP Discovery --->
2. DHCP Offer <---
3. DHCP Request --->
4. DHCP Ack <---

What is in the debug trace currently is just retries of sending DHCP
Discovery packets and getting no DHCP response from COX

 

When you got your COX service did you have to register your PC or your
DLINK device with COX by sighing on to their web site ?

 

On your DLINK router did you use the "Clone MAC" button?

see

http://support.dlink.com/faq/print.asp?productid=428

 

The problem I see with any question of the old router's MAC being the
issue, is that I am now online by statically assigning the IP address
received via DHCP to the DLink, on the Cisco. In fact, the DLink is
now dead, so the only way I am able to get online is to statically
assign that IP to the Cisco. Kinda rules the MAC address out, no?



Output of commands:

show ru
cisco871#show running-config
Building configuration...

Current configuration : 4946 bytes
!
version 12.3
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service sequence-numbers
!
hostname cisco871
!
boot-start-marker
boot-end-marker
!
logging buffered 10000 debugging
no logging console
enable secret 5 $1$NeSs$DSY2bKyVqOJN1L79VeRVc0
!
username admin privilege 15 secret 5 $1$sw3n$xgQc7G3SBHFK5vtmYTTSY0
clock timezone PCTime -8
--More--  clock summer-time PCTime date Apr 6
2003 2:00 Oct 26 2003 2:00
no aaa new-model
ip subnet-zero
ip cef
ip dhcp excluded-address 192.168.0.1 192.168.0.49
!
ip dhcp pool sdm-pool1
import all
network 192.168.0.0 255.255.255.0
dns-server 4.2.2.2
default-router 192.168.0.3
!
!
ip inspect name DEFAULT100 cuseeme
ip inspect name DEFAULT100 ftp
ip inspect name DEFAULT100 h323
ip inspect name DEFAULT100 icmp
ip inspect name DEFAULT100 netshow
ip inspect name DEFAULT100 rcmd
ip inspect name DEFAULT100 realaudio
ip inspect name DEFAULT100 rtsp
ip inspect name DEFAULT100 esmtp
ip inspect name DEFAULT100 sqlnet
--More--  ip inspect name DEFAULT100
streamworks
ip inspect name DEFAULT100 tftp
ip inspect name DEFAULT100 tcp
ip inspect name DEFAULT100 udp
ip inspect name DEFAULT100 vdolive
ip tcp synwait-time 10
ip domain name yourdomain.com
ip name-server 4.2.2.2
ip ssh time-out 60
ip ssh authentication-retries 2
no ftp-server write-enable
!
!
!
!
!
bridge irb
!
!
interface FastEthernet0
no ip address
no cdp enable
!
--More--  interface FastEthernet1
no ip address
no cdp enable
!
interface FastEthernet2
no ip address
no cdp enable
!
interface FastEthernet3
no ip address
no cdp enable
!
interface FastEthernet4
description $FW_OUTSIDE$$ETH-WAN$$ES_WAN$
ip address 68.6.120.REMOVED 255.255.252.0
ip access-group 101 in
ip inspect DEFAULT100 out
ip nat outside
ip virtual-reassembly
ip route-cache flow
duplex auto
speed auto
no cdp enable
--More--  !
interface Dot11Radio0
no ip address
!
encryption key 1 size 40bit 7 XXXXXXXXXX transmit-key
encryption mode wep mandatory
!
ssid donotconnect
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
station-role root
no dot11 extension aironet
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
!
--More--  interface Vlan1
description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$$FW_INSIDE$
no ip address
bridge-group 1
!
interface BVI1
description $ES_LAN$$FW_INSIDE$
ip address 192.168.0.3 255.255.255.0
ip access-group 100 in
ip nat inside
ip virtual-reassembly
ip tcp adjust-mss 1452
!
ip classless
ip route 0.0.0.0 0.0.0.0 68.6.120.1
!
ip http server
ip http authentication local
ip http secure-server
ip http timeout-policy idle 5 life 86400 requests 10000
ip nat inside source list 1 interface FastEthernet4 overload
ip nat inside source static tcp 192.168.0.99 XXXX interface
FastEthernet4 XXXX
!
--More--  logging trap debugging
access-list 1 remark INSIDE_IF=BVI1
access-list 1 remark SDM_ACL Category=2
access-list 1 permit 192.168.0.0 0.0.0.255
access-list 100 remark auto-generated by Cisco SDM Express firewall
configuration
access-list 100 remark SDM_ACL Category=1
access-list 100 deny ip host 255.255.255.255 any
access-list 100 deny ip 127.0.0.0 0.255.255.255 any
access-list 100 permit ip any any
access-list 101 remark auto-generated by Cisco SDM Express firewall
configuration
access-list 101 remark SDM_ACL Category=1
access-list 101 permit tcp any host 68.6.120.REMOVED eq www
access-list 101 permit udp host 4.2.2.2 eq domain any
access-list 101 deny ip 192.168.0.0 0.0.0.255 any
access-list 101 permit icmp any any echo-reply
access-list 101 permit icmp any any time-exceeded
access-list 101 permit icmp any any unreachable
access-list 101 deny ip 10.0.0.0 0.255.255.255 any
access-list 101 deny ip 172.16.0.0 0.15.255.255 any
access-list 101 deny ip 192.168.0.0 0.0.255.255 any
access-list 101 deny ip 127.0.0.0 0.255.255.255 any
--More--  access-list 101 deny ip host
255.255.255.255 any
access-list 101 deny ip any any
access-list 701 permit 000e.3b04.a26c 0000.0000.0000
access-list 701 permit 000b.7d0b.0c60 0000.0000.0000
access-list 701 deny 0000.0000.0000 ffff.ffff.ffff
no cdp run
!
control-plane
!
bridge 1 protocol ieee
bridge 1 route ip
banner login ^CAuthorized access only!
Disconnect IMMEDIATELY if you are not an authorized user!^C
!
line con 0
login local
no modem enable
transport preferred all
transport output telnet
line aux 0
login local
transport preferred all
transport output telnet
--More--  line vty 0 4
privilege level 15
login local
transport preferred all
transport input telnet ssh
transport output all
!
scheduler max-task-time 5000
scheduler allocate 4000 1000
scheduler interval 500
end

cisco871#  show version
Cisco IOS Software, C870 Software (C870-ADVSECURITYK9-M), Version
12.3(8)YI2, RELEASE SOFTWARE (fc1)
Synched to technology version 12.3(10.3)T2

ROM: System Bootstrap, Version 12.3(8r)YI, RELEASE SOFTWARE
ROM: Cisco IOS Software, C870 Software (C870-ADVSECURITYK9-M), Version
12.3(8)YI2, RELEASE SOFTWARE (fc1)

cisco871 uptime is 12 hours, 23 minutes
System returned to ROM by power-on
System image file is "flash:c870-advsecurityk9-mz.123-8.YI2.bin"



Cisco 871W (MPC8272) processor (revision 0x100) with 118784K/12288K
bytes of memory.
MPC8272 CPU Rev: Part Number 0xC, Mask Number 0x10
5 FastEthernet interfaces
1 802.11 Radio
128K bytes of non-volatile configuration memory.
24576K bytes of processor board System flash (Intel Strataflash)

Configuration register is 0x2102

cisco871#ping 68.6.120.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 68.6.120.1, timeout is 2 seconds:
!.!.!
Success rate is 60 percent (3/5), round-trip min/avg/max = 12/12/12 ms
cisco871#

 

On your DLINK router did you use the "Clone MAC" button?

No, I had never used this feature.

Nope

I think I should try using a local DHCP server to see if the device
gets an IP from it. However, even if it does, I still won't know how
to proceed with the problem, since the ISP has already told me that
they don't reset anything on their end when a new router is in place on
my end . . .

 

Well, it won't get an IP using DHCP from a local server either . . .

------------


sow  how log
Syslog logging: enabled (0 messages dropped, 2 messages rate-limited,
0 flushes, 0 overruns, xml disabled, filtering
disabled)
Console logging: disabled
Monitor logging: level debugging, 0 messages logged, xml disabled,
filtering disabled
Buffer logging: level debugging, 1884 messages logged, xml
disabled,
filtering disabled
Logging Exception size (4096 bytes)
Count and timestamp logging messages: disabled

No active filter modules.

Trap logging: level debugging, 1014 message lines logged
--More--  
Log Buffer (10000 bytes):
393036322D466134
000879: *Mar 1 06:47:55.792 PCTime: Hostname: cisco871
000880: *Mar 1 06:47:55.792 PCTime: DHCP: SDiscover: sending 295 byte
length DHCP packet
000881: *Mar 1 06:47:55.792 PCTime: DHCP: SDiscover 295 bytes
000882: *Mar 1 06:47:55.792 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
000883: *Mar 1 06:47:59.932 PCTime: DHCP: QScan: Timed out Selecting
state%Unknown DHCP problem.. No allocation possible
000884: *Mar 1 06:48:09.224 PCTime: DHCP: Waiting for 10 seconds on
interface FastEthernet4
000885: *Mar 1 06:48:19.224 PCTime: DHCP: Try 3 to acquire address for
FastEthernet4
000886: *Mar 1 06:48:19.224 PCTime: DHCP: allocate request
000887: *Mar 1 06:48:19.224 PCTime: DHCP: zapping entry in DHC_PURGING
state for Fa4
000888: *Mar 1 06:48:19.224 PCTime: DHCP: deleting entry 8238A634
0.0.0.0 from list
000889: *Mar 1 06:48:19.228 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000890: *Mar 1 06:48:19.228 PCTime: Temp sub net mask: 0.0.0.0
--More--  000891: *Mar 1 06:48:19.228
PCTime: DHCP Lease server: 0.0.0.0, state: 9 Purging
000892: *Mar 1 06:48:19.228 PCTime: DHCP transaction id: 1F68
000893: *Mar 1 06:48:19.228 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000894: *Mar 1 06:48:19.228 PCTime: Next timer fires after:
00:00:21
000895: *Mar 1 06:48:19.228 PCTime: Retry count: 0 Client-ID:
cisco-0015.c653.9062-Fa4
000896: *Mar 1 06:48:19.228 PCTime: Client-ID hex dump:
636973636F2D303031352E633635332E
000897: *Mar 1 06:48:19.228 PCTime:
393036322D466134
000898: *Mar 1 06:48:19.228 PCTime: Hostname: cisco871
000899: *Mar 1 06:48:19.228 PCTime: DHCP: new entry. add to queue,
interface FastEthernet4
000900: *Mar 1 06:48:19.228 PCTime: DHCP: SDiscover attempt # 1 for
entry:
000901: *Mar 1 06:48:19.228 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000902: *Mar 1 06:48:19.228 PCTime: Temp sub net mask: 0.0.0.0
000903: *Mar 1 06:48:19.228 PCTime: DHCP Lease server: 0.0.0.0,
state: 1 Selecting
000904: *Mar 1 06:48:19.228 PCTime: DHCP transaction id: 1F69
000905: *Mar 1 06:48:19.228 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
--More--  000906: *Mar 1 06:48:19.228
PCTime: Next timer fires after: 00:00:04
000907: *Mar 1 06:48:19.228 PCTime: Retry count: 1 Client-ID:
cisco-0015.c653.9062-Fa4
000908: *Mar 1 06:48:19.228 PCTime: Client-ID hex dump:
636973636F2D303031352E633635332E
000909: *Mar 1 06:48:19.228 PCTime:
393036322D466134
000910: *Mar 1 06:48:19.232 PCTime: Hostname: cisco871
000911: *Mar 1 06:48:19.232 PCTime: DHCP: SDiscover: sending 295 byte
length DHCP packet
000912: *Mar 1 06:48:19.232 PCTime: DHCP: SDiscover 295 bytes
000913: *Mar 1 06:48:19.232 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
000914: *Mar 1 06:48:22.932 PCTime: DHCP: SDiscover attempt # 2 for
entry:
000915: *Mar 1 06:48:22.932 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000916: *Mar 1 06:48:22.932 PCTime: Temp sub net mask: 0.0.0.0
000917: *Mar 1 06:48:22.932 PCTime: DHCP Lease server: 0.0.0.0,
state: 1 Selecting
000918: *Mar 1 06:48:22.932 PCTime: DHCP transaction id: 1F69
000919: *Mar 1 06:48:22.932 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000920: *Mar 1 06:48:22.932 PCTime: Next timer fires after:
00:00:04
000921: *Mar 1 06:48:22.932 PCTime: Retry count: 2 Client-ID:
cisco-0015.c653.9062-Fa4
--More--  000922: *Mar 1 06:48:22.932
PCTime: Client-ID hex dump: 636973636F2D303031352E633635332E
000923: *Mar 1 06:48:22.932 PCTime:
393036322D466134
000924: *Mar 1 06:48:22.932 PCTime: Hostname: cisco871
000925: *Mar 1 06:48:22.932 PCTime: DHCP: SDiscover: sending 295 byte
length DHCP packet
000926: *Mar 1 06:48:22.932 PCTime: DHCP: SDiscover 295 bytes
000927: *Mar 1 06:48:22.932 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
000928: *Mar 1 06:48:26.932 PCTime: DHCP: SDiscover attempt # 3 for
entry:
000929: *Mar 1 06:48:26.932 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000930: *Mar 1 06:48:26.932 PCTime: Temp sub net mask: 0.0.0.0
000931: *Mar 1 06:48:26.932 PCTime: DHCP Lease server: 0.0.0.0,
state: 1 Selecting
000932: *Mar 1 06:48:26.932 PCTime: DHCP transaction id: 1F69
000933: *Mar 1 06:48:26.932 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000934: *Mar 1 06:48:26.932 PCTime: Next timer fires after:
00:00:04
000935: *Mar 1 06:48:26.932 PCTime: Retry count: 3 Client-ID:
cisco-0015.c653.9062-Fa4
000936: *Mar 1 06:48:26.932 PCTime: Client-ID hex dump:
636973636F2D303031352E633635332E
--More--  000937: *Mar 1 06:48:26.932
PCTime: 393036322D466134
000938: *Mar 1 06:48:26.932 PCTime: Hostname: cisco871
000939: *Mar 1 06:48:26.932 PCTime: DHCP: SDiscover: sending 295 byte
length DHCP packet
000940: *Mar 1 06:48:26.932 PCTime: DHCP: SDiscover 295 bytes
000941: *Mar 1 06:48:26.932 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
000942: *Mar 1 06:48:30.932 PCTime: DHCP: QScan: Timed out Selecting
state%Unknown DHCP problem.. No allocation possible
000943: *Mar 1 06:48:39.712 PCTime: DHCP: Waiting for 15 seconds on
interface FastEthernet4
000944: *Mar 1 06:48:54.712 PCTime: DHCP: Try 4 to acquire address for
FastEthernet4
000945: *Mar 1 06:48:54.712 PCTime: DHCP: allocate request
000946: *Mar 1 06:48:54.716 PCTime: DHCP: zapping entry in DHC_PURGING
state for Fa4
000947: *Mar 1 06:48:54.716 PCTime: DHCP: deleting entry 8238A634
0.0.0.0 from list
000948: *Mar 1 06:48:54.716 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000949: *Mar 1 06:48:54.716 PCTime: Temp sub net mask: 0.0.0.0
000950: *Mar 1 06:48:54.716 PCTime: DHCP Lease server: 0.0.0.0,
state: 9 Purging
--More--  000951: *Mar 1 06:48:54.716
PCTime: DHCP transaction id: 1F69
000952: *Mar 1 06:48:54.716 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000953: *Mar 1 06:48:54.716 PCTime: Next timer fires after:
00:00:16
000954: *Mar 1 06:48:54.716 PCTime: Retry count: 0 Client-ID:
cisco-0015.c653.9062-Fa4
000955: *Mar 1 06:48:54.716 PCTime: Client-ID hex dump:
636973636F2D303031352E633635332E
000956: *Mar 1 06:48:54.716 PCTime:
393036322D466134
000957: *Mar 1 06:48:54.716 PCTime: Hostname: cisco871
000958: *Mar 1 06:48:54.716 PCTime: DHCP: new entry. add to queue,
interface FastEthernet4
000959: *Mar 1 06:48:54.716 PCTime: DHCP: SDiscover attempt # 1 for
entry:
000960: *Mar 1 06:48:54.716 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000961: *Mar 1 06:48:54.716 PCTime: Temp sub net mask: 0.0.0.0
000962: *Mar 1 06:48:54.716 PCTime: DHCP Lease server: 0.0.0.0,
state: 1 Selecting
000963: *Mar 1 06:48:54.716 PCTime: DHCP transaction id: 1F6A
000964: *Mar 1 06:48:54.716 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000965: *Mar 1 06:48:54.716 PCTime: Next timer fires after:
00:00:04
000966: *Mar 1 06:48:54.716 PCTime: Retry count: 1 Client-ID:
cisco-0015.c653.9062-Fa4
--More--  000967: *Mar 1 06:48:54.716
PCTime: Client-ID hex dump: 636973636F2D303031352E633635332E
000968: *Mar 1 06:48:54.720 PCTime:
393036322D466134
000969: *Mar 1 06:48:54.720 PCTime: Hostname: cisco871
000970: *Mar 1 06:48:54.720 PCTime: DHCP: SDiscover: sending 295 byte
length DHCP packet
000971: *Mar 1 06:48:54.720 PCTime: DHCP: SDiscover 295 bytes
000972: *Mar 1 06:48:54.720 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
000973: *Mar 1 06:48:57.932 PCTime: DHCP: SDiscover attempt # 2 for
entry:
000974: *Mar 1 06:48:57.932 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000975: *Mar 1 06:48:57.932 PCTime: Temp sub net mask: 0.0.0.0
000976: *Mar 1 06:48:57.932 PCTime: DHCP Lease server: 0.0.0.0,
state: 1 Selecting
000977: *Mar 1 06:48:57.932 PCTime: DHCP transaction id: 1F6A
000978: *Mar 1 06:48:57.932 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000979: *Mar 1 06:48:57.932 PCTime: Next timer fires after:
00:00:04
000980: *Mar 1 06:48:57.932 PCTime: Retry count: 2 Client-ID:
cisco-0015.c653.9062-Fa4
000981: *Mar 1 06:48:57.932 PCTime: Client-ID hex dump:
636973636F2D303031352E633635332E
--More--  000982: *Mar 1 06:48:57.932
PCTime: 393036322D466134
000983: *Mar 1 06:48:57.932 PCTime: Hostname: cisco871
000984: *Mar 1 06:48:57.932 PCTime: DHCP: SDiscover: sending 295 byte
length DHCP packet
000985: *Mar 1 06:48:57.932 PCTime: DHCP: SDiscover 295 bytes
000986: *Mar 1 06:48:57.932 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
000987: *Mar 1 06:49:01.932 PCTime: DHCP: SDiscover attempt # 3 for
entry:
000988: *Mar 1 06:49:01.932 PCTime: Temp IP addr: 0.0.0.0 for peer on
Interface: FastEthernet4
000989: *Mar 1 06:49:01.932 PCTime: Temp sub net mask: 0.0.0.0
000990: *Mar 1 06:49:01.932 PCTime: DHCP Lease server: 0.0.0.0,
state: 1 Selecting
000991: *Mar 1 06:49:01.932 PCTime: DHCP transaction id: 1F6A
000992: *Mar 1 06:49:01.932 PCTime: Lease: 0 secs, Renewal: 0
secs, Rebind: 0 secs
000993: *Mar 1 06:49:01.932 PCTime: Next timer fires after:
00:00:04
000994: *Mar 1 06:49:01.932 PCTime: Retry count: 3 Client-ID:
cisco-0015.c653.9062-Fa4
000995: *Mar 1 06:49:01.932 PCTime: Client-ID hex dump:
636973636F2D303031352E633635332E
000996: *Mar 1 06:49:01.932 PCTime:
393036322D466134
000997: *Mar 1 06:49:01.932 PCTime: Hostname: cisco871
--More--  000998: *Mar 1 06:49:01.932
PCTime: DHCP: SDiscover: sending 295 byte length DHCP packet
000999: *Mar 1 06:49:01.932 PCTime: DHCP: SDiscover 295 bytes
001000: *Mar 1 06:49:01.932 PCTime: B'cast on
FastEthernet4 interface from 0.0.0.0
001001: *Mar 1 06:49:05.932 PCTime: DHCP: QScan: Timed out Selecting
state
cisco871#

 

For testing purposes pull the access-list 101 from int fa 4 and try
getting a dhcp address from COX again

conf t
int fa 4
no ip access-group 101 in
exit

It is very common for cable ISP to use network 10.0.0.0 for theiur
internal infrastructure, so the DHCP server response may have a network
10 address.


Quite often the manufacturer's put the MAC address and the serial
number on an external label. A MAC address is 12 Hexadecimal digit.
D-LINK vendor code is 0080C8 which should be the first six digits of
the MAC address

Did you use a PC directly connected to the COX cable modem when you
first go the service or did you always have the D-LINK connected to the
COX cabl emodem?

Do you have a Windows PC that you can put a DHCP server on along with
Etherreal so we can get a packe trace of the DHCP packets that the
Cisco 871W is sending ?

For testing purposes pull the access-list from FA 4

 

You did it! It was the access-control that was the problem.

Thank you so much.

I tried to send some $ via paypal, but your email address is not
registered with them. How about an Amazon Gift Certificate?

-----------------
000045: *Mar 1 09:31:39.255 PCTime: %DHCP-6-ADDRESS_ASSIGN: Interface
FastEther
net4 assigned DHCP address 68.6.112.XX, mask 255.255.252.0, hostname
cisco871
-----------------

 

Glad it worked - that ia reward enough.

I had done a trace of DHCP on my sister-in-laws cable modem and the
DHCP server had a an IP address of 10.x.x.x So when I saw your
access-list, I wondered if that might be the issue.

 

Also see if you can use this form of default static route

ip route 0.0.0.0 0.0.0.0 dhcp

 

Will do.

Thanks a million.

 

BTW where did that access-list come from - did you hand-confgiure or
was it generated by SDM?

If it was SDM this should be reported to Cisco because it will cause
issues for others using SDM in a cable modem environment.

Cable operators use network 10 for as much of their infrastructure to
conserve their registered IP address space which is a crtiical resource
for them. So for example each cable modem get a network 10 address for
managment purposes.