09-27-2004 10:03 AM - edited 03-02-2019 06:47 PM
Hi,
I am having some issues with BOOTP/DHCP forward on a Cisco 1751 router (IOS (tm) C1700 Software (C1700-K8SY7-M), Version 12.2(4)T3, RELEASE SOFTWARE (fc3)).
I have set-up an ip helper-address on the LAN interface as there is no DHCP server at this site and as we want to keep DHCP centrally managed.
It is working for nearly everything but Windows XP clients, which reject the IP address.
The DHCP server is running Windows NT 4.0 (I have tried with a Windows 2003 server and the issue remains the same).
Below is the router config.
Has someone experienced a similar issue ?
Can you help ?
Many thanks,
Christophe.
=====================================================
Config:
------
! Last configuration change at 17:39:30 bst Mon Sep 27 2004
! NVRAM config last updated at 15:23:10 bst Mon Sep 27 2004
!
version 12.2
no service pad
service timestamps debug datetime localtime
service timestamps log datetime localtime
service password-encryption
!
hostname LONWEST-R-RLI01
!
boot system flash
logging buffered 4096 debugging
enable password 7 xxxxxxxxxx
!
username AAA password 7 xxxxxxxxx
memory-size iomem 20
clock timezone gmt 0
clock summer-time bst recurring
ip subnet-zero
!
!
ip ftp username router
ip ftp password 7 xxxxxxxxxx
ip domain-list housing21.co.uk
ip domain-name housing21.co.uk
ip name-server 10.1.1.11
ip name-server 10.1.10.18
!
ip ssh time-out 120
ip ssh authentication-retries 3
isdn switch-type basic-net3
!
crypto mib ipsec flowmib history tunnel size 200
crypto mib ipsec flowmib history failure size 200
!
!
!
interface FastEthernet0/0
ip address 10.10.1.1 255.255.0.0
ip broadcast-address 10.10.0.0
ip helper-address 10.1.10.1
speed auto
!
interface Serial0/0
description BEACONS Leased Line (NXGB2xxxxxx)
bandwidth 256
backup delay 0 300
backup interface Dialer1
ip unnumbered FastEthernet0/0
ip broadcast-address 0.0.0.0
priority-group 1
!
interface BRI1/0
no ip address
ip broadcast-address 0.0.0.0
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
ppp authentication chap
ppp multilink
!
interface Dialer1
description BEACONS ISDN Backup
ip unnumbered FastEthernet0/0
ip broadcast-address 0.0.0.0
encapsulation ppp
load-interval 30
dialer pool 1
dialer remote-name AAA
dialer string 01xxxxxxxxx
dialer load-threshold 150 either
dialer-group 1
priority-group 1
no cdp enable
ppp authentication chap
ppp multilink
!
router eigrp 1
network 10.10.0.0 0.0.255.255
auto-summary
no eigrp log-neighbor-changes
!
ip classless
ip forward-protocol udp 135
no ip http server
ip pim bidir-enable
!
priority-list 1 protocol ip high tcp 1494
priority-list 1 protocol ip high udp 1494
priority-list 1 protocol ip high tcp 1604
priority-list 1 protocol ip high udp 1604
priority-list 1 protocol ip normal
dialer-list 1 protocol ip permit
!
snmp-server community xxxxxx RO
snmp-server community xxxxxx RW
snmp-server location Housing 21 - LONWEST - 1st Floor - Back-Office (Systems and Finance Manager)
snmp-server contact Housing 21 Network Team
banner motd ^CLONWEST-R-RLI01^C
!
line con 0
session-timeout 3600
stopbits 1
line aux 0
password 7 xxxxxxxxxxxxxxxxxxxx
login
line vty 0 4
session-timeout 3600
password 7 xxxxxxxxxxxxxxxxxxxx
login
!
sntp server 10.1.10.18
end
09-27-2004 10:46 AM
Hello Christophe,
I might be totally off here, but I remember coming across this problem before, the issue is not with the router or the DHCP server, but with the client configuration. You need to enable NetBIOS over TCP on your XP client, here is how:
Click Start, click Control Panel, click Network and Internet Connections, and then click Network Connections.
Right-click the network connection that you want to configure, and then click Properties.
On the General tab (for a local area connection) or on the Networking tab (for all other connections), click Internet Protocol (TCP/IP), and then click Properties.
Click Advanced, click the WINS tab, and then click Enable NetBIOS over TCP/IP.
Note If the DHCP server provides the NetBIOS settings, you can click Default: Use NetBIOS setting from the DHCP server. If static IP address is used or the DHCP server does not provide NetBIOS setting, enable NetBIOS over TCP/IP.
Click OK two times, and then click Close.
Let me know if this makes a difference...
Regards,
Georg
09-28-2004 01:13 AM
Hi Georg,
Many thanks for your reply.
I will try this and let you know if it solve the issue.
Regards,
Christophe.
09-29-2004 03:10 AM
Hi Georg,
Many thanks for your help.
We have tried to enable NetBIOS over TCP/IP, but it does make any difference.
XP clients are still not accepting the DHCP settings forwarded by the router.
I have added the following command in the config and this seems to solve the issue:
ip dhcp limited-broadcast-address
Best regards,
Christophe
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