04-14-2004 11:42 PM - edited 03-02-2019 03:00 PM
I have to test a network today that is working with DHCP. There is a DHCP server on another location that works fine. I configured a router on another locations (cisco 828) with the following commands:
ip helper address 192.168.1.3 (dhcp server)
ip dhcp-server 192.168.1.3
I've looked things up on the Internet and according to a lot of people this should work. So that the other location (behind the 828 router) can work with DHCP adresses given by the server on yet the other location.
I can ping the server from any location so the connection is just fine. But i need to be sure that i'm not forgetting anything. Is this going to work?
Or do i need to configure another router between the server and the router on the other location?
Well i hope you can help me....fast...thnx!
04-14-2004 11:57 PM
Hello,
the command:
ip helper address 192.168.1.3
is only needed on the router when your DHCP clients are not on the same segment. If you have another intermediate router in between your two locations, configure the ip helper command on that router as well.
The command:
ip dhcp-server 192.168.1.3
is used for DHCP clients on your local segment.
Let me know if that is not clear...
HTH,
GP
04-15-2004 12:50 AM
Thnx for a fast reply!
So if i get it right(got some english problems because..well...im not english). But if i get it right the ip helper command is for DHCP clients on the same subnet? Then i need to use that command to make it work because all clients are on the same subnet and the servers are too.
dhcp server command...for a local LAN? Don't really get that.
Here's some more info:
2 routers, some workstations, and 1 DHCP server.
The DHCP server(192.168.1.3) is connected to a router (192.168.1.10). That router goes through epacity to another cisco router (192.168.5.10). That router is connected to a few 3com switches and the workstations are connected to those switches.
On the 192.168.5.10 router i've done these things:
ip helper-address 192.168.1.3
and
ip dhcp-server 192.168.1.3
On the other router i've only putted the following command(192.168.1.10)
ip dhcp-server 192.168.1.3
Can the workstations recieve a DHCP adresses now?
04-15-2004 01:03 AM
Hello,
on the router with IP address 192.168.1.10 you need:
ip dhcp-server 192.168.1.3
ip helper-address 192.168.1.3 (on the interface connected to your remote location)
and on the router with IP address 192.168.5.10 you need only the command:
ip helper-address 192.168.1.3 (on thhe Ethernet or FastEthernet interface where your clients are connected to).
HTH,
GP
04-15-2004 01:08 AM
yeah! that's an answer i need!
Well...im gonna test it, hopefully it works! Thank you.
04-15-2004 01:18 AM
Just to be sure, here's the configuration of the 192.168.5.10 router:
Current configuration : 1458 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log uptime
!
hostname 2316RX-40
!
no logging buffered
!
ip subnet-zero
!
ip cef
!
!
!
interface Ethernet0
ip address 192.168.5.10 255.255.255.0
ip helper-address 192.168.1.3
no cdp enable
hold-queue 32 in
hold-queue 100 out
!
interface ATM0
no ip address
no atm ilmi-keepalive
pvc 2/32
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
dsl equipment-type CPE
dsl operating-mode GSHDSL symmetric annex B
dsl linerate AUTO
!
interface Dialer0
ip unnumbered Ethernet0
no ip proxy-arp
encapsulation ppp
dialer pool 1
dialer-group 1
no cdp enable
ppp pap refuse
ppp ipcp address accept
!
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer0
no ip http server
!
!
dialer-list 1 protocol ip permit
no cdp run
!
line con 0
exec-timeout 0 0
password cisco
login
stopbits 1
line vty 0 4
exec-timeout 30 0
login
length 0
!
scheduler max-task-time 5000
end
Half of this i don't understand, im still learning. But is this router configured right?
04-15-2004 02:50 AM
Hello,
that should work. Let me know after you have tested if there are still problems.
Regards,
GP
04-26-2004 03:25 AM
It worked! Thank you so much GP!
DHCP server & helper address on one router, and on another a helper address...works super!
04-26-2004 04:37 AM
Hello,
great that you got it working. Have fun !
GP
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