1. Home
  2. Cisco Systems
  3. DHCP on 2 ip blocks

DHCP on 2 ip blocks

Dear All, I have

1.1720 cisco router with 1 eth connects to ISP Internet 1 fastethernet card connects to LAN 192.168.0.1 1.Domain controller Windows 2003 server ip 192.168.0.2 1 Cisco Pix firewall on ip 192.168.80.1 2 2950 XL switches with 2 vlans

I want all machines to be authenticated by the domain controller which is a DHCP currently giving out IPs 192.168.0.10-250. The problem is a client on the LAN has to be on 192.168.80.X and have a gw of 192.168.80.1 to access services on the PIX. How can i configure all client machines to be on DHCP ( 192.168.0.x) and access the services on the PIX box (192.168.80.x)

Please assist

Reply to
alecky
Loading thread data ...

How about the topology here? You aren't making much sense?

If they all are on the wrong IPs, why do you have two different range of IPs and two VLANs? Why not just one?

Reply to
Doug McIntyre

Hi McIntyre, I want to join the 2 networks, Network 192.168.80.x has services to be accessed by network

192.168.0.x, the PIX on 80.1 only allows communication from any ip with source 80.x Keep in mind there is a DHCP server that allocates ips from 192.168.0.x network

192.168.0.x dhcp |----------|------------->client1

192.168.80.x | Server |-------------->client2

1720 cisco router

2 2950 cisco switch

Thanks

Reply to
alecky

Your drawing didn't come out very well, and I'm still not quite following the flow here.

It seems to me that you have two networks. The 192.168.0 network is where the servers and some clients are. The 192.168.80 network behind the PIX is where some other servers and some clients are?

The PIX should have NAT statements mapping the private 192.168.80 range into something in 192.168.0 range on its outside interface??

OR, the other way you are describing it, its like you expect the pix to have 192.168.80 on its outside, and 192.168.0 on its inside, which is also in use on the outside of the PIX for everything else? If so, you'll have to swap the networks on the PIX? The outside of the PIX must be in the same range as where client1 lives?

I'm sorry, I'm still not following exactly what is where.

Reply to
Doug McIntyre

The current topology is Network 1 I have 60 machines they get get IPs from a DHCP 192.168.0.x they all connect to 2 48 port cisco switch 2950XL and 1 1720 cisco router has two interfaces 1 to the internet the other to local LAN Network 2 has 4 servers with IPs 10.0.0.x a switch and cisco PIX firewall, the pix has 2 network interfaces 1 is GW for the servers and

192.168.80.x for the external network. Incase i want to access servers on network 2 I have to change the ips 192.168.0.x to 192.168.80.x with a GW of PIX outside interface. I want to join both networks. I do not want to keep on changing the addresses. As requested below is a show ver for 1720

Cisco IOS Software, C1700 Software (C1700-Y-M), Version 12.3(14)T1, RELEASE SOFTWARE (fc1) Technical Support:

formatting link
(c) 1986-2005 by Cisco Systems, Inc. Compiled Thu 31-Mar-05 13:40 by yiyan ROM: System Bootstrap, Version 12.2(7r)XM2, RELEASE SOFTWARE (fc1) gw-router uptime is 4 days, 20 hours, 5 minutes System returned to ROM by power-on System image file is "flash:c1700-y-mz.123-14.T1.bin" Cisco 1721 (MPC860P) processor (revision 0x500) with 56468K/9068K bytes of memory. Processor board ID FOC09181RTT (4115645989), with hardware revision

0000 MPC860P processor: part number 5, mask 2 1 Ethernet interface 1 FastEthernet interface 32K bytes of NVRAM. 32768K bytes of processor board System flash (Read/Write) Configuration register is 0x2102

Thanks

Reply to
alecky

Cabling-Design.com Forums website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.