Tech Support > Computer Hardware > Routers > Router configuration --- help
Router configuration --- help
Posted by Benson on September 10th, 2004


Hi,
I want to set up a internetworking environment:

The Network Topology:

Internet ----R1 ---LAN1---R2----IPLC----R3----LAN2


1. 3 routers: R1, R2, R3
2. R1 = ADSL Router, the LAN IP = 202.27.9.16/28
IP = 202.27.9.16/28
Default = 202.27.9.17
DNS = 202.27.9.19
3. R2 = IPLC Router, LAN IP = 202.27.9.18; WAN IP = 192.168.1.253/24
4. R3 = IPLC Router, WAN IP = 192.168.1.254/24, LAN IP = ??

How can I configure the R2 & R3, so that I can use the LAN1 IP Address
from the LAN2 ?

Thank you so much

Posted by Barry Margolin on September 10th, 2004


In article <f910ed55.0409092229.617d1d05@posting.google.com>,
bensonlei@yahoo.com.hk (Benson) wrote:

One way would be to subnet your address block. Use 202.27.9.16/29 on
LAN1, and 202.27.9.24/29 on LAN2. However, this would limit you to 4
client IPs on LAN1 and 5 client IPs on LAN2.

You could configure bridging over the IPLC, so that LAN1 and LAN2 would
be considered to be a single network.

You could use private IPs on LAN2 and configure NAT on R3 to translate
some LAN1 addresses to these IPs.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

Posted by Benson on September 10th, 2004


Hi, Barry,

Thank you for your help.

But since IP addresses are assigned by ISP, I do not want to lose any
one of them, how can I configure the R2 & R3 to be a bridge, so that I
can use the LAN1 IP addresses from LAN2 ?

Thank you



Barry Margolin <barmar@alum.mit.edu> wrote in message news:<barmar-25D775.03061710092004@comcast.dca.giganews.com>...


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