i am new to networking and have the following question .
It a serial interface (int s0) of cisco router in a company is used for both internet connection and Frame Relay links (says, total 2 FR links) that used for communication with its branch offices, then how to config this interface??
does it look like as follow:
(interface ethernet 0 is for LAN users that have to surf internet . Some statements for NAT are ignored)
apart from the NAT configuration which is incomplete (you need to define the addresses that need to get translated, and a pool of to-be-assigned addresses, or an overload statement), you also need to put two more static routes in your config, one for each branch office, because with the default route that is in there, everything will be routed to the Internet. If you are using network 192.168.0.0 on your network, you have to include the statement ´ip subnet-zero´ in your router configuration. Also, the IP addresses on your Frame Relay subinterfaces have a 31-bit mask, this needs to be 30-bit mask. Here is what your config should look like, according to me :)
interface ethernet 0
ip nat inside
description to lan
ip address 192.168.0.1
interface Serial 0
no ip address
interface serial 0.1
no shutdown description to internet
ip nat outside
ip address a.b.c.d w.x.y.z
!total 2 Frame-relay Links
interface serial 0.2 point-to-point
description to branch office a
ip address 192.168.1.1 255.255.255.252
frame-relay interface-dlci 16
interface serial 0.3 point-to-point
description to branch office b
ip address 192.168.2.1 255.255.255.252
frame-relay interface-dlci 17
ip route 0.0.0.0 0.0.0.0 serial 0.1
ip route 192.168.1.0 0.0.0.255 interface serial 0.2
ip route 192.168.2.0 0.0.0.255 interface serial 0.3
access-list 1 permit 192.168.0.0 0.0.0.255
ip nat inside source list 1 interface serial 0.1 overload
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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