Frame Relay

Hi All,

I have been tasked to link our existing frame relay (between two offices), by adding a third office to the "loop".

The current IP Scheme is this

Site A has a IP Scheme of 192.168.32.XXX

Site B has a IP Scheme of 192.168.33.XXX

These two site have a Frame Relay between them, provided by the national Telco. There are two Cisco 2509 Routers between these site.

The thing i can't quite get to grips with is that when looking at the router config there is a third range 192.168.34.1. This seems to be the link between the two site via Frame Relay.

It is needed that once the third site is installed all should be able to see each other through route tables and subnetting.

What i need to know is the 192.168.34.1 isa that something that i need to also config on Site C and have there IP scheme at 192.168.35.XXX. Or do i need to have their IP Scheme as 192.168.35.1 and the link called encapulsated frame reply in the cisco config.

Can anyone please give me a bit of insite or a site where this info is explained. :confused:

Obviously your config should look something like this:

<code>
hostname Cisco2509-A
!
interface Ethernet 0
description connected to EthernetLAN-A
ip address 192.168.32.1 255.255.255.0
!
interface Serial 0
no ip address
encapsulation frame-relay
frame-relay lmi-type cisco
!
interface Serial 0.1 point-to-point
description connected to Cisco2509-B
ip address 192.168.34.1 255.255.255.252
frame-relay interface-dlci 101
</code>

the 192.168.34.x in serial0.1 is a transfer-network and if you want to set things up with Site C as they are with A&B you'll have to set up a transfer-network between A&C and B&C too...
After Site C is set up, your config on Router-A should possibly have an added entry like:
<code>
interface Serial 0.2 point-to-point
description connected to Cisco2509-C
ip address 192.168.34.5 255.255.255.252
frame-relay interface-dlci 201
</code>
underneath interface Serial 0.1 (watch that the 192.168.34.5 is in a different net than 192.168.34.1 as subnetting is set to /30 or .252 )


Try http://www.cisco.com/public/sw-center/sw-netmgmt.shtml to download the CiscoConfigmaker2.4 (link just didn't work... perhaps later or another one :( ) and and check/make easy (but not certified - don't rely on them!) configurations.

Also don't forget to include your new routes accordingly...

Hi Noone,

Thanks for the link, i am downloading it now.

What about this for a solution.

Site A and B stays the same.

Site C will have an IP Address scheme of 192.168.35.1 with the serial 0.1 set to 192.168.36.1 this thne gives me transpor back to site A. If i then add site AB transport 192.168.34.1 to route to 192.168.35.1 and add AC transport 192.168.34.1 so they can all talk.

Does this sort of sound right??

Quote:

---

Originally posted by CampbellD:

Site A and B stays the same.

Site C will have an IP Address scheme of 192.168.35.1 with the serial 0.1 set to 192.168.36.1 this thne gives me transpor back to site A. If i then add site AB transport 192.168.34.1 to route to 192.168.35.1 and add AC transport 192.168.34.1 (???) so they can all talk.

Does this sort of sound right??

---

I think you mean 192.168.36.1 for AC-transport... then it'll be allright!

If you want to have only one connection for C (the AC) then you'll have to make sure your routing is ok (in any other instance though too *grin*) as C can only communicate to B via A

For your paticular small problem, the config-maker is a good tool to find things out - but again: don't rely on it.