Hi,
I have a MPLS IP-VPN circuit DSL/ATM as following into code partition.
My service provider send an email to me that i must use the following modem:
Thomson TG605s for connecting to the above circuit and using any cisco 1800 or 2800 sieres router, So i have Cisco 1841 router with FE0/0 and FE0/1 ports.
as my service provider connection illustration diagram i must connect FE0/0 to DSL modem and connect FE0/1 to my LAN switch then configure FE0/0 as WAN interface with IP=172.31.148.174/30
and i configure FE0/1 as LAN interface with my LAN IP node ex. 192.168.60.1/24
my two questions are:
when i configure TG605s as PPPoA it needs an IP address for DSL/ATM interface, then i have only one IP from my service provider please any suggestion for using and configuring this modem?
How can i configure my cisco 1841 BGP?
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Ah, O.K. I was thinking Internet. Typically DSL connections are used for Internet access, not "private" network connections.
However as to the BGP configuration.
If the TG605 has the PPPoA connection defined to it, then the Cisco router would only be talking to it and thus it would need to distribute the routes to the TG605 only. Unless you have other routers connected to the TG605.
Now, if the TG605 is acting as a "transparent bridge" and the Cisco router is doing the PPPoA connection, then you need to know the upstream IP address that it will distribute the routes to.
So, is the TG605 going to be doing the PPPoA, in other words it will be acting as a router between your Cisco router and the next upstream router, or will the TG605 be transparent?
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by: giltjrPosted on 2009-01-01 at 07:54:25ID: 23275182
Unless either you missed something, or they missed giving you something, the outside interface (DSL/ATM) of the TG605 should be getting it IP address dynamically (DHCP) from the service provider.
Why do you want to configure BGP on the Cisco? As your Cisco device is only connected to you LAN and the TG605, you should not need any dynamic routing protocols setup, static routes will be fine. Further, if you only have one IP subnet on your LAN, all you would need is a single static route, the default route, pointing to the TG605.
I am assuming you have something like:
LAN <-- 192.168.60.0/24 --> (Fa0/1 - 1841 - Fa0/0) <-- 172.31.148.172.30 --> TG605 <-- DSL --> ISP
Unless you have more than one IP subnet within your network, you should only need one 1 route in the 1841 and that would be the default route pointing to 172.31.148.173.