Hello,
Sorry, I didn't answer the router question in my explanation of how DSL
data flows. With a simple DSL configuration the routing begins at the
redback. With multiple IPs and a customer router, routing takes place at
the customer prem and the ISP. We are currently using static IPs at
Pacific Bell Internet (PBI). Here's how the IP assignments would look.
IP: 192.168.1.34 (Obviously fake IPs)
Gateway: 192.168.1.254 (This gateway acts as the interface for the whole
C class)
Subnet: 255.255.255.0
The other 250ish people on your subnet share this same gateway.
Sometimes you'll find you can ping your gateway (ISP router), but can't
surf. This is usually due to a bad subnet mask or gateway address. Each
C class is routed to the next hop and so forth.
Multiple IP customers will have 2 CIDR blocks (WAN /30 and LAN /29 up to
/24). In this scenario your LAN traffic is routed on site. The IPs are
also routed through the ISP router. This makes it possible to route to
internal servers you may have.
WAN Customer router serial IP: 192.168.1.200
WAN Gateway for router: 192.168.1.199
LAN Customer router ethernet interface: 192.168.1.30 (Also acts as
gateway for LAN)
LAN Customer workstation IPs 192.168.1.31 through 192.168.1.35 (/29
CIDR)
Hope this along with the data flow explanation help in learning more
about how DSL works.
Brian
[EMAIL PROTECTED]
>sorry, not trying to spread false info.
>
>where does the routing stop? I have a DSL modem. Does it stop at the
>modem, or at my ISP's gateway? Mostly just curious, but I have the feeling
>it's the gateway, in which case wouldn't other DSL users with non-routable
>IPs be able to see my traffic? When I boot my laptop into windows, other
>windows workgroups show up (from other DSL users I guess), but I'm not
>sure if this is even related to the routing of IPs.
>
>thanks
>charles
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