Re: (PM) OSPF and assymetric routing

Roy (garlic@garlic.com)
Tue, 24 Feb 1998 09:05:25 -0800

Why is the dialup customer listening to routing from you? The routing
decision to either send the data to cable modem or to the analog modem
is made at the customer's end, not yours. Routing decisions are based
on the destination address not the source. The only time the customer's
ip address is the destination is when it SHOULD go down the analog path.

Roy

PS. Yes, you can route based on the destination/source pair but that's
policy based routing and far beyond the simple scope of this scenario.

Scott Rosen wrote:
>
> We are trying to implement OSPF on our network and have run into a
> bit of a snag. In addition to our regular dialup pool, we are also
> running a cablemodem system that uses assymetric routing.
>
> The cablemodem customers dialup to our portmaster, and we assign
> them an IP address from a special pool. These addresses have been
> statically routed out to the cable headend, and then on to the cable
> system. So, from a customer point of view, all of their data goes
> *out* their analog modem, and it comes *in* via their cablemodem.
>
> This has been working fine with static routes. However, as soon as
> we turned on OSPF, the portmaster started announcing the route to
> the dialup customer, so the data comes back in via their analog modem
> (instead of being bounced out to the cable office).
>
> Is there a way to tell the portmaster to *NOT* announce certain
> addresses using OSPF? Or to have it announce a lower priority? Any
> suggestions?
>
> TIA,
>
> Scott Rosen
> Frazier Mountain Internet Service
> -
> To unsubscribe, email 'majordomo@livingston.com' with
> 'unsubscribe portmaster-users' in the body of the message.
> Searchable list archive: <URL:http://www.livingston.com/Tech/archive/>
-
To unsubscribe, email 'majordomo@livingston.com' with
'unsubscribe portmaster-users' in the body of the message.
Searchable list archive: <URL:http://www.livingston.com/Tech/archive/>