Sunday, April 4, 2010


Just a quick review before I move on. By default RIP uses version 1. The algorithm used in version 1 was developed in the 1970s and is classful. To allow RIP to advertise subnet masks, you'll need to use:version 2

Now, RIP will automatically summarize any received routes, so before it would actually show individual subnets in the routing table, you'll have to use
no auto

Note that RIP will require you to enter classful addresses (it will correct you automatically in real-life but in certification simulations it would deduct your marks).

Routing is always a two way process. A ping can go one way, but you won't get replies if the packet does not know how to route back. Ping is actually used to test full two-way connectivity. A traceroute is used to find the entire way through, and the second final ping is always dropped.

To automatically propagate default routes, use:
default-information originate

Alternatively, you can use:
redistribute static

At this point, you would be able to route out into the internet. However, the internet would not know how to route back. (Besides, RFC1918 addresses are blocked) This is because of the lack of NAT. We will fully cover this in later articles.

No comments :

Post a Comment