December 2005
Intermediate to advanced
1066 pages
33h 38m
English
Content preview from Understanding Linux Network InternalsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Routing Protocol Daemons
Routes can be inserted into the kernel routing tables from three main sources:
Static configuration via user commands (e.g., ip route, route)
Dynamic configuration via routing protocols such as Border Gateway Protocol (BGP), Exterior Gateway Protocol (EGP), and Open Shortest Path First (OSPF), implemented as user-space routing daemons
ICMP redirect messages received and processed by the kernel due to suboptimal configurations
We will cover the first source in Chapter 36, and we will see the third one later in this chapter. Let's take a look at the second source now, and in particular the routing daemons available for Linux systems. The details of their interaction with the kernel will be covered in Chapter 32. Here is a list of projects that are no longer maintained but are nevertheless interesting:
- Routed
The oldest Unix routing protocol daemon. It includes only the RIP protocol, both Versions 1 and 2 (see RFC 2453).
- GateD (http://www.gated.org)
Includes most of the routing protocols. It started as a research project by the Merit GateD Consortium, but its rights were later acquired by NextHop. The research version is no longer maintained.
- BIRD (http://bird.network.cz)
A project started at the Charles University in Prague. It supports the most common routing protocols.
The following is a list of routing protocol suites that are still maintained and deployed:
- Zebra (http://www.zebra.org)
Includes most of the routing protocols. It is already widely deployed and its mailing ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.