Dynamic routing has the added advantage
of being able to evolve with your network as its topology changes. It can discover new
routes as they become available and redefine its table if links start to go down. Windows
Server 2008 supports Routing Information Protocol (RIP) version 2 as a dynamic routing
protocol for IPv4.
357 Chapter 11: Routing and Remote Access
Routing Information Protocol
RIP is a relatively easy-to-configure dynamic routing protocol. It works by configuring
routers to broadcast its list of known networks. A router accepts these messages and
adds a route to those networks in its own routing table. In RIPv1, these route announcements
are done on a periodic basis regardless of any changes in its known networks.
RIPv2 improves on RIP by multicasting as soon as any of its known routes change. Not
only does this improve performance by minimizing the network traffic RIP generates,
it also lets other routers update their routing information as soon as a change of route
has been detected. It also supports clear text username and passwords for preventing
unwanted changes to the routing table from unknown devices. The limitation to RIP is
that it can go only as far as 15 hops.
RIP also operates in one of two modes: periodic update mode and auto-static update
mode. In periodic update mode, updates are sent out on a periodic basic as defined by
the administrator.
Pages:
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400