From: jonatale@xxxxxxxxxxxxx
Date: Fri Dec 21 2001 - 01:03:59 GMT-3
"An IP routing protocol on R1 is required to get both static routes in the IP
routing table." -- ya, "static routing" is they protocol (its tranport layer is
the keyboard)
"If you enter two static routes for the same network and you
are not using a routing protocol, then the first static route goes in the
routing table. The second will replace the first in the routing table, if the
first goes away." -- ya, maybe on [old]FreeBSD, not Cisco
"All routes are static routes." -- nope, some are dynamic
"Many Cisco routers are used to route traffic without using routing protocols.
All routes are static routes." -- doubt it, name 2
are you a ccie? you must be a fast typist!
Don Rogers wrote:
> Many Cisco routers are used to route traffic without using routing protocols.
> All routes are static routes. Routes are not learned or advertised. However
,
> a routing protocol is required for load balancing.
>
> An IP routing protocol on R1 is required to get both static routes in the IP
> routing table. If you enter two static routes for the same network and you
> are not using a routing protocol, then the first static route goes in the
> routing table. The second will replace the first in the routing table, if th
e
> first goes away.
>
> The IP routing protocol performs the load balancing. No routing protocol,
> then no load balancing. When the routing protocol discovers that it no longe
r
> has a route to the next hop, it removes the route from the routing table.
>
> The default timeout on a Cisco router for an arp table is four hours.
>
> If you are not running a routing protocol between R1, R2, and R3, then it ma
y
> take a while for R1 to discover that R2 or R3 has gone away.
>
> a"vr4drvr ." wrote:
>
> > Here's a static routing question that I need answered. I do have
> > theories,
> > but I need a proof positive answer. Simple scenario.
> >
> > R2---10.1.1.0/24
> > R1----|
> > R3---10.1.1.0/24
> >
> > 3 routers are connected to an ethernet segment. R1 has 2 static routes
> > to
> > the 10.1.1.0/24 network pointing to the IP address of the next hop
> > ethernets
> > on R2 and R3, thereby providing load balancing and fault tolerance. My
> > question is... if an ethernet interface on R2 was to go down, how does
> > that
> > affect the routing from R1 to the 10.1.1.0 network? For instance, will
> > R1
> > drop half the traffic? How does the ARP cache on R1 impact routing, or
> > rather, how is routing impacted by the ARP cache? Will the static route
> >
> > through R2 get dropped so to speak?
> >
> > TIA.
> >
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