RE: QS: FIB and RIB: what is the difference

Hahahaha! That is awesome Salah!

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Ernest McCaleb
Sent: Friday, September 25, 2009 5:26 PM
To: Salah ElShekeil
Cc: Narbik Kocharians; ccielab_at_groupstudy.com
Subject: Re: QS: FIB and RIB: what is the difference

How dare Narbik offer you any assistance! What a bogus unprofessional and
underhanded way to promote his workbooks! My God, next thing you know one
of those guys from INE may chime in!!
 :-)

Ernest #21508

On Fri, Sep 25, 2009 at 5:14 PM, Salah ElShekeil
<salah.elshekeil_at_gmail.com>wrote:

> Hi Narbik,
>
>
>
> As usual great reply
>
>
>
> keep it up boss :)
>
>
>
> On Fri, Sep 25, 2009 at 10:01 PM, Tony Varriale
> <tvarriale_at_flamboyaninc.com>wrote:
>
> > It's actually very revelant as the info he is quoting is from systems
> > that's have the capability to download fib onto hardware/linecard.
> >
> > What you described is more of the foundation and is more accurate in a
> > base sense.
> >
> > You can't download fib to hardware that doesn't exist.
> >
> > Sent from my iPhone
> >
> > On Sep 25, 2009, at 12:30 PM, Narbik Kocharians <narbikk_at_gmail.com>
> > wrote:
> >
> > > When you look at RIB and FIB you have to think of the 2 major and
> > > most important components of routing:
> > >
> > > Control Plane
> > > Data Plane
> > > The control plane takes care of the routing information exchange,
> > > and in MPLS environment, label exchange between adjacent devices.
> > > What do we have and see in the control plane? Routing protocols,
> > > exchange of routing information, RIB (Routing Information Table) and
> > > once again in an MPLS environment you will also see a Label Exchange
> > > Protocol such as LDP.
> > >
> > > So therefore control plane builds a routing table or RIB based on
> > > the routing protocols.
> > > The control plane builds/populates 2 forwarding tables: a FIB (Which
> > > is built from the information in the RIB) and in MPLS networks an
> > > LFIB (Label Forwarding Information Base). These (FIB and LFIB) exist
> > > and work in the Data plane.
> > >
> > > The data Plane is simply a forwarding engine that is independent of
> > > the routing protocol or Label exchange protocol type; this Plane
> > > forwards packets to the appropriate interface based on the info
> > > found in the FIB or LFIB.
> > >
> > > So the way I envision it:
> > >
> > > You use a routing protocol to advertise routes upstreamb&b&and if
> > > any of the upstream routers need to connect to the advertised networ
> > > ks, they connect downstream toward the destination.
> > >
> > > Now this is a very brief and basic explanation of the RIB, FIB and
> > > LFIB.
> > >
> > > Now weather they are hardware based or software based I think is
> > > irrelevant when you look at different platforms.
> > >
> > >
> > > On Fri, Sep 25, 2009 at 9:24 AM, Tony Varriale <
> > tvarriale_at_flamboyaninc.com
> > > > wrote:
> > > That's making a poor assumption that the device you are speaking
> > > about is
> > > hardware based.
> > >
> > > More than half of people won't come in contact with those devices
> > > (with the
> > > exception of a 6500).
> > >
> > > tv
> > >
> > > -----Original Message-----
> > > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf
> > > Of
> > > Anthony Sequeira
> > > Sent: Friday, September 25, 2009 10:13 AM
> > > To: Syed Khalid Ali
> > > Cc: ccielab_at_groupstudy.com
> > > Subject: Re: QS: FIB and RIB: what is the difference
> > >
> > > The Routing Information Base is the copy of the routing table stored
> > > in software on the Cisco device.
> > >
> > > The Forwarding Information Base is the copy of the routing table
> > > stored in hardware on the Cisco device.
> > >
> > > Thanks to Cisco Express Forwarding (CEF) and its use of the FIB,
> > > performance for Cisco routers is much improved.
> > >
> > > Warmest Regards,
> > >
> > > Anthony J. Sequeira, CCIE #15626
> > > http://www.INE.com <http://www.ine.com/> <http://www.ine.com/>
> > >
> > > Test your Core Knowledge today!
> > > Q: What protocol supports load-balancing with first-hop redundancy?
> > > A: gateway load balancing protocol
> > > More Info:
> > >
> >
> >
> http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html
> > >
> > >
> > > On Sep 25, 2009, at 10:47 AM, Syed Khalid Ali wrote:
> > >
> > > > dear group,
> > > >
> > > > I just started to prepare for R&S track. While going through the "ip
> > > > packet
> > > > debug command" these two terms just popped up.
> > > > What is the difference between these two?
> > > >
> > > > Thanks
> > > > Khalid
> > > >
> > > >
> > > >
> > > > _________________________________________________________________
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> > >
> > >
> > >
> > >
> > >
> > >
> > > --
> > > Narbik Kocharians
> > > CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> > > www.MicronicsTraining.com <http://www.micronicstraining.com/> <
> http://www.micronicstraining.com/>
> > > Sr. Technical Instructor
> >
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> --
> Salah
> CCIE #24207
>
>
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--
Ernest McCaleb
Blogs and organic groups at http://www.ccie.net