Layer 3 switching combines the best of switching and routing in one
platform. The main advantage here is speed. The way it works is, in a
switch you have some kind of layer 3 routing engine (aka route processor, or
RP). For example, the MSFC2 (Multilayer Switch Feature Card 2) is one of
the opti
At 03:54 PM 2/25/2003 +, DeVoe, Charles (PKI) wrote:
>I am under the impression that switching is a layer 2 function and that
>routing is a layer 3 function. I have seen several discussions talking
>about layer 3 switching. Could someone explain this to me?
Bridging is a layer two function,
According to Cisco:
Layer 3 switching refers to a class of high-performance switch routers
optimized for the campus LAN or intranet, providing wirespeed Ethernet
routing and switching services.
Compared to other routers, Layer 3 switch routers process more packets
faster by using application-spec
There are two scenario's discussed here, and I am sure I'll
be corrected by everyone...
Multi layer switching version means that the first packet in
a flow of data will be routed the usual way
in the ios software, then the rest of the packets in the
flow will be hardware switched from L2 port thru
Switching is the function of directing frames or packets from one port or
interface to another. A layer 3 switch, switches packets at wire speed
using ASICs. An example would be the 8500 series.
>From: "DeVoe, Charles (PKI)"
>Reply-To: "DeVoe, Charles (PKI)"
>To: [EMAIL PROTECTED]
>Subject:
More or less in one word, marketing!!
Dave
DeVoe, Charles (PKI) wrote:
> I am under the impression that switching is a layer 2 function and that
> routing is a layer 3 function. I have seen several discussions talking
> about layer 3 switching. Could someone explain this to me?
--
David Madl
At 3:54 PM + 2/25/03, DeVoe, Charles (PKI) wrote:
>I am under the impression that switching is a layer 2 function and that
>routing is a layer 3 function. I have seen several discussions talking
>about layer 3 switching. Could someone explain this to me?
The bottom line is that layer 3 switc
Robert Edmonds wrote:
>
> Layer 3 switching combines the best of switching and routing in
> one
> platform. The main advantage here is speed. The way it works
> is, in a
> switch you have some kind of layer 3 routing engine (aka route
> processor, or
> RP). For example, the MSFC2 (Multilayer Sw
At 4:46 PM + 2/25/03, Robert Edmonds wrote:
>Layer 3 switching combines the best of switching and routing in one
>platform.
It isn't the best of both worlds, because raw forwarding speed is
frequently not the constraint on real-world network design. From a
cost standpoint, it would be comple
Charles,
Regarding the meaning of the term "switch", let me quote a few lines from
my favorite Net Goddess, Radia Perlman. She wrote the DEC STP protocol and
has been very active in protocol development since day one. In her book,
Interconnections, she says the following:
"One cynical (and ung
ions based on the MAC address???
-Original Message-
From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]
Sent: Tuesday, February 25, 2003 1:33 PM
To: [EMAIL PROTECTED]
Subject: Re: L3 Switching Huh???? [7:63728]
Robert Edmonds wrote:
>
> Layer 3 switching combines the best
May I suggest people consult RFC 1812 and
http://www.ietf.org/html.charters/forces-charter.html
before going off into marketing definitions of switching?
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=63781&t=63728
--
FAQ, list
At 04:46 PM 2/25/2003 +, Robert Edmonds wrote:
>Layer 3 switching combines the best of switching and routing in one
>platform. The main advantage here is speed. The way it works is, in a
>switch you have some kind of layer 3 routing engine (aka route processor, or
>RP). For example, the MSFC
At 06:03 PM 2/25/2003 +, Ellis, Andrew wrote:
>According to Cisco:
>
>Layer 3 switching refers to a class of high-performance switch routers
>optimized for the campus LAN or intranet, providing wirespeed Ethernet
>routing and switching services.
>
>Compared to other routers, Layer 3 switch rout
At 7:34 PM + 2/25/03, Bob Sinclair wrote:
>Charles,
>
>Regarding the meaning of the term "switch", let me quote a few lines from
>my favorite Net Goddess, Radia Perlman. She wrote the DEC STP protocol and
>has been very active in protocol development since day one. In her book,
>Interconnect
---Original Message-----
> From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, February 25, 2003 1:33 PM
> To: [EMAIL PROTECTED]
> Subject: Re: L3 Switching Huh [7:63728]
>
>
> Robert Edmonds wrote:
> >
> > Layer 3 switching combines the
Howard C. Berkowitz wrote:
> >Strongly recommend her book. The lady has a lot of style.
> >
>
> I don't remember if she's still doing a protocol design seminar
> as
> she used to do at Interop, but she's a delightful speaker, once
> you
> get used to the idea of somebody being a stereotyped New
Berkowitz [mailto:[EMAIL PROTECTED]
Sent: 25 February 2003 22:27
To: [EMAIL PROTECTED]
Subject: Re: L3 Switching Huh???? [7:63728]
At 7:34 PM + 2/25/03, Bob Sinclair wrote:
>Charles,
>
>Regarding the meaning of the term "switch", let me quote a few lines
>from my favorite
> -Original Message-
> From: Howard C. Berkowitz [mailto:[EMAIL PROTECTED]
> Sent: 25 February 2003 22:27
> To: [EMAIL PROTECTED]
> Subject: Re: L3 Switching Huh [7:63728]
>
>
> At 7:34 PM + 2/25/03, Bob Sinclair wrote:
> >Charles,
> >
> >Rega
>How do you nag a packet? Infact, is it not an oxymoron?
How would you feel if you were a packet confronted with a debug log
and a demand to explain
>
>To nag is to continually pester or annoy, yet a packets lifetime is
>normally measured in milliseconds, therefore she must be one hell of a
>nag
OK, let me try this again. I am trying to figure out the difference between
conventional layer 3 routing and layer 3 switching. A little background. I
am currently working towards my CCNA (have been for about 3 years). At any
rate, everything I read and look at says that switching/bridging is a
If you are using MSFC2/PFC2, the PFC2 (does layer 3 wirespeed 'forwarding'
between Vlan) will have a FIB (forwarding information base), which is a copy
of the RIB (routing information base). The RIB is built on the MSFC2 (router
functions).
Even the first packet between Vlan 1 and 2 will be wire s
es (PKI) [mailto:[EMAIL PROTECTED]
Sent: Wednesday, February 26, 2003 7:45 AM
To: [EMAIL PROTECTED]
Subject: RE: L3 Switching Huh [7:63728]
OK, let me try this again. I am trying to figure out the difference between
conventional layer 3 routing and layer 3 switching. A little background.
by software.
This is not the definitive answer but hopefully it clears away some of the
mud.
Cheers,
Steve Wilson
Network Engineer
-Original Message-
From: DeVoe, Charles (PKI) [mailto:[EMAIL PROTECTED]
Sent: 26 February 2003 12:45
To: [EMAIL PROTECTED]
Subject: RE: L3 Switching Huh [7:
At 12:45 PM + 2/26/03, DeVoe, Charles (PKI) wrote:
>OK, let me try this again. I am trying to figure out the difference between
>conventional layer 3 routing and layer 3 switching. A little background. I
>am currently working towards my CCNA (have been for about 3 years). At any
>rate, ever
At 3:18 PM + 2/26/03, Steve Wilson wrote:
>Charles,
>The 6509 switch needs some configuration in the background to create a
>"virtual router".
A bit of a heads-up on this term. It's conceptually useful, but be
aware that "virtual router" was considered to be an alternate VPN
model to RFC 25
DeVoe, Charles (PKI) wrote:
>
> OK, let me try this again. I am trying to figure out the
> difference between
> conventional layer 3 routing and layer 3 switching. A little
> background. I
> am currently working towards my CCNA (have been for about 3
> years). At any
> rate, everything I read
"layer 3 switching" is a
> marketing term,
> not scientific or engineering in nature. ... you said "layer 3
> routing" ...
> Thanks!
> TJ
> [EMAIL PROTECTED]
>
>
> -----Original Message-----
> From: DeVoe, Charles (PKI) [mailto:[EMAIL PROTECTED]
> Sent
"layer 3 switching" is a
> > marketing term,
> > not scientific or engineering in nature. ... you said "layer 3
> > routing" ...
> > Thanks!
> > TJ
> > [EMAIL PROTECTED]
> >
> >
> > -Original Message-
> > Fro
k Engineer
-Original Message-
From: Howard C. Berkowitz [mailto:[EMAIL PROTECTED]
Sent: 26 February 2003 18:27
To: [EMAIL PROTECTED]
Subject: RE: L3 Switching Huh???? [7:63728]
At 3:18 PM + 2/26/03, Steve Wilson wrote:
>Charles,
>The 6509 switch needs some configuration in t
considered an enclosure
for a small Storage Area Network interconnecting the blades. I
rather prefer the latter.
Howard
>
>-Original Message-
>From: Howard C. Berkowitz [mailto:[EMAIL PROTECTED]
>Sent: 26 February 2003 18:27
>To: [EMAIL PROTECTED]
>Subject: RE: L3 Sw
>Howard C. Berkowitz wrote:
>
>> >Strongly recommend her book. The lady has a lot of style.
>> >
>>
>> I don't remember if she's still doing a protocol design seminar
>> as
>> she used to do at Interop, but she's a delightful speaker, once
>> you
>> get used to the idea of somebody being a stereo
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