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| can anyone explain briefly how do layer 3 switches function? do they filter
packets based on IP addresses??
thanks
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| thanks a lot!!!!!
"edmonds_robert" <edmonds_robert.158ewl@mail.examnotes.net> wrote in message
news:edmonds_robert.158ewl@mail.examnotes.net...
>
> A layer 3 switch's ports can just like a regular switch's ports, or it
> can act like a router port. The advantage is that they can (in
> general) switch packets faster than a regular router, so it's kind of
> the best of both worlds. Please review the following links for some
> great detailed information.
>
> http://tinyurl.com/24b9b
>
> http://tinyurl.com/3xh5c
>
> http://www.bcr.com/bcrmag/mlsreference.asp
>
>
> edmonds_robert
> Sign up for free daily practice questions at: http://www.QoD.US
> ------------------------------------------------------------------------
> Posted via http://www.examnotes.net
> ------------------------------------------------------------------------
> View this thread: http://www.examnotes.net/article1040415.html
>
>
>
| |
| Hansang Bae 2004-04-24, 3:25 pm |
| In article <Xqdic.89733$Gp4.2082015@news20.bellglobal.com>,
raven@wrath.com says...
> can anyone explain briefly how do layer 3 switches function? do they filter
> packets based on IP addresses??
Marketing speak.
bridge == switch
L3 switch == router.
L3 Switch is a router. No more, no less.
--
hsb
"Somehow I imagined this experience would be more rewarding" Calvin
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| |
|
| Layer 3 switching is a way of giving the benefits of a layer 2 switch i.e.
speed based on layer 3 routing.
It is achieved in the switch but needs a router to set up each path
originally, either by a remote router or a router module plugged into the
switch. The switch would pass the first packet to the router as normal and
if the router passed the packet back to the same switch (i.e. VLAN routing)
the switch would then modify future frames/packets (i.e. layer2 and 3) and
switch them to the relevent port modifying them so they looked like they
passed through the router.
Regards
Toby
"jorg" <raven@wrath.com> wrote in message
news:Xqdic.89733$Gp4.2082015@news20.bellglobal.com...
> can anyone explain briefly how do layer 3 switches function? do they
filter
> packets based on IP addresses??
> thanks
>
>
| |
| Bernie 2004-04-26, 12:27 am |
| On Sun, 25 Apr 2004 00:40:57 +0100, "Toby" <notavailable@ntlworls.com>
wrote:
>Layer 3 switching is a way of giving the benefits of a layer 2 switch i.e.
>speed based on layer 3 routing.
>
>It is achieved in the switch but needs a router to set up each path
>originally, either by a remote router or a router module plugged into the
>switch. The switch would pass the first packet to the router as normal and
>if the router passed the packet back to the same switch (i.e. VLAN routing)
>the switch would then modify future frames/packets (i.e. layer2 and 3) and
>switch them to the relevent port modifying them so they looked like they
>passed through the router.
Careful. Just because Cisco does it that way doesn't mean you can
draw broad generalizations. First it wasn't Cisco that first coined
the phrase. It was the competitors that were switching every packet
in hardware (even the *first* packet) that coined this marketing term.
Cisco followed along by applying ancient technology, to accelerate
routing. For years there have been lots and lots of boxes that switch
every packet in hardware. And when companies like Broadcom are now
producing commodity L3 ASICs, you know even this is old technology...
--Bernie
| |
|
| True
But as this news group is based on Cisco certification, we can asume that
the question is based on answering Cisco CCNP level questions.
Toby
"Bernie" <Bernie@weekend.com> wrote in message
news:te0p8091nrupi58egd5o76d02
raj9k572k@4ax.com...
> On Sun, 25 Apr 2004 00:40:57 +0100, "Toby" <notavailable@ntlworls.com>
> wrote:
>
i.e.[color=blue]
and[color=blue]
routing)[color=blue]
and[color=blue]
>
> Careful. Just because Cisco does it that way doesn't mean you can
> draw broad generalizations. First it wasn't Cisco that first coined
> the phrase. It was the competitors that were switching every packet
> in hardware (even the *first* packet) that coined this marketing term.
> Cisco followed along by applying ancient technology, to accelerate
> routing. For years there have been lots and lots of boxes that switch
> every packet in hardware. And when companies like Broadcom are now
> producing commodity L3 ASICs, you know even this is old technology...
>
> --Bernie
| |
|
| Just thought I'd re post and thank Bernie on his comments as it is important
to know the realities of life as well as being bogged down in Cisco speak.
Toby
"Toby" <notavailable@ntlworls.com> wrote in message
news:nHfjc.24277$4N3.16144@newsfe1-win...
> True
>
> But as this news group is based on Cisco certification, we can asume that
> the question is based on answering Cisco CCNP level questions.
>
> Toby
>
> "Bernie" <Bernie@weekend.com> wrote in message
> news:te0p8091nrupi58egd5o76d02
raj9k572k@4ax.com...
> i.e.
the[color=blue]
> and
> routing)
> and
they[color=blue]
>
>
| |
| Bernie 2004-04-26, 10:35 pm |
| On Mon, 26 Apr 2004 23:28:57 +0100, "Toby" <notavailable@ntlworls.com>
wrote:
>Just thought I'd re post and thank Bernie on his comments as it is important
>to know the realities of life as well as being bogged down in Cisco speak.
Thanks. I was just trying to clarify this in light of the generic
context of "what is an L3 switch" etc. As opposed to "how do Cisco L3
switches work"... It looks like you caught the distinction I was
trying to make ;-)
>"Toby" <notavailable@ntlworls.com> wrote in message
>news:nHfjc.24277$4N3.16144@newsfe1-win...
>the
>they
>
--Bernie
|
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