Re: Cisco 3550 RSPAN - reflector-port What does it do?

Thank you all for taking time to answer this question. I have understood of
the use of a port-reflector now.

On Sun, Aug 9, 2009 at 1:46 AM, Narbik Kocharians <narbikk_at_gmail.com> wrote:

> RIPv2, that's if you are thinking 007.
>
>
> On Sat, Aug 8, 2009 at 8:05 AM, S Malik <ccie.09_at_gmail.com> wrote:
>
>> What kind of traffic can pass through a reflector port?
>>
>> On Sat, Aug 8, 2009 at 10:19 AM, Ramanpreet Singh
>> <sikandar.raman_at_gmail.com>wrote:
>>
>> > As Dan said that In Catalyst 3550's, the ASICs belong to ports so you
>> need
>> > to borrow one. Now because it has been borrowed, it will leave
>> underlying
>> > port unable to be used.
>> >
>> > Whereas in 3560's, the ASICs belong to the chassis and are allocated on
>> as
>> > need basis, hence not needed to do any specific allocation.
>> >
>> > Following link is pretty helpful in understanding the operation in
>> details.
>> >
>> >
>> >
>> http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015c612.shtml
>> >
>> >
>> > Thanks,
>> > Raman
>> >
>> > On Sat, Aug 8, 2009 at 8:20 AM, <Keegan.Holley_at_sungard.com> wrote:
>> >
>> > > I actually had the same question, but its still unclear to me. Excuse
>> me
>> > > if everyone else figured this out. So the reflector port is just a
>> port
>> > > that surrenders it's ASIC to be used for RSPAN? If so does there need
>> to
>> > > be one for the source and the dest or just the entire rspan operation?
>> > > Also, is it done only on the transit switches who carry only the RSPAN
>> > > VLAN? In other words if the switch has either a source port or a
>> > > destination port for the RSPAN does it automatically donate the ASIC
>> from
>> > > that port? Lastly, is this necessary for RSPAN to work or is this
>> just
>> > to
>> > > avoid a performance hit? The reason why I ask is because it's not in
>> the
>> > > 12.4 configuration guide fro the 3560.
>> > >
>> > > Thanks all,
>> > >
>> > > Keegan
>> > >
>> > >
>> > >
>> > >
>> > >
>> > >
>> > > Re: Cisco 3550 RSPAN - reflector-port What does it do?
>> > >
>> > > Danshtr
>> > > to:
>> > > Adrian
>> > > 08/08/09 07:26 AM
>> > >
>> > >
>> > > Sent by:
>> > > nobody_at_groupstudy.com
>> > > Cc:
>> > > Cisco certification
>> > > Please respond to Danshtr
>> > >
>> > >
>> > >
>> > >
>> > >
>> > >
>> > > true
>> > >
>> > > Best regards,
>> > > Dan
>> > >
>> > >
>> > >
>> > > On Sat, Aug 8, 2009 at 12:24 PM, Adrian <ccie2323_at_gmail.com> wrote:
>> > >
>> > > > so the port-reflector has to be any port that is not being used?
>> > > >
>> > > > On Sat, Aug 8, 2009 at 1:15 PM, Danshtr <danshtr_at_gmail.com> wrote:
>> > > >
>> > > >> As RSPAN is done in HW, the switch needs a port ASIC (something
>> like a
>> > > >> CPU).
>> > > >>
>> > > >> On 3560/2960/3750/4500/6500... the switch got a ASIC to do that,
>> on
>> > > 3550
>> > > >> it doensn't. On 3550 the switch is using one of the real port's
>> ASIC
>> > to
>> > > do
>> > > >> the RSPAN job. That port will be unoperational as its ASIC is
>> busy...
>> > > >>
>> > > >>
>> > > >> Best regards,
>> > > >> Dan
>> > > >>
>> > > >>
>> > > >>
>> > > >> On Sat, Aug 8, 2009 at 7:17 AM, Adrian <ccie2323_at_gmail.com>
>> wrote:
>> > > >>
>> > > >>> Hi Experts,
>> > > >>> What does reflector-port do in the RSPAN
>> configuration
>> > > for
>> > > >>> 3550? This command is not available for the newer switches that
>> i'm
>> > > >>> familar
>> > > >>> with, could anyone tell me what is that for? thank you.
>> > > >>>
>> > > >>>
>> > > >>> Blogs and organic groups at http://www.ccie.net
>> > > >>>
>> > > >>>
>> > >
>> _______________________________________________________________________
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>> > >
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>>
>
>
> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> www.MicronicsTraining.com <http://www.micronicstraining.com/>
> Sr. Technical Instructor

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Received on Sun Aug 09 2009 - 10:34:49 ART