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

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.
> > >>>
> > >>>
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> > >>>
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Received on Sat Aug 08 2009 - 11:05:57 ART