Michael K. Smith wrote:
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> Just a side note. CEF and dCEF are supported in the 12.0.x S train (I think
> above 5) using ISL trunking.
This is definitely not the case with dot1q though. Weve been running
the 12.0.x S train for quite some time and were told all dot1q packets
were punted and there werent plans for integrating this into any
future revs. Maybe a ciscoteer can confirm that.
dave
>
> Mike
>
>
>
> - -----Original Message-----
> From: Dave Cooper [mailto:dcooper@gblx.net]
> Sent: Monday, August 14, 2000 2:24 PM
> To: cisco-nsp@puck.nether.net
> Cc: Rodney van den Oever; Hyunseog Ryu; cisco-nsp@puck.nether.net
> Subject: Re: [nsp] Cisco 7507 performance
>
>
>
> > This is not true. GEIP's behave like they are a single PA on a VIP
> > (which they are not, but they support dCEF in this manner). You will
> > find all your favourite VIP like commands work on them, it downloads
>
> This is the case with dot1q packets and i *believe* ISL -- these
> types cannot be CEF switched and are punted. Like you said, GigE
> and 75xx just dont mix well... and if you're even thinking about
> pushing anything over 200-300mb, save yourself pain and hassle and
> go buy a GSR or Juniper. If you require Gig-E speeds, you should be
> on those routers anyways.
>
> - -dave
>
> > an independent running version of IOS to the GEP etc. dCEF is not
> > switching between two PA's on the same card (necessarilly), it
> > is the holding of adjacency tables on the VIPs (or other card)
> > such that packets can be switched across the backplane without even
> > interrupt-level participation by the RSP. This is as functional with
> > the GEIP as it is with (say) VIP-2-50 + your favourite PA's.
> >
> > --
> > Alex Bligh
> > VP Core Network, Concentric Network Corporation
> > (formerly GX Networks, Xara Networks)
> >
>
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