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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.
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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