Re: You had me at Frame intf-type

It has to do with the logical control mechanisms of the Frame-relay switch.
FR-DCE / FR-DTE denotes the Master/Slave relationship of the FR Switch and
the FR Router.

Don't confuse "Frame-Relay DCE" with Physical DCE. That is a common
misunderstanding.

You even see it called "FR DCE" if you use IOS help

R5(config-if)#frame-relay intf-type ?
  dce Configure a FR DCE
  dte Configure a FR DTE
  nni Configure a FR NNI

Physical (Layer 1) DCE provides clocking, Logical Frame-Relay DCE (Layer 2)
has nothing to do with physical clocking. It can be configured on a physical
DTE, or the physical DCE, it doesn't matter.

By default, a frame-relay interface is a FR-DTE, and in order to provide
Frame-Relay switching, the FR Switch needs to be the "master" (send out LMIs
and stuff), so you have to configure it to be the FR-DCE in order for
Frame-relay switching to work properly.

And by the way, "frame-relay intf-type nni" is used when connecting one
frame-relay switch to another frame-relay switch.

Atle

On Sun, Aug 28, 2011 at 10:33 PM, marc edwards <renorider_at_gmail.com> wrote:

> Morning/Evening Experts:
>
> Can somebody elaborate on frame-relay intf-type dce? Looks like a command
> that actually goes on the physical DTE. Something that can wreck a whole
> lab
> (practice or real) if not well understood.
>
> Thanks,
>
> Marc
>
>
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Received on Sun Aug 28 2011 - 23:58:20 ART