From: Jay Hennigan (jay@west.net)
Date: Sun Oct 27 2002 - 16:13:36 GMT-3
On Sun, 27 Oct 2002, Peng Zheng wrote:
> When I set up the clock rate for AGS router ( I want
> it to be a frame-relay switch), after I set up:
>
> no ip address
> encapsulation frame-relay
> frame-relay lmi-type ansi
> frame-relay intf-type dce
>
> I type :
> clock rate 64000, then I got:
> Setting clock rate for DTE's is not allowed
>
> Does anyone know what't the problem?
The physical interface is different from the frame-relay logical interface
type.
Clock rate applies to layer 1 DCE, determined by the cable type. If this
is a lab setup where you have a crossover serial cable, set clock rate on
the other side of the link or swap ends of the cable. If you're using
CSU/DSUs between them, set the clock on one of the CSUs to internal. If
a real network, check with the carrier to see if they supply clock on the
loop and if so set both CSUs to network or loop clocking, otherwise set
one of them to internal.
It's perfectly fine to have the frame-relay switch be logical DCE and
physical DTE or vice-versa.
Physical DCE/DTE pertains to the cable type and line clocking.
Frame-relay interface DCE/DTE pertains to how LMI is handled.
Two different things.
-- Jay Hennigan - CCIE #7880 - Network Administration - jay@west.net NetLojix Communications, Inc. - http://www.netlojix.com/ WestNet: Connecting you to the planet. 805 884-6323
This archive was generated by hypermail 2.1.4 : Tue Nov 05 2002 - 08:35:57 GMT-3