On Sat, 28 Oct 2000, Austin wrote:
> I have a 2523 in my lab configured as a Frame Relay Switch.
> All the serial ports are acting as DCE providing clocking to the routers.
> Initially, all clock rates were set to 64000 but I changed it to 1000000 ...
> for some reason, only serial0 and serial1 accepted the new clockrate speed f
> 1000000 ... when i tried to enter the clock rate command on the others it
> says ... %Error: Unsupported clock rate for this interface .....
> When I do a show interfaces ....
> the output for serial0 and serial 1 ... the second line of the output says
> Hardware is HD64570 .............
> for all the other serial interfaces ..... the second line of the output says
> Hardware
> is CD2430 in sync mode .....
> The keywords being "in sync mode" ... I am guessing that this might be a
> reason I cannot set the clock rate on the other serial interfaces at 1000000
> ....
>
> Any ideas from anyone as to what is happening and why it is like that?
on 252x routers, you have 2 "high speed" serial interfaces, and 2 "low
speed" serial interfaces. High speed usually means that it can goto 4Mbps
I believe. Cisco usually denotes a modular high speed interface with "T",
as in like a NP-2T, or a NM-4T. Low speed usually means that it can goto
64kps. Low speed interfaces are denoted with an "S", like CSC-4S on a
AGS+ is 4 low speed ports.
Don't fret though, in a home lab this is fine usually. Even 4 low speed
interfaces would allow you to do everything.
Brian
>
> Thanks,
>
>
>
> _________________________________
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-----------------------------------------------
Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
Network Administrator
ShreveNet Inc. (ASN 11881)
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