On Sun, 29 Oct 2000, whatshakin wrote:
> High speed (synchronous) ports are good for 2.048mb/s and the low speed
> (asynchronous) ports max out at 115.2 Kb/s.
we aren't talking about async ports though. The 252x is 4 syncrhonous
ports. 2 low speed synchronous, and 2 high speed. I believe high speed
sync ports can goto 4Mbps, and low speed to 64kps............I may be
wrong though.
Brian
>
>
>
> ----- Original Message -----
> From: Brian <[EMAIL PROTECTED]>
> Newsgroups: groupstudy.cisco
> To: Austin <[EMAIL PROTECTED]>
> Cc: <[EMAIL PROTECTED]>
> Sent: Saturday, October 28, 2000 7:47 PM
> Subject: Re: Frame Switch
>
>
> > 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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>
> _________________________________
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>
-----------------------------------------------
Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
Network Administrator
ShreveNet Inc. (ASN 11881)
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