Re: Clock Rate

Well technically router is a DTE. But routers can switch frames...
frame-relay, hdlc are examples of this. A wic-1t card will use serial cable
that has defined DTE/DCE connection on it. The cable will determine what is
what and usually all clocking is done on frame switch so no clock on router.

I noticed on GNS 3 my serials were all clocked like cables are reversed but
everything works. I would make sure physical link isn't flapping than
monitor debug output to see if it is physical.
On Jul 17, 2011 6:37 AM, "Carlos G Mendioroz" <tron_at_huapi.ba.ar> wrote:
> This is getting so distant from reality ... as a lab can get.
> What exactly is DCE and DTE ? Is a router a DTE or a DCE ?
> Is the cable a DCE or a DTE ? :)
> -Carlos
>
> Radioactive Frog @ 17/07/2011 01:57 -0300 dixit:
>> Great explaination Gaurav.
>> Just would add on top of gaurav's statement - You need a very SPECIFIC
>> cables that has one end DTE and other end DCE to get it working.
>>
>> On Sun, Jul 17, 2011 at 2:12 AM, GAURAV MADAN <gauravmadan1177_at_gmail.com
>wrote:
>>
>>> Things to consider here are :
>>>
>>> 1) Clock rate is applicable to DCE devices and not on DTE devices
>>> 2) Devices can be categorized as DCE or DTE depending the cable
connected
>>> to
>>> serial interface.
>>> 3) Generally DCE devices are FR switch etc.
>>> 4) If you are configuring the back to back connection ; configure "clock
>>> rate <> " CLI on DCE end only
>>> 5) I think latest IOS on serial HWIC will take clock rate command only
on
>>> DCE end and not on DTE end . However older IOS used to take it on any
>>> device
>>> 6) Any rate is good ... as long as it is working .. default 9600 bps
should
>>> be OK .
>>>
>>>
>>> HTH
>>> Gaurav Madan
>>> CCIE
>>>
>>> On Sat, Jul 16, 2011 at 9:36 PM, <jhnrose401_at_gmail.com> wrote:
>>>
>>>> Dear
>>>>
>>>> I want to know what clock rate i will use when i am in the lab or when
i
>>> am
>>>> using
>>>> dynamips what is the method or way i will configure the correct clock
>>>> rate to
>>>> my routers
>>>>
>>>> Eg
>>>>
>>>> For DCE i ll configure the clock rate not for DTE correct
>>>>
>>>> if both devices are DCE i will define CR on both or in a single
devices.
>>>>
>>>> R1 --ser1/0 -------------------s1/0 R2
>>>>
>>>> I am facing problem my ospf adj flap after few minutes is CR are the
>>> reason
>>>> R1 = s1/0 ip add 10.1.1.1/24 and loop back 1.1.1.1/24
>>>> R2 = s1/0 ip add 10.1.1.2/24 and loop back 2.1.1.1/24
>>>> clock rate 64000 on both sides
>>>> R1 and R2
>>>>
>>>> router ospf 1
>>>> net 0.0.0.0 255.255.255.255 are 0
>>>>
>>>> thks
>>>>
>>>>
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>>
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>>
>
> --
> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>
>
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>
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Received on Sun Jul 17 2011 - 06:52:32 ART