Re: Synchronous and asynchronous communication

Yep, that's a 2A/S interface, not a 2T. That's why I included a show
hardware up front! :)

-Carlos

GAURAV MADAN @ 31/01/2011 08:51 -0300 dixit:
> I see "physical-layer" command is present in your 2811.
> Thats the command you use to convert .
>
> Thnx !
> Gaurav Madan
>
> On Mon, Jan 31, 2011 at 5:07 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar> wrote:
>> Gaurav,
>> at least in the routers I have access to, T interfaces can not do async:
>>
>> R1#sh hard
>> ...
>> Cisco 2811 (revision 53.51) with 237568K/24576K bytes of memory.
>> Processor board ID FTX1132F033
>> 2 FastEthernet interfaces
>> 2 Low-speed serial(sync/async) interfaces
>> ...
>> R1#conf t
>> Enter configuration commands, one per line. End with CNTL/Z.
>> R1(config)#int s 0/0/0
>> R1(config-if)#p?
>> physical-layer priority-group pulse-time
>>
>> R1(config-if)#p
>>
>> ------------------------
>>
>> GW#sh hard
>> ...
>> isco 2610XM (MPC860P) processor (revision 1.0) with 127430K/3642K bytes of
>> memo
>> ry.
>> Processor board ID JAE07382264
>> M860 processor: part number 5, mask 2
>> 1 FastEthernet interface
>> 2 Serial interfaces
>> ...
>> GW#conf t
>> Enter configuration commands, one per line. End with CNTL/Z.
>> GW(config)#int s 0/0
>> GW(config-if)#p?
>> priority-group pulse-time
>>
>> GW(config-if)#p
>>
>> Can you please test it ?
>> -Carlos
>>
>>
>>
>>
>> GAURAV MADAN @ 30/01/2011 12:57 -0300 dixit:
>>> Under Serial-interface issue the command :
>>>
>>> int serial <>
>>> physical-layer async .
>>>
>>> 1) By default the interface will operate in SYNC mode
>>> 2) You can switch between sync and async mode
>>> 3) This is applicable to WIC / HWIC -2T , HWIC-1T , HWIC-2A/S etc . On
>>> ISRs and ISR-G2 .. Other platform line cards ... I am not sure
>>>
>>> Thanks
>>> Gaurav Madan
>>> CCIE
>>>
>>> On Sun, Jan 30, 2011 at 9:16 PM, Routing Freak <routingfreak_at_gmail.com>
>>> wrote:
>>>> how to change a interface to syn or asyn
>>>> is there any command to change a router serial interface as a asyn
>>>> whether ethernet interface has any significance wid sync and async
>>>> interface
>>>>
>>>> On Sun, Jan 30, 2011 at 9:07 PM, GAURAV MADAN <gauravmadan1177_at_gmail.com>
>>>> wrote:
>>>>> Communication is called asynchronous if the sender and receiver do not
>>>>> need to synchronise before each transmission. A sender can wait
>>>>> arbitrarily long between transmissions and the receiver must be ready
>>>>> to receive data when it arrives.
>>>>>
>>>>> Synch. transmission agree to clock rate before the data transmission
>>>>> occurs .
>>>>>
>>>>> Example would be : Serial interface which can work in sync as well as
>>>>> async mode .
>>>>> In sync mode ; you have to configure clock rate on DCE and then only
>>>>> data transmission occurs .
>>>>>
>>>>> Async serial interfaces ; there is no funda of clock rate CLI .
>>>>>
>>>>> I hope I made things clearer .
>>>>>
>>>>> Gaurav Madan
>>>>> CCIE
>>>>>
>>>>> On Sun, Jan 30, 2011 at 3:14 PM, Routing Freak <routingfreak_at_gmail.com>
>>>>> wrote:
>>>>>> Can anyone tell me what is the difference between the synchronous and
>>>>>> asynchronous communication in routers,switches and hosts
>>>>>>
>>>>>>
>>>>>> Blogs and organic groups at http://www.ccie.net
>>>>>>
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>> --
>> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net