Re: Synchronous and asynchronous communication

Correct .

The newer HWIC-1T / HWIC-2T etc for sure support this sync as well as async
And I can tell that this is on all ISRG1 and ISR-G2 .

However I am not sure on WIC-1T ( anyways this is very very old and
not a *Smart Serial* )

Thnx
Gaurav Madan

On Mon, Jan 31, 2011 at 5:55 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar> wrote:
> Gaurav,
> it is seen on a 2A/S, no issues there.
> I don't have many T modules, they are more expensive than A/S
> so you don't use it for labs.
>
> The one I tested is a 1T on a 2610XM.
>
> It might be that newer T modules are flexible.
> If you do a "show line" you might get a message indicating:
>
> Line(s) not in async mode -or- with no hardware support:
> 2-231
>
> "with no hardware support" clearly states that some lines do not
> support async, IMHO.
>
> Looking at the hardware spec sheets, I see that the HWIC-4T does
> async. So there might be our missunderstanding.
>
> -Carlos
>
>
>
>
> GAURAV MADAN @ 31/01/2011 08:59 -0300 dixit:
>>
>> Strange ..
>>
>> Can you give me following :
>>
>> 1) sh inventory : so that i know which WIC/HWIC are you using in 2811
>> ? ( tell me exact hardware where it is seen and where it is not seen )
>> 2) IOS in c2800 of 2811 ?
>>
>> Thnx
>> Gaurav Madan
>>
>> On Mon, Jan 31, 2011 at 5:23 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar>
>> wrote:
>>>
>>> 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
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> _______________________________________________________________________
>>>>>>>>> Subscription information may be found at:
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>>>>>>
>>>>>> _______________________________________________________________________
>>>>>> Subscription information may be found at:
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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
>>>
>
> --
> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina

Blogs and organic groups at http://www.ccie.net
Received on Mon Jan 31 2011 - 18:01:15 ART