Re: [manet] ARP in MANETS

Hi,

>Another question would be, 
>do MANETs implement ARP to resolve unknown MAC addresses just like in wired 
>LANs, or is there any other process to map ip address to MAC address in 
>MANETS.
>
As far as I know, ARP is used to map IP addresses to MAC addresses. In 
for example ns-2 (which of course is not "real world") ARP is used for 
that purpose.

Kind regards
Ali


fxbaloch wrote:

>Rex,
>
>First of all thanks for prompt reply. Second of all let me ask you this to 
>clearify further. How would a MAC layer look into the MAC header if it is the 
>one to put the MAC header onto the packet coming from upper layer (Network 
>layer)? I am talking about the packet that a node sends out to other node. I 
>am not talking about MAC layer's function after it "receives" the packet from 
>other node. Please let me know how a MAC header is created by a node. It has 
>to some how look at the IP header of the frame coming from above layer in 
>order to append the MAC layer header (e.g. Destination MAC address) to the 
>packet.
>
>Therefore I asked about the ARP process in MANETS as well because if a node 
>doesnt know about the MAC address of the destination node how would it 
>proceed.
>
>
>Thanks alot
>Fariha
>
>  
>
>>===== Original Message From Rex Buddenberg <budden@nps.navy.mil> =====
>>On Mon, 2006-04-24 at 12:33 -0500, fxbaloch wrote:
>>    
>>
>>>Ali,
>>>
>>>Can you help me with these queries. After a packet comes from Network layer
>>>into the MAC layer, does the MAC layer reads all of its contents till the 
>>>      
>>>
>end
>  
>
>>>of packet or just the destination address in order to proceed with RTS/CTS
>>>process and then eventually sending out the packet?
>>>      
>>>
>>The MAC layer should only look at data in the (MAC) frame header.
>>Looking farther should get you a visit by the Protocol Police for layer
>>violation.
>>
>>Remember that MANET is not specific to 802.11 (a misunderstanding that
>>you're hinting that you have by the reference to RTS/CTS).  The MANET
>>protocols are supposed to work in _any_ network with high route
>>volatility.  Looking at packet contents beyond the frame header would
>>destroy this generality.  (This is an easy misunderstanding to get into
>>since WiFi is so common in commercial world.  Most all academic
>>experiments dealing with MANET use WiFi underneath because it's cheap
>>and available).
>>    
>>
>
>Fariha Baloch
>GRA Electrical and Computer Dept.,
>Wichita State University.
>
>
>  
>