two subnets thru same wire

[mlists at tdbnetworks.org]

Shiraz I've answered each question inline below:


> My question realtes the fact, whether we can have two
> subnets passing thru same wire and communicating with
> each other. The two subnets are: 
>                   -----------------
>                   |     Hub       |
>                   -----------------
>                    |    |   |   |
>   -----------------     |   |   ---------------
>   |              -------    -------            |
>   |              |                |            |
>   192.168.10.3   |                |       192.168.11.5
>       A      192.168.11.3      192.168.10.5    D
>                   B                 C             
> 
>    It is a six port Hub. Four hosts with IP addresses
> given above are attached to the hub. There are two
> subnets 192.168.10.0 and 192.168.11.0. 
> The netmask is 255.255.255.0 in all cases.
> 
> Q1: Will Host A be able to talk to Host C?
	Yes, They have the same subnet mask and network address

> Q2: Will Host B be able to talk to Host D?
	Yes, They have the same subnet mask and network address	

> Q3: If the communication is possible, are there likely
> to be any problems?
	Their can be problems cause by this kind of setup but it all depends on
whether this is a test setup at home or a real scenario at work in a
large network.


	From a strategic point of view I would always advise against more than
a class c in one broadcast domain, this means that you should either put
them on different switches bounded by a router or use a single switch
with multiple vlans and again bound them with a router.	

> Q4. If instead of switch, we use hub, will it make any difference?
	Switches are higher performance devices which can be managed and
controlled so I would have to ask again whether you are doing this at
home or in a large scenario at work.
	

On Fri, 2005-03-25 at 09:26 +0100, David Balazic wrote:
> If you set the netmask to 255.255.0.0 on all hosts, then this will work
> without any problems.
> 
> A switch will give better performance under high loads, otherwise it is more
> or less the same a normal hub.
> 
> Regards,
> David
> 
> -----Original Message-----
> From: redhat-list-bounces at redhat.com [mailto:redhat-list-bounces at redhat.com]
> On Behalf Of Shiraz Baig
> Sent: 25. marec 2005 5:34
> To: redhat
> Subject: two subnets thru same wire
> 
> 
> My question realtes the fact, whether we can have two
> subnets passing thru same wire and communicating with
> each other. The two subnets are: 
>                   -----------------
>                   |     Hub       |
>                   -----------------
>                    |    |   |   |
>   -----------------     |   |   ---------------
>   |              -------    -------            |
>   |              |                |            |
>   192.168.10.3   |                |       192.168.11.5
>       A      192.168.11.3      192.168.10.5    D
>                   B                 C             
> 
>    It is a six port Hub. Four hosts with IP addresses
> given above are attached to the hub. There are two
> subnets 192.168.10.0 and 192.168.11.0. 
> The netmask is 255.255.255.0 in all cases.
> 
> Q1: Will Host A be able to talk to Host C?
> Q2: Will Host B be able to talk to Host D?
> Q3: If the communication is possible, are there likely
> to be any problems?
> Q4. If instead of switch, we use hub, will it make any difference?
> 
> 
> 
> 		
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