On 27/01/2011 11:30, jack daniels wrote:
I have a vey basic doubt about two scenarios -
1) SCENARIO 1
VLAN X , VLAN Y , VLAN Z -----HUB---switch
will vlan headers be kept intact and communication between
a) VLAN X (SUBNET 1) and its gateway on switch will happen
b) VLAN Y (SUBNET 2) and its gateway on switch will happen
c) VLAN Z (SUBNET 3) and its gateway on switch will happen
It might work. Or it might not - depends on how broken the equipment is,
and when you're talking about low-end kit, the breakage levels can be
astonishing.
2) SUBNET1 , SUBNET 2 , SUBNET 3 -----HUB---switch
in this case there are no vlan and I create three IP address on L3
interface of switch one primary and other two scendory IP address.
That will "work", so long as you don't have any MAC address overlaps. It's
rotten bad networking practice, and will break horribly if you use
subinterfaces / vlan interfaces with the same mac address. It would be
best not to design your network like this. It will cause you long term
problems.
Best just get rid of the hub. BTW, a hub will be half-duplex, so your
throughput will also be trash.
(Can you still even buy hubs?)
Nick
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