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kill97
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 vlans
hi guys,
got a question here;
i have 3 switchs wih vlan configured and are connected to 1 switch(no vlan and and is jus a dummy switch). if a host in 1vlan do a brodcast, will all host in all other vlan receive it.
cheers,
kelvin
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 02-07-04 07:58 AM
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worrywarm
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I don't think so
VLAN is used for break up broadcast domain; as to being connected to a dump switch, only means a pc in one vlan can not communicate with a pc in another vlan.
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02-07-04 04:44 PM
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dmaftei
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Re: vlans
quote:
Originally posted by kill97
if a host in 1vlan do a brodcast, will all host in all other vlan receive it.
Only the hosts in the same vlan will receive the broadcast, provided the vlan is indeed connected (which might not be, considering your dumb switch in the middle).
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02-07-04 08:42 PM
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kill97
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hi dmaftei,
thanks for your reply,
yes the vlan is not connected because of the dumb switch.
so in this case, will the broascast goes into all vlan that is connected to the dumb switch?
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02-09-04 01:25 PM
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dmaftei
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If I remember VLANs correctly, your broadcast won't make it to the dumb switch. If you have
SW1 -- SWDUMB -- SW2
SW1 and SW2 both have VLAN101 and VLAN102, and you broadcast from a host connected to SW1/VLAN101, only hosts connected to SW1/VLAN101 will get the broadcast. But I may be wrong, you may want to double check.
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Last edited by dmaftei on 02-16-04 at 01:29 PM
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02-16-04 04:37 AM
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Yankee
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02-16-04 12:48 PM
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kill97
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02-16-04 04:43 PM
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dmaftei
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quote:
Originally posted by kill97
how can i generate a broadcast from a pc?
ping 192.168.0.255
quote:
and of course how can i capture that broadcast?
tcpdump or ethereal
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02-16-04 04:57 PM
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