vlan and trunk

[dav9Member]

#155273

hi all

i have some questions about configuring vlan.

i have an existing environment. no vlan is set.

can i configure vlan for a special purpose,
while the main network still work without vlan config for it?
then can i route between those two networks?

also
if i have i 2 switches with 2 vlan config on them
can i use only one cable to connect those 2 swithces?
or should i have a cable per vlan?
(i am not intend to use a backbone config)

my confusion is,
in each switch there should be a trunk setting
but those this setting, which is configure on the port
should be also connected? using a cable?

if so, then i am confused
since, if i need to use a different cables,
then it not so far from using a different segments

thanks

[kevinguerreiroParticipant]

#350510

Re: vlan and trunk

Hmm i dont understand much of vlan, but i think you probably should give more details of your network, topology, what equipment you have…etc…etc…

Regards
Kevin

[TexasTazMember]

#381942

Re: vlan and trunk

If your equipment as you said support vlan you can use them without any problems.

Quote:

can i configure vlan for a special purpose,
while the main network still work without vlan config for it?
then can i route between those two networks?

Yes you can, the only problem is each vlan as to be in a separate subnet. It means for example all the equipment in Vlan 10 as to be in the subnet 192.168.1.0/24 and the Vlan 20 in 192.168.2.0/24
To route between this 2 vlans you need a router and to configure it as a “router on a stick” or your switch need to be a layer 3 switch.

Quote:

also
if i have i 2 switches with 2 vlan config on them
can i use only one cable to connect those 2 switches?
or should i have a cable per vlan?
(i am not intend to use a backbone config)

Yes and that the reason you define a trunk port. The ports how join the 2 switches has to been configure as a trunk ports and the others one in access in the Vlan A or B as your needs.

Good Luck ;)

[runrigMember]

#382593

Re: vlan and trunk

since you are saying “trunk” and not “tagged vlans” i take it you have a cisco switch.

actually vlans operating on the layer 2 (datalink) side of the osi model. each vlan could have the same network range, but as xavierds said. if you want the vlans to talk to eachother then you will need a router and the vlans will need different ip network ranges.

since its a flat network with no vlan structure, by default, you are in vlan 1

let us know if you need an example of how one looks…

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