Cisco Trunking vlan tagging
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Plug your SOHO router that is serving dhcp into fa4/0/10, fa4/0/11, fa4/0/12, fa4/0/20
If your router will not allow you to create scopes for vlan 10 and vlan 20. Then it will only serve one vlan.
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I did What you said and instead I have an image from a sophos router. It worked, But Now I would like to know, How to add the remain vlans to work, like vlan20. Should I create a relay agent for dhcp? Thanks
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Does your DHCP router support multiple scopes? if not, you will need to put a DHCP in each VLAN.
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No it doesn't but I could place a dchp server. In the real world they don't place relay agents? How will that be configure. If My dhcp is in vlan 10 I know I could create a relay agent to comunicate with it. Thanks for all your help Mr Ronnie
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You will find dhcp-relays in the real world to allow you to send the DHCP Broadcast beyond the Broadcast Domain.
I'm sure that within our Cisco courses you'll see how to configure a DHCP relay agent.I've never tried to do this the way you're describing.
You'll need a need either a router between the vlans or setup SVIs, then configure the dhcp relay agent correctly.