08-22-2011 06:18 AM - edited 03-07-2019 01:49 AM
Hello everybody,
Ihave configured DHCP service on my 3750 cisco switch and assign
different scope (with different subnet) according to the VLAN
configured on the same device.
on the same device i have configured different scopes according to the vlans and assigned ports to it . and can see different ips subnets to different vlans assigned ports when i plugged into each of port in to the switch.
here ...i don't want to relay to any other DHCP service but i'd
prefer to use the one provided by the 3750.
example configuration in layer3 switch:
vlan 10
name market
int gig 1/0/1
switchport mode access
switchport access vlan 10
interface vlan 10
ip address 10.10.10.1 255.255.255.0
no shut
ip dhcp pool marketing
network 10.10.10.0 255.255.255.0
default-router 10.10.X.X
end
ip dhcp excluded-address 10.10.10.1-10.10.10.3
above is an example where i configured vlan to a port in the same mannner i have configured 10 different vlans to different subnets with dhcp pool. i have verified by plugging into each and every port(assigned with respective vlans) and can see the different ip address subnet from the pool of dhcp.
..and here i have queries
i have two layer 2 switches where i want to connect to 3750 switch .. the connected port will be configured as trunk port at each end and i can see all the vlans configured in the 3750 switch into the layer 2 switches .
the host connected to layer 2 switch will he be able to get the ips from the dhcp pool configured in the 3750 switch.
example :
layer 2 switch:
int fa 0/2
switchport mode access
switchport access vlan 10
1 now the user connected to port fa 0/2 (vlan 10) can he able to get the ip address from dhcp pool (10.10.10.0/24) configured in layer 3 (3750) switch ?
2. if yes is there any extra command to be added of a port or vlan in layer 2 switches ?
Thanks in advance.
sreek
08-22-2011 06:44 AM
hi all
can anyone please help me out for above query..
thanks
sreek
08-22-2011 06:49 AM
Hi Sreek,
You setup work work just fine. All you need on the later-2 switches is the layer-2 vlan and assign the physical ports to specific vlans.The 3750 switch is you layer-3 device that provide the IPs to all the vlans. Also on the layer 2 switches ports that connects to the end users devies, turn on port fast
int fa 0/2
switchport mode access
switchport access vlan 10
spannin port-fast
HTH
Reza
08-22-2011 06:49 AM
Sreek
1) Yes
2) No
Jon
08-22-2011 06:50 AM
thanks to jon and riza
08-22-2011 07:05 AM
hi
can i give ip address based on MAC address of connected host. with dhcp service enabled as like above in switch per vlan.....i mean like a static address assignee based on mac of host.
if yes how it can be done.
08-22-2011 07:13 AM
Yes you can do this. Under the DHCP pool config -
ip dhcp pool
host
client-identifier 0100.0cf1.0560.98 <-- mac-address of host
Jon
08-22-2011 07:23 AM
thanks a lot jon and reza .. thnks fr ur time
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