DHCP and DHCP relay agent help, packet tracer cisco. help me

itsme12p

i need to set up the switch as dhcp server that needs to address ips for the 3 different lans , i was able to set up dhcp working for the 10.9.0.0/24 network however i cant get it working for either R1 or R2 networks , ive tried 'ip helper-address" commands many times but never worked out. things to note , everything can ping everything (if pcs using static address) one thing i noticed is that i cant ping the switch from anything besides the connected devices , and i think its may be the problem. i have also tried making the switch router connection on its own vlan and trunking it, but it was that same result as i have just mention , everything can ping each other but dhcp never works. please help

my understanding of the "ip helper-address" command is that in my situation i need to put is on the fa0/0 interfaces of my routers and using the address of the connected serial OR switch vlan address i dont know , And on my router 2 (middle router) so the serial interfaces need ip helper-address commands and if so what ip , the switch vlan ip?

i probably have completely messed up the switch vlan configs but please help thanks

i can post 'show run''s if needed , packet tracer file is here for download Mega File Upload - 4.pkt

Thanks please i need the help.

CertifiedMonkey

Switch2 Added Config

Switch(config)#ip default-gateway 10.9.0.2

R1 Added Config

R1>en
R1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#int f0/0
R1(config-if)#ip helper-address 10.9.0.1

R3 Added Config


R3#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#int f0/0
R3(config-if)#ip helper-address 10.9.0.1

The ip helper-address points to the IP address of the DHCP server. Your switch is 10.9.0.1, so you would use ip helper-address 10.9.0.1 on the F0/0 interfaces of both R1 and R3. Also, your switch was missing the ip default-gateway command which is why you were able to ping it locally but not remotely. Thanks for the refresher.

Hondabuff

This is how you will see most DHCP helper configs setup in a corp network.

http://www.filedropper.com/dhcp

satishtech

could anyone kindly post a screen shot of DHCPv6 configured on a server in PT