DHCP Realy failed

[victor-gutierrez]

Hi everyone 

Hope u´re great, I really need help, I got a topology 3 routers OSPF is running well, on router 2 I configured a DHCP, on router 1 Gi0/0/0  its a ip helper address pointing to Router 2, but DHCP failed, someone can help me  pls 

[balaji.bandi]

How is your switch config ? is the switch also participate in IGP (OSPF) ?

in the DHCP you have 192.168.2.0/24 - you should have default-router in same subnet 192.168.2.1

that can be created on Router or on the switch - so make sure you have routing in place to reach the 192.168.2.0/24 subnet.

default-router 192.168.2.1

Then on switch side you can have trunk associated VLAN

[M02@rt37]

Hello @victor-gutierrez 

Ensure to configure Ronter On A Stick on Gig0/0/0 Router1 facing Switch3. Same on Gig 0/0/0/1 facing Switch.

Follow this:

https://www.ciscopress.com/articles/article.asp?p=3089357&seqNum=5

On th sub interface dedicated to the vlan of PCs, add the ip helper-address command.