CCNA Notes
CompTIA LX103
Cisco ICND1
Cisco ICND2
- Topics
- To
- Be
- Added
Cisco CCNP Route
Various
Labs
CompTIA LX103
Cisco ICND1
Cisco ICND2
Cisco CCNP Route
Various
Labs
This is an old revision of the document!
Use DHCP to address automatic IP assignment within a network.
Below is the configuration for DHCP in Cisco's IOS.
R1#sh run | s dhcp ip dhcp excluded-address 192.168.0.1 192.168.0.49 ip dhcp pool MYNETWORK network 192.168.0.0 255.255.255.0 default-router 192.168.0.1 R1#
Relays are configured with ip helper-address x.x.x.x to specify which address to forward received DHCP requests. When our RTR forwards a DHCP request out via Relay, it does so with the SOURCE ADDRESS of the INTERFACE the HELPER-ADDRESS command was configured on. When this happens, the DHCP server can look at the SOURCE ADDR of the packet, and know exactly which scope to lease an address from - the same network that source resides in, ofc.