ip access-list extended LAN
permit udp any eq bootpc any eq bootps
permit ip 10.2.171.0 0.0.0.255 172.0.0.0 0.31.255.255
permit ip 10.2.171.0 0.0.0.255 10.2.0.0 0.0.255.255
permit tcp 10.2.171.0 0.0.0.255 host 78.136.60.154 eq 80
deny ip any any log
Permanent IP-address Mapping to a host MAC-address
ip dhcp pool “ name ”
host 192.168.4.8 255.255.255.240
client-identifier 0100.24b2.7fef.e7
client-name Comms-Networks
!
ip dhcp pool “ name ”
host 192.168.4.9 255.255.255.240
client-identifier 0100.1641.6CB3.26
client-name Comms-Networks
where 01 represents the Ethernet media type. Every request sent from a DHCP client to DHCP servers
contains a hardware type and a client hardware address. For Ethernet and 802.11 wireless clients, the
hardware type is always 01.
Some HP network printers/printservers (ethernet!) prepend 00 instead of 01. Some don’t
prepend anything so only hardware-address is working with them.
The client hardware address is simply the MAC address of the client’s network
(Ethernet or Wireless) interface. Every request sent from a DHCP client to DHCP servers may optionally
also contain a DHCP Client Identifier option.
debug;
ip dhcp server events
debug ip dhcp server packet
Cisco Dhcp Configuration :
ip dhcp excluded-address 10.10.10.250 10.10.10.254 ! ip dhcp pool DATA import all network 10.10.10.0 255.255.255.0 default-router 10.10.10.254 domain-name comms.co.uk dns-server 10.10.10.50 10.10.10.51 10.10.10.52 netbios-name-server 10.10.10.50 10.10.10.51 10.10.10.52 lease 0 2 update arp