In this example, a DHCP relay server is set up using various DHCP server and DHCP relay commands and options from the preceding sections. The example connects port 1 of switch 1 to port 1 of switch 2, and connects port 2 of switch 2 to port 1 of switch 3.
SEFOS# configure terminal SEFOS(config)# vlan 2 SEFOS(config-vlan)# ports extreme-ethernet 0/1 SEFOS(config-vlan)# exit SEFOS(config)# interface vlan 2 SEFOS(config-if)# shutdown SEFOS(config-if)# ip address 20.0.0.1 255.0.0.0 SEFOS(config-if)# no shutdown SEFOS(config-if)# exit SEFOS(config)# interface extreme-ethernet 0/1 SEFOS(config-if)# switchport pvid 2 SEFOS(config-if)# exit SEFOS(config)# ip route 30.0.0.0 255.0.0.0 vlan 2 SEFOS(config)# end
SEFOS# show ip interface vlan 2 vlan2 is up, line protocol is up Internet Address is 20.0.0.1/8 Broadcast Address 20.255.255.255 SEFOS# show vlan id 2 Vlan database ------------- Vlan ID : 2 Member Ports : Ex0/1 Untagged Ports : None Forbidden Ports : None Name : Status : Permanent ---------------------------------------------------- SEFOS# show ip route Codes: C - connected, S - static, R - rip, B - bgp, O - ospf C 10.0.0.0/8 is directly connected, vlan1 C 20.0.0.0/8 is directly connected, vlan2 S 30.0.0.0/8 is directly connected, vlan2
SEFOS# configure terminal SEFOS(config)# vlan 2 SEFOS(config-vlan)# ports extreme-ethernet 0/1 SEFOS(config-vlan)# exit SEFOS(config)# interface vlan 2 SEFOS(config-if)# shutdown SEFOS(config-if)# ip address 20.0.0.2 255.0.0.0 SEFOS(config-if)# no shutdown SEFOS(config-if)# exit SEFOS(config)# interface extreme-ethernet 0/1 SEFOS(config-if)# switchport pvid 2 SEFOS(config-if)# exit SEFOS(config)# vlan 3 SEFOS(config-vlan)# ports extreme-ethernet 0/2 untagged extreme-ethernet 0/2 SEFOS(config-vlan)# exit SEFOS(config)# interface vlan 3 SEFOS(config-if)# shutdown SEFOS(config-if)# ip address 30.0.0.2 255.0.0.0 SEFOS(config-if)# no shutdown SEFOS(config-if)# exit SEFOS(config)# interface extreme-ethernet 0/2 SEFOS(config-if)# switchport pvid 3 SEFOS(config-if)# no shutdown SEFOS(config-if)# end SEFOS# show vlan id 2 Vlan database ------------- Vlan ID : 2 Member Ports : Ex0/1 Untagged Ports : None Forbidden Ports : None Name : Status : Permanent ---------------------------------------------------- SEFOS# show vlan id 3 Vlan database ------------- Vlan ID : 3 Member Ports : Ex0/2 Untagged Ports : Ex0/2 Forbidden Ports : None Name : Status : Permanent ---------------------------------------------------- SEFOS# show ip interface vlan 2 vlan2 is up, line protocol is up Internet Address is 20.0.0.2/8 Broadcast Address 20.255.255.255 SEFOS# show ip interface vlan 3 vlan3 is up, line protocol is up Internet Address is 30.0.0.2/8 Broadcast Address 30.255.255.255
Since the client is in vlan 3, an address pool with the 30.0.0.0 network must be configured in the server.
SEFOS# configure terminal SEFOS(config)# service dhcp-server SEFOS(config)# ip dhcp pool 1 SEFOS(dhcp-config)# network 30.0.0.0 SEFOS(dhcp-config)# lease 0 0 30 SEFOS(dhcp-config)# end SEFOS# show ip dhcp server information DHCP server status : Enable Send Ping Packets : Disable Debug level : None Server Address Reuse Timeout : 5 secs Next Server Adress : 0.0.0.0 Boot file name : SEFOS# show ip dhcp server pools Pool Id : 1 ---------------------------------- Subnet : 30.0.0.0 Subnet Mask : 255.0.0.0 Lease time : 1800 secs Utilization threshold : 75% Start Ip : 30.0.0.1 End Ip : 30.255.255.255
This action connects the networks between the client and server.
SEFOS# configure terminal SEFOS(config)# service dhcp-relay SEFOS(config)# end SEFOS# show ip dhcp relay information Dhcp Relay : Enabled Dhcp Relay Servers only : Disabled DHCP server : 0.0.0.0 Dhcp Relay RAI option : Disabled Debug Level : 0x1 No of Packets inserted RAI option : 0 No of Packets inserted circuit ID suboption : 0 No of Packets inserted remote ID suboption : 0 No of Packets inserted subnet mask suboption : 0 No of Packets dropped : 0 No of Packets which did not inserted RAI option : 0
This example uses a SPARC computer running Oracle Solaris 10 OS as the DHCP client. The dual 10-Gigabit Ethernet XFR SR network interface card (option X1109A-Z) is installed in the SPARC computer and uses the instance ixgbe. The DHCP daemon is active in Oracle Solaris 10 by default, so no DHCP configuration is needed.
See Multiple-Switch Configuration. Issue the following commands after connecting the cables. If a different DHCP client is used, follow the appropriate instructions in the administration guide for the client.
# ifconfig ixgbe1 plumb up
# ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
e1000g0: flags=1000803<UP,BROADCAST,MULTICAST,IPv4> mtu 1500 index 2
inet 10.7.58.46 netmask ffffff00 broadcast 10.7.58.255
ether 0:14:4f:20:f4:cc
ixgbe1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 12
inet 0.0.0.0 netmask ff000000
ether 0:1b:21:4a:6f:fc
# ifconfig ixgbe1 dhcp
# ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
e1000g0: flags=1000803<UP,BROADCAST,MULTICAST,IPv4> mtu 1500 index 2
inet 10.7.58.46 netmask ffffff00 broadcast 10.7.58.255
ether 0:14:4f:20:f4:cc
ixgbe1: flags=1004843<UP,BROADCAST,RUNNING,MULTICAST,DHCP,IPv4> mtu 1500 index 12
inet 30.0.0.1 netmask ff000000 broadcast 30.255.255.255
ether 0:1b:21:4a:6f:fc
SEFOS# show ip dhcp server binding Ip Hw Hw Binding Expire Address Type Address State Time ------- ------- ------ -------- ---------- 30.0.0.1 Ethernet 00:1b:21:4a:6f:fc Assigned Apr 10 11:39:28 2010