Planet XGS3-42000R User Manual page 243

The following is the configuration of Switch3(MA C address is 00:03:0f:02:33:01):
Switch3(config)#service dhcp
Switch3(config)#ip dhcp relay information option
Switch3(config)#ip forward-protocol udp bootps
Switch3(Config-if-vlan3)#ip address 192.168. 10.222 255.255.255.0
Switch3(Config-if-vlan2)#ip address 192.168. 102. 2 255.255.255. 0
Switch3(Config-if-vlan2)#ip helper 192.168.10.88
Linux IS C DHCP Server supports option 82, its configuration file /etc/dhcpd.con is ddns-update-style interim;
ignore client-updates;
class "Switch3Vlan2Class1" {
match if option agent.circuit-id = "Vlan2+Ethernet1/2" and option agent.remote-id=00:03:0f:02: 33:01;
}
class "Switch3Vlan2Class2" {
match if option agent.circuit-id = "Vlan2+Ethernet1/3" and option agent.remote-id=00:03:0f:02: 33:01;
}
subnet 192.168.102.0 netmask 255.255.255.0 {
option routers 192.168. 102. 2;
option subnet -mask 255. 255.255.0;
option domain-name "example.com.cn";
option domain-name-servers 192.168.10.3;
authoritative;
pool {
range 192.168.102.21 192.168. 102. 50;
default-lease-time 86400; #24 Hours
max-leas e-time 172800; #48 Hours
allow members of "Switch3Vlan2Class1";
}
pool {
range 192.168.102.51 192.168. 102. 80;
default-lease-time 43200; #12 Hours
max-leas e-time 86400; #24 Hours
allow members of "Switch3Vlan2Class2";
}
}
Now, the DHCP server will allocate addresses for the network nodes from Switch1 which are relay ed by
Switch3 within the range of 192.168.102.21 ~ 192.168.102. 50, and allocate addresses for the network nodes
from Switch1 wit hin the range of 192.168.102.51～192.168.102.80.
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