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dhcp-3.0.1-59.EL4.i386.rpmï¼
第äºèï¼é
ç½®DHCPåæºè´è½½åè¡¡
ç®åDHCP-Failoverï¼è½ç¶å«failoverï¼ä½å®é
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ç½®ä¸æ ·ï¼ä¾ç¶æ¯/etc/dhcpd.confï¼ä½åºäºæ¹ä¾¿ç®¡ççç®çï¼å¨é¨ç½²æ¶ï¼æ们æå°åæ± çé
ç½®æ¾å¨/etc/dhcpd.masteræ件ä¸ï¼ç¶åå¨/etc/dhcpd.confä¸è°ç¨ã
主èç¹ç/etc/dhcpd.confï¼
authoritative;
ddns-update-style interim;
ignore client-updates;
one-lease-per-client true;
failover peer "dhcp" {
primary;
address 10.14.0.9;
port 520;
peer address 10.14.0.13;
peer port 519;
max-response-delay 60;
max-unacked-updates 10;
mclt 600;
split 128;
load balance max seconds 3;
}
include "/etc/dhcpd.master";
次èç¹ç/etc/dhcpd.confï¼
authoritative;
ddns-update-style interim;
ignore client-updates;
one-lease-per-client true;
failover peer "dhcp" {
secondary;
address 10.14.0.13;
port 519;
peer address 10.14.0.9;
peer port 520;
max-response-delay 60;
max-unacked-updates 10;
}
include "/etc/dhcpd.master";
ã注æã
1ã两å°dhcp serverçæ¶é´å¿
é¡»åæ¥ï¼å¯ç¨ntp
2ãDhcp Failoverçäºç¸çå¬å°åå¯ä»¥éç¨ä¸ç¨ç½å¡äºç¸ç´è¿åå¿è·³çæ¹å¼ï¼çè³å¿è·³å¡å¯ä»¥èèåç½å¡ç»å®ï¼ä»è使çå¬åç½ç»æ°æ®æµåå¼ï¼å³ä½¿ç½ç»ä¸æ亦ä¸ä¼å æ¤å¯¼è´dhcpåæºä¸æï¼å¦ä¸æ示ï¼
è¿ç§æ¶åFailoverä¸ç¨æ¥å£æå¨ç½æ®µï¼å¯å¨å°åæ± ä¸å®ä¹ä¸ä¸ªç©ºæ± ï¼ä¸åä»»ä½å°ååé
æä½ï¼
subnet x.x.x.x netmask 255.255.255.248 {
}
æ¬æååºçé
ç½®æ¯éç¨å¿è·³åæ°æ®ç½å¡æ··ç¨çæ¹å¼ã
/etc/dhcpd.conf
主æ§æå¡å¨
authoritative;
ddns-update-style interim;
ignore client-updates;
one-lease-per-client true;
failover peer "dhcp" {
primary;
address 10.14.0.9;
port 520;
peer address 10.14.0.13;
peer port 519;
max-response-delay 60;
max-unacked-updates 20;
mclt 3600;
split 128;
load balance max seconds 3;
}
include "/etc/dhcpd.master";
说æ
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é¡»æ¯interim(æ¨è)ãad-hocæè
none
ã注2ãåå¦è¿ä¸ªæ å¿é
ç½®ætrueï¼enabledï¼ï¼å½ä¸ä¸ªå®¢æ·ç«¯åéä¸ä¸ªDHCPREQUESTä¿¡æ¯æ¥ç§ç¨ç§çº¦æ¶ï¼æå¡å¨ä¼èªå¨éæ¾ä»»ä½è¿ä¸ªå®¢æ·çä»»ä½å
¶ä»ç§çº¦ãæå¡å¨åå®å½ä¸ä¸ªå®¢æ·ç«¯åéDHCPREQUESTä¿¡æ¯æ¶ï¼ä»å·²å¿è®°ä»»ä½ä»æ²¡æå¨ DHCPREQUESTä¸æå°çç§çº¦ï¼ä¾å¦ï¼å®¢æ·ç«¯åªæ¯ä¸ªç®åçç½ç»æ¥å£ï¼ä¸è½è®°ä½åæ¥æ¥æèç°å¨ä¸ç¨çç§çº¦ãè¿äºåå®é½æ¯æ²¡æç¡®ä¿ï¼èä¸ä¸å¯è¯å®çï¼å æ¤å°å¿ä½¿ç¨è¿ä¸ªè¯å¥ã
ã注3ãå¦æè¿ä¸ªå¼ä¸å¤å¤§ï¼ä¼åçå°åæ± è¿æªåæ¥ç»æï¼å°±äº§çè¿æ¥ä¸æç°è±¡ãå¨æ¥æè¿1ä¸ä¸ªå°åæ± æ¶ï¼è¿ä¸ªå¼è¢«è®¾ä¸º180ã
/etc/dhcpd.master
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option domain-name-servers 10.14.0.9,10.14.0.13;
default-lease-time 21600;
max-lease-time 43200;
subnet 10.14.0.8 netmask 255.255.255.248 {
option routers 10.14.0.14;
pool {
failover peer "dhcp";
range 10.14.0.11 10.14.0.12;
deny dynamic bootp clients;
}
}
#shuniu
subnet 10.0.0.0 netmask 255.255.224.0 {
option routers 10.0.31.254;
pool {
failover peer "dhcp";
range 10.0.0.1 10.0.31.250;
deny dynamic bootp clients;
}
}
......
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ååæå¡å¨
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æ大ç§çº¦æ¶é´
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å±äºå为 dhcp çfailoverç»
å°åèå´ï¼å¯å¤æ¡range
æç»bootp客æ·ç«¯
第ä¸èï¼ç®¡çæä½
å¨ä¸¤ä¸ªèç¹ä¾æ¬¡å¯å¨dhcpæå¡ï¼å
主åå¤ã
# service dhcpd start
é
ç½®èªå¨å¯å¨
# chkconfig dhcpd on
éªè¯
# netstat -anutp | grep dhcpd
udp 0 0 0.0.0.0:67 0.0.0.0:* 6581/dhcpd
æ¥çå°åç§åä¿¡æ¯
# cat /var/lib/dhcp/dhcpd.leases
3.1ãç§çº¦æ件
dhcpdæ¯æ¬¡é½ä¼æææçç§åä¿¡æ¯åå°/var/lib/dhcpd.leasesæ件ä¸ï¼ä¸ä¸æ¬¡çç§åæ件被æ¹åædhcpd.leases~
3.2ãå°åæ± åæ¥
æ¯æ¬¡éå¯DHCPæå¡æ¶ï¼åæºé½ä¼èªå¨æ§è¡å°åæ± åæ¥æä½ã
å¨æ¬¡æå¡å¨ä¸ï¼
# service dhcpd congrestart
3.3ãæ¥çæ¥å¿ä¿¡æ¯
å¡æ¯æä»»ä½åDHCPæå¡å¨çå°ååé
æå
³çæ
éï¼é½å¯ä»¥éè¿æ¥çæ¥å¿æ件åæåºåå 并å¾ä»¥å¤çã
# tail -f /var/log/messages
å
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éç»å¤§é¨åæ¯ç±äºä½ä¸ºä¸è½¬çDHCP-RELAY设å¤é
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é
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2ãæ æ³å½¢æåæº
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