完全手冊之ADSL負載均衡配置
作者：佚名
本文介紹了雙ADSL下的NTH的負載均衡設置問題。包括普通腳本，nat，還有IP等相關內容。那么，具體的代碼，請從下文中參考。
說了很多關于數據庫，服務器等負載均衡問題?，F在，我們來討論一下ADSL的負載均衡設置。主要我們需要對腳本進行“改造”，也就是NTH負載均衡的設置問題，文中包括很多腳本代碼，希望大家能仔細的瀏覽，幫大家解決問題。
建立PPP撥號，把其中一條撥號名命名為ADSL1，另一個命明為ADSL2，并把內網網卡命名為LAN，然后等待撥號成功，設置參考下圖
撥號成功后，PPPOE會自動添加IP地址和網關,找到地址和網關，復制下來，替換到下面腳本中，把A1IP替換成ADSL1的IP，A1網關替換成ADSL1的網關，把A2IP替換成ADSL2的IP，A2網關替換成ADSL2的網關.之后慢慢添腳本，添完成功后，把撥號的Add Default Route的勾去掉，看負載均衡是否可以正常工作！#p#
1.普通腳本設置
- / ip firewall nat
- add chain=srcnat action=masquerade comment="3" disabled=yes
- / ip address
- add address=A1IP interface=ADSL1 comment="1" disabled=no
- add address=A2IP interface=ADSL2 comment="2" disabled=no
- / ip route
- add dst-address=0.0.0.0/0 gateway=A1網關 routing-mark=1 comment="1"
- add dst-address=0.0.0.0/0 gateway=A2網關 routing-mark=2 comment="2"
- add dst-address=0.0.0.0/0 gateway=A1網關 comment="3"
2.添加NAT，NTH腳本
- / ip firewall mangle
- add chain=prerouting in-interface=LAN protocol=tcp connection-state=new nth=1,1,0 action=mark-connection \
- new-connection-mark=1 passthrough=yes comment="A1 NTH" disabled=no
- add chain=prerouting in-interface=LAN protocol=tcp connection-mark=1 action=mark-routing new-routing-mark=1 \
- passthrough=no comment="A1 NTH" disabled=no
- add chain=prerouting in-interface=LAN protocol=tcp connection-state=new nth=1,1,1 action=mark-connection \
- new-connection-mark=2 passthrough=yes comment="A2 NTH" disabled=no
- add chain=prerouting in-interface=LAN protocol=tcp connection-mark=2 action=mark-routing new-routing-mark=2 \
- passthrough=no comment="A2 NTH" disabled=no
- / ip firewall nat
- add chain=srcnat connection-mark=1 action=src-nat to-addresses=A1IP to-ports=0-65535 comment="1" disabled=no
- add chain=srcnat connection-mark=2 action=src-nat to-addresses=A2IP to-ports=0-65535 comment="2" disabled=no
#p#3.同步NAT，ADSL動態IP，網關腳本:位置winbox-system-script 點“+ ”號，改name為sync，然后復制下面的腳本到source里
- :local assign-address
- :local new-address
- :local status
- :local x
- :set x 2
- :for i from=1 to=$x do={
- :set status [/interface get [/interface find name=("ADSL" . $i)] running]
- :if ($status=true) do={
- :set new-address [/ip address get [/ip address find dynamic=yes interface=("ADSL" . $i)] address]
- :set new-address [:pick $new-address 0 ([:len $new-address] -3)]
- :set assign-address [/ip address get [/ip address find dynamic=no interface=("ADSL" . $i)] address]
- :set assign-address [:pick $assign-address 0 ([:len $assign-address] -3)]
- :set new-gateway [/ip address get [/ip address find dynamic=yes interface=("ADSL" . $i)] network]
- :set adckip [/tool netwatch get [/tool netwatch find comment=$i] host]
- :if ($assign-address != $new-address) do={ /ip address set [/ip address find comment=$i] address=$new-address network=$new-address broadcast=$new-address
- /ip route set [/ip route find comment=$i] gateway=$new-gateway]
- /ip firewall nat set [/ip firewall nat find comment=$i] to-addresses=$new-address
- /ip route set [/ip route find comment=$i] gateway=$new-gateway]
- }
- :if ($new-gateway != $adckip) do={/tool netwatch set [/tool netwatch find comment=$i] host=$new-gateway]
- }
- }
- }
4.添加ADSL1當線腳本A1Down，自動停用NTH負載均衡所需的參數，并將標記3的網關設為ADSL2的網關，位置winbox-system-script 點“+ ”號，改name為A1Down，然后復制下面的腳本到source里
- :local new-gateway
- :set new-gateway [/ ip address get [/ip address find dynamic=yes interface=ADSL2] network]
- /ip route set [/ip route find comment=3] gateway=$new-gateway
- /ip route enable [/ip route find comment=3]
- /ip route disabled [/ip route find comment=1]
- /ip route disabled [/ip route find comment=2]
- /ip firewall nat enable [/ip firewall nat find comment=3]
- /ip firewall nat disabled [/ip firewall nat find comment=1]
- /ip firewall nat disabled [/ip firewall nat find comment=2]
5.添加ADSL2當線腳本A2Down，自動停用NTH負載均衡所需的參數，并將標記3的網關設為ADSL1的網關，位置winbox-system-script 點“+ ”號，改name為A2Down，然后復制下面的腳本到source里
- :local new-gateway
- :set new-gateway [/ ip address get [/ip address find dynamic=yes interface=ADSL1] network]
- /ip route set [/ip route find comment=3] gateway=$new-gateway
- /ip route enable [/ip route find comment=3]
- /ip route disabled [/ip route find comment=1]
- /ip route disabled [/ip route find comment=2]
- /ip firewall nat enable [/ip firewall nat find comment=3]
- /ip firewall nat disabled [/ip firewall nat find comment=1]
- /ip firewall nat disabled[/ip firewall nat find comment=2]
#p#6.添加ADSL掉線判斷NETWATCH
- / tool netwatch
- add host=A1網關 timeout=1s interval=1m up-script="" down-script="A1Down" comment="1"
- add host=A2網關 timeout=1s interval=1m up-script="" down-script="A2Down" comment="2"
7.添加雙線判斷正常腳本allup。即兩條線路UP的時候開啟NTH負載均衡。位置winbox-system-script 點“+ ”號，改name為allup，然后復制下面的腳本到source里
- :global a
- :global b
- :set a [/tool netwatch get [/tool netwatch find comment=1] status]
- :set b [/tool netwatch get [/tool netwatch find comment=2] status]
- :if (($a="up") && ($b="up")) do={
- /ip route disabled [/ip route find comment=3]
- /ip route enable [/ip route find comment=1]
- /ip route enable [/ip route find comment=2]
- /ip firewall nat disabled [/ip firewall nat find comment=3]
- /ip firewall nat enable [/ip firewall nat find comment=1]
- /ip firewall nat enable [/ip firewall nat find comment=2]}
8.添加腳本計劃任務
- / system scheduler
- add name="tasksync" on-event=sync start-date=jan/01/1970 start-time=00:00:00 interval=10s comment=""
- add name="taskup" on-event=allup start-date=jan/01/1970 start-time=00:00:00 interval=10s comment=""
責任編輯：佟健
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