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AppendixA:StateTablesforVPN-1/FireWall-14.0 Loadbalancingtables

AdvancedTechnicalReferenceGuide4.1•June2000 166

Example

attributes:expires180

<c0a83005,0000061f,c7cb471c,00000017,00000006,00000001;100/180>

Thelogical_requeststableusesthefollowingformat:

<sourceIPaddress,sourceport,destinationIPaddress,destinationport,IPprotocol,rulenumber;timeleft/total

time>

logical_servers_tabletable

Thelogical_servers_tabletableholdsalistofthelogicalservers.

Example

<c7cb471c;ffffffff,ffffffff>

<c0a83005;ffffffff,ffffffff>

<ffffffff,00000000;00000001>

Thelogical_servers_tabletableusesthefollowingformat:

<serverIPaddress;ffffffff,ffffffff>

<ffffffff,00000000;00000001>-terminatorentrywhichalwaysappearslastinthetable

Notethatonlylogicalserversthatareactuallyusedinruleswillappear.Eachmachinewillappearonce,evenif

themachineisusedinmorethanonelogicalserver.

logical_servers_list_tabletable

Thelogical_servers_list_tabletableincludesthelistoflogicalservers

Example

<c073cd1f,00000002,29dc9842;c0a81f0c,c0a81f0e,c0a81f1c>

<c073cd0c,00000003,4f77a384;c0a80c1c,c0a80c1f>

Thelogical_servers_list_tabletableusesthefollowingformat:

<logicalserverIPaddress,rulenumber,additionalkey;IPaddressofphysicalserver,IPaddressofphysical

server…>

Intheexamples,thefirstlogicalserverhastheIP192.115.205.31.Itisreferencedinrule2,isoftype“other”

(seeexplanationinfollowingparagraph)usesroundrobin,anddoesnotusecaching.Itsphysicalserversare

192.168.31.12,192.168.31.14and192.168.31.28.ThesecondlogicalserverhastheIP192.115.205.12.Itis

referencedinrule3,isoftype“HTTP”(seeexplanationinfollowingparagraph),usesdomainmethod,and

caching.

Theadditionalkeyfieldcontainseighthexadecimaldigitsthatshouldbeinterpretedasfourbytesoftheform

ghij.Bytesg,handitogetherformapointertotheobjectofthegroupofphysicalservers:

Thekeysarethelogicalserver’sIPaddress,therulenumber,andanadditionalkeywhosevalueisasfollows:

• Bits0-5oftherightmostbyte:Theloadbalancingmethod,a6-bitnumber(serverload=0,roundtrip=1,

roundrobin=2,random=3,domain=4).

• Bit6ofthatbyte:‘1’forHTTP,‘0’for‘OTHER’.

• Bit7ofthatbyte:doweusecaching.

• 3leftmostbytes:pointertotheobjectofthegroupofphysicalservers.