Alteon Application Switch Operating System Application Guide
Server Load Balancing
230 Document ID: RDWR-ALOS-V2900_AG1302
6. Because a session cookie does not exist in the first request of an HTTP session, a default server
group is needed to assign cookies to a None cookie HTTP request. Create a server group
containing designated servers for example servers 1 through 10, and associate it to the HTTP
virtual service as the fallback group.
Using this example, the following results:
— Request 1 comes in with no cookie. It is load balanced between servers in Group 15 (Real
Servers 1 through 10) to receive a response and a cookie assigned.
— Request 2 comes in with a "Gold" cookie; it is load balanced between servers in Group 10
(Real Servers 1 through 4).
— Request 3 comes in with a "Silver" cookie; it is load balanced between servers in Group 11
(Real Servers 5 through 8).
— Request 4 comes in with a "Bronze" cookie; it is load balanced between servers in Group 12
(Real Servers 9 through 10).
>> HTTP Content Rule 10# group
Current real server group: 1
Enter new real server group [1-1024]: 10
>> Main# /cfg/slb/virt 10/service http
------------------------------------------------------------
[Virtual Server 10 80 http Service Menu]
name - Set descriptive virtual service name
http - HTTP Load Balancing Menu
cntrules - Content Based Services Rules Menu
action - Set action type of this service
group - Set real server group number
redirect - Set application redirection location
rport - Set real port
hname - Set hostname
cont - Set BW contract for this virtual service
pbind - Set persistent binding type
thash - Set hash parameter
tmout - Set minutes inactive connection remains open
ptmout - Set in minutes for inactive persistent connection
dbind - Enable/disable/forceproxy delayed binding
nonat - Enable/disable only substituting MAC addresses
direct - Enable/disable direct access mode
mirror - Enable/disable session mirroring
epip - Enable/disable pip selection based on egress port/vlan
winsize0 - Enable/disable using window size zero in SYN+ACK
ckrebind - Enable/disable server rebalancing when cookie is absent
del - Delete virtual service
cur - Display current virtual service configuration
>> Virtual Server 10 80 http Service# action
Current action type of this service: group
Enter new action type of this service [group|redirect|discard]: group
For load balancing group updates use /cfg/slb/virt/service/group
>> Virtual Server 10 80 http Service# group
Current real server group: 1
Enter new real server group [1-1024]: 15
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