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Configuring Server Load Balancing
IOS SLB Configuration Task List
IPC-148
Cisco IOS IP Configuration Guide
VS1 TCP 10.10.10.12:23 INSERVICE 2
VS2 TCP 10.10.10.18:23 INSERVICE 2
Router# show ip slb vservers detail
VS1, state = INSERVICE, v_index = 10
virtual = 10.10.10.12:23, TCP, service = NONE, advertise = TRUE
server farm = SERVERGROUP1, delay = 10, idle = 3600
sticky timer = 0, sticky subnet = 255.255.255.255
sticky group id = 0
synguard counter = 0, synguard period = 0
conns = 0, total conns = 0, syns = 0, syn drops = 0
standby group = None
VS2, state = INOFSERVICE, v_index = 11
virtual = 10.10.10.18:23, TCP, service = NONE, advertise = TRUE
server farm = SERVERGROUP2, delay = 10, idle = 3600
sticky timer = 0, sticky subnet = 255.255.255.255
sticky group id = 0
synguard counter = 0, synguard period = 0
conns = 0, total conns = 0, syns = 0, syn drops = 0
standby group = None
Verifying IOS SLB
The following sections describe how to verify the following different aspects of the IOS SLB feature:
• Verifying IOS SLB Installation
• Verifying Server Failure Detection
Verifying IOS SLB Installation
To verify that the IOS SLB is installed and working properly, perform the following steps:
Step 1 Telnet to the IOS SLB device.
Step 2 Ping from that device to each of the clients and real servers. If it is not precluded by firewalls or network
configuration, ping from the client side to each of the real servers.
Step 3 From the client side, ping the virtual server. Pings are answered by IOS SLB even if no real servers are
in service, so this ensures that the IOS SLB device is reachable.
Step 4 For the selected protocol, start a client connection to the virtual server.
Step 5 If you want sticky connections, perform the following steps:
a. Configure the sticky connections.
b. Start a client connection.
c. Enter the show ip slb reals detail and show ip slb conns EXEC commands.
d. Examine the real server connection counts. The real server whose count increased is the one to
which the client connection is assigned.
e. Enter the show ip slb sticky EXEC command to display the sticky relationships that IOS SLB
stored.
f. End the connection.
g. Ensure that the connection count of the real server decreased.