Alteon Application Switch Operating System Application Guide
High Availability
Document ID: RDWR-ALOS-V2900_AG1302 531
2. Define the VLANs. In this configuration, set up two VLANs:
— One for the outside world—the ports connected to the upstream devices, toward the routers
(VLAN 3 in Figure 78 - Active-Standby Configuration, page 522).
— One for the inside—the ports connected to the downstream devices, toward the servers
(VLAN 2 in Figure 78 - Active-Standby Configuration, page 522
).
Repeat this command for the second VLAN:
— VLAN 3 (interface 5)—Physical ports connected to upstream devices.
— VLAN 2 (interfaces 1, 2, 3, and 4)—Physical ports connected to downstream devices.
3. Disable Spanning Tree.
4. Enable IP forwarding. IP forwarding is enabled by default. Make sure IP forwarding is enabled if
the virtual server IP addresses and real server IP addresses are on different subnets, or if the
device is connected to different subnets and those subnets need to communicate through the
device. If you are not sure whether to enable IP forwarding, enable it. In this example, the
virtual server IP addresses and real server IP addresses are on different subnets, so it should be
enabled:
To configure SLB
In this procedure, you perform the following:
• Define real servers
• Define real server groups
• Define virtual servers
• Define client and server port states
1. Define the real servers.
The real server IP addresses are defined and put into four groups, depending on the service they
are running. Notice that RIPs 7 and 8 are on routable subnets in order to support passive FTP.
For each real server, you must assign a real server number, specify its actual IP address, and
enable the real server:
>> Main# /cfg/l2/vlan vlan 3
(Select VLAN 3)
>> vlan 3 # add <port number>
(Add a port to the VLAN
membership)
>> vlan 3 # ena
(Enable VLAN 3)
>> Main# /cfg/l2/stg 1
(Select the STP Group
number)
>> Main# /cfg/l2/stg 1/off
(Disable STP)
>> Main# /cfg/l2/stg 1/apply
(Make your changes active)
>> Main# /cfg/l3/frwd/on
>> Main# /cfg/slb/real 1
(Server A is Real Server 1)
>> Real server 1 # rip 10.10.10.5
(Assign Server A IP address)
>> Real server 1 # ena
(Enable Real Server 1)
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