User guide

17-12 E
XTREME
W
ARE
S
OFTWARE
U
SER
G
UIDE
S
ERVER
L
OAD
B
ALANCING
(SLB)
The servers are configured as follows:
• All servers have the same MAC address.
• All server have the same IP address.
• All servers must have the same content.
The commands used to configure the switch as indicated in the example are as follows:
create vlan server
create vlan client
config server ipaddress 10.1.1.1 /24
config client ipaddress 1.1.1.1 /24
config server add port 29-32
config client add port 1-4
enable slb gogo 29 grouping 29-32
enable ipforwarding
Separating clients and servers into separate VLANs is not a requirement in GoGo mode.
VIP N
ETWORK
A
DVERTISEMENT
There are three methods for controlling network connectivity to the VIPs. Depending on
the subnet the VIP is a member of, the switch will adjust its behavior automatically.
• Proxy ARP
If the VIP is a member of an existing subnet the switch is directly attached to, the
switch will respond to ARP requests on behalf of the VIP. This behavior is known as
proxy ARP, and allows you to implement server load balancing on a layer 2
network. The VLAN containing the servers is a different subnet than the client
VLAN's subnet. The VIP will appear to be a member of the client subnet.
• Host-Route
If the VIP created is not a member of an existing subnet the switch is directly
attached to, a host-route entry will be added to the routing table for the switch. In
this situation all clients will need to have a routed path to the VIP which points to
the switch's IP address on the client VLAN.
• Subnet-Route
If your network configuration requires that the VIPs be propagated through a
routing protocol by the switch, you will need to create a loopback vlan with the
VIP(s) being valid members of the loopback VLAN's subnet. When a routing