# IOS Server Load Balancing (SLB)

Introducción

SLB

Dispatched mode (mac-rewrite)

r7200(config)#ip slb serverfarm telnet_srvfarm
r7200(config-slb-sfarm)#predictor leastconns
r7200(config-slb-sfarm)#real 192.168.1.1
r7200(config-slb-real)#weight 16
r7200(config-slb-real)#inservice
r7200(config-slb-sfarm)#real 192.168.1.2
r7200(config-slb-real)#inservice
r7200(config-slb-sfarm)#real 192.168.1.3
r7200(config)#ip slb vserver telnet_vserver
r7200(config-slb-vserver)#virtual 192.168.11.254 tcp telnet
r7200(config-slb-vserver)#serverfarm telnet_srvfarm
r7200(config-slb-vserver)#inservice

SRV1#show run | i ^interface|^ ip|^ip route
interface Loopback0
 ip address 192.168.11.254 255.255.255.255
interface FastEthernet0/0
 ip address 192.168.1.1 255.255.255.0
ip route 0.0.0.0 0.0.0.0 192.168.1.254

SRV2#show run | i ^interface|^ ip|^ip route
interface Loopback0
 ip address 192.168.11.254 255.255.255.255
interface FastEthernet0/0
 ip address 192.168.1.2 255.255.255.0
ip route 0.0.0.0 0.0.0.0 192.168.1.254

SRV3#show run | i ^interface|^ ip|^ip route
interface Loopback0
 ip address 192.168.11.254 255.255.255.255
interface FastEthernet0/0
 ip address 192.168.1.3 255.255.255.0
ip route 0.0.0.0 0.0.0.0 192.168.1.254

Directed mode (NAT)

r7200(config)#ip slb serverfarm telnet_srvfarm
r7200(config-slb-sfarm)#predictor leastconns
r7200(config-slb-sfarm)#nat server
r7200(config-slb-sfarm)#real 192.168.1.1
r7200(config-slb-real)#weight 16
r7200(config-slb-real)#inservice
r7200(config-slb-sfarm)#real 192.168.1.2
r7200(config-slb-real)#inservice
r7200(config-slb-sfarm)#real 192.168.1.3
r7200(config)#ip slb vserver telnet_vserver
r7200(config-slb-vserver)#virtual 192.168.11.254 tcp telnet
r7200(config-slb-vserver)#serverfarm telnet_srvfarm
r7200(config-slb-vserver)#inservice

SRV1#show run | i ^interface|^ ip|^ip route
interface FastEthernet0/0
 ip address 192.168.1.1 255.255.255.0
ip route 0.0.0.0 0.0.0.0 192.168.1.254

SRV2#show run | i ^interface|^ ip|^ip route
interface FastEthernet0/0
 ip address 192.168.1.2 255.255.255.0
ip route 0.0.0.0 0.0.0.0 192.168.1.254

SRV3#show run | i ^interface|^ ip|^ip route
interface FastEthernet0/0
 ip address 192.168.1.3 255.255.255.0
ip route 0.0.0.0 0.0.0.0 192.168.1.254