A collocated server is server software installed on the Load Balancer system.A stand-alone server refers to server software not installed on a Load Balancer machine.The procedure to alias the cluster to the interface depends on the environment: Alias the cluster addresses to the correct interface.Sysctl -w .rp_filter=0įor each interface (replace interface_name with actual value): Configure ipv4 settings to allow the server to send responses that use the cluster address:.Ensure the kernel does not advertise addresses on the loopback interface: sysctl -w .arp_ignore=3 .arp_announce=2.Here are some helpful commands to see your current settings. However, if a collocated server is defined, the Load Balancer creates a special tunnel interface named ibmulb. The collocated server and the Load Balancer compete for resources and cause degraded performance and response time. Servers on the same machine as a Load Balancer are called collocated servers. Collocated servers are not recommended. ![]() To allow this behavior, the cluster address is added to the loopback device on the back-end servers as shown: When the MAC forwarding method is configured with WebSphere ® Edge Load Balancer, you must ensure that cluster-addressed traffic can be accepted by the stacks of the back-end servers. The Linux™ operating system employs a host-based model of advertising hardware addresses to IP addresses with the Address Resolution Protocol (ARP). This model is incompatible with the back-end server or collocated server requirements for Load Balancer's Media Access Control (MAC) forwarding method. ![]() ![]() Why is configuring MAC and encapsulated MAC forwarding for WebSphere ® Edge Load Balancer different on Linux™?
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