Specifications

Chapter 5. Planning 129
– Virtual Link Aggregation Groups (VLAG)
– Virtual Router Redundancy Protocol (VRRP)
– Routing protocol (such as RIP or OSPF)
Redundant network topologies
The IBM Flex System Enterprise Chassis can be connected to the enterprise
network in several ways, as shown in Figure 5-1.
Figure 5-1 IBM Flex System redundant LAN integration topologies
Topology 1 in Figure 5-1 has each switch module in the chassis directly
connected to one of the enterprise switches through aggregation links, using
external ports on the switch. The specific number of external ports used for link
aggregation depends on your redundancy requirements, performance
considerations, and real network environments. This topology is the simplest way
to integrate IBM Flex System into an existing network, or to build a new one.
Compute node
Enterprise
Chassis
NIC 2
NIC 1
Switch 1
Enterprise
Switch 1
Enterprise
Switch 2
Switch 2
Rest of
Network
Compute node
NIC 2
NIC 1
Switch 1
Enterprise
Switch 1
Enterprise
Switch 2
Switch 2
Rest of
Network
Trunk
Topology 1
Topology 2
Enterprise
Chassis