Specifications

186 Implementing IBM System Networking 10Gb Ethernet Switches
5.3 Layer 3
This section provides configuration background information for using the RackSwitch G8124
and RackSwitch G8264 switches to perform IP routing functions. Any differences between
the models regarding the availability of certain software features or command syntax
are highlighted.
All the configurations presented in this chapter are implemented by using the IBM Networking
OS V6.8software installed in the reference architecture switches. For planning details and the
network diagrams used for implementation, see Chapter 3, “Reference architectures” on
page 107
Not all the Layer 3 functions available in IBM Networking OS V6.8 are covered in this section.
For an extensive list of features and configuration guidelines, see the documentation links
listed in 5.5, “More information” on page 238.
The following topics are addressed in this chapter:
򐂰 Basic IPv4 configuration
򐂰 Basic IPv6 configuration
򐂰 OSPF configuration
򐂰 BGP configuration
5.3.1 Basic IPv4 configuration
The switches use a combination of configurable IP switch interfaces and IP routing options.
The switches IP routing capabilities provide the following benefits:
򐂰 Connects the server IP subnets to the rest of the backbone network.
򐂰 Routes IP traffic between multiple VLANs configured on the switch.
This section covers configuration steps and commands for implementing basic routing
between subnets using IP interfaces assigned to VLANs, default gateways, and static routes.
IP interfaces
The RackSwitch G8264 and RackSwitch G8124 switches support up to 128 IP interfaces.
Each IP interface represents the switch on an IP subnet on the network. The Interface option
is disabled by default.
In the RackSwitch G8264 switch, interface 128 is reserved for switch management on the
MGT port.
In the RackSwitch G8124 switch, interface 127 and interface 128 are reserved for switch
management, as follows:
򐂰 IF 127: Management port B
򐂰 IF 128: Management port A
To configure and enable an IP interface, complete the following steps:
1. Complete the VLAN selection.
An IP interface must be mapped to a VLAN. Select one of the VLANs configured in the
5.2.1, “VLANs” on page 163 to apply an IP configuration to.
VLAN 100 is used in this example. Perform the same configuration for all the VLANs,
according to the input information in Chapter 3, “Reference architectures” on page 107.