IBM eServer BladeCenter T8720 Installation And User Manual page 85

MAC
1a
1
1b
2a
2
2b
3a
3
3b
4a
4
4b
5a
5
5b
6a
6
6b
7a
7
7b
8a
8
8b
MAC
1a
1
1b
2a
2
2b
3a
3
3b
4a
4
4b
5a
5
5b
6a
6
6b
7a
7
7b
8a
8
8b
MAC
1a
1
1b
2a
2
2b
3a
3
3b
4a
4
4b
5a
5
5b
6a
6
6b
7a
7
7b
8a
8
8b
In this configuration, each BladeCenter T unit contains two Ethernet switch modules
and one management module. The external ports on the switch modules are
configured for multiport link aggregation groups, or trunks, as are the corresponding
ports on the attached external LAN switches. Additionally, every port in the switch
module in I/O-module bay 1 (switch A in this illustration) in the BladeCenter T units
is connected to the same external LAN switch, and every port in the switch module
in I/O-module bay 2 (switch B in this illustration) in the BladeCenter T units is
connected to another external LAN switch.
Observe the following guidelines when creating this topology:
1. The external ports on the BladeCenter T switch modules are designed for
point-to-point, full-duplex operation to a compatible LAN switch or router.
Configure a corresponding multiport link aggregation group, or trunk, in both the
switch module and the attached LAN switch before installing the cables. The
connection options are as follows, in order of preference:
v Multiport link aggregation group or trunk, 1 Gbps (1000 Mbps) per port
v Single-uplink port, 1 Gbps
v Multiport link aggregation group or trunk, 100 Mbps per port
2. Connect the management-module 10/100 Mbps Ethernet port to a separate
layer 2 network for security. If a separate network is not available, you can
attach the Ethernet ports of the management module and switch modules to the
same layer 2 network.
3. Avoid network configurations that could lead to data loops, if possible. Loops
will be created if you connect multiple ports from the same switch module to the
same layer 2 network device without first enabling link aggregation. If you
Multiport aggregation group
1 Gbps or 100 Mbps links
Switch A
L2 Switch
Mgmt
Mod
10/100 Mbps
management
links
Switch B
L2+ Switch
Switch A
Dual
external
switches
Mgmt
Mod
L2+ Switch
Switch B
Switch A
Mgmt
Mod
Switch B
Chapter 5. Configuring the BladeCenter T unit
IBM Director
- Chassis management
- Application deployment
- Internal switches
Establishment
backbone
Network administrator
- Infrastructure
management
- Network hardware
and software
71