Ports and trunking 32
• You cannot configure a trunk member as a monitor port in a Port Mirroring configuration.
• A monitor port cannot monitor trunks; however, trunk members can be monitored.
Port trunking example
In this example, the Gigabit uplink ports on each switch, and the crosslink ports are configured into a total of five
trunk groups: two on each switch, and one trunk group at the crosslink between the two switches. All ports operate at
Gigabit Ethernet speed.
NOTE: The actual mapping of switch ports to NIC interfaces is dependant on the operating system software,
the type of server blade, and the enclosure type. For more information, see the HP GbE2c Ethernet Blade
Switch for c-Class BladeSystem User Guide.
Figure 1 Port trunk group configuration example
The trunk groups are configured as follows:
• Trunk group 1 is configured by default on the crosslink ports 17 and 18, which connect the switches 1 and 2
together. Since this is the default configuration, you do not need to configure trunk group 1 on either switch. By
default, ports 17 and 18 are disabled.
• Trunk groups 2-5 consist of two Gigabit uplink ports each, configured to act as a single link to the upstream
routers. The trunk groups on each switch are configured so that there is a link to each router for redundancy.
Prior to configuring each switch in this example, you must connect to the appropriate switch CLI as the administrator.
For details about accessing and using any of the commands described in this example, see the HP GbE2c Ethernet
Blade Switch for c-Class BladeSystem Command Reference Guide.
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