Sun Microsystems Ethernet MMF/UTP Adapter To Configure Static VLANs, 2Ethernet Tag Header Format

FIGURE 5-2

IP subnets when setting up a VLAN network interface. This means that each VID assigned to a VLAN interface of a physical network interface will belong to different subnets.

Tagging an Ethernet frame requires the addition of a tag header to the frame. The header is inserted immediately following the destination MAC address and the source MAC address. The tag header consists of two bytes of Ethernet Tag Protocol identifier (TPID, 0x8100) and two bytes of tag control information (TCI).

shows the Ethernet tag header format.

					Octet
		TPID (0x8100				1
						2
	3 bits		1	12 bytes		3
			bit			4
User_		priority
			CFI	VID

FIGURE 5-2Ethernet Tag Header Format

By default a single VLAN is configured for every port, which groups all ports into the same broadcast domain, just as if there were no VLANs at all. This means that VLAN tagging for the switch port is turned off.

Note – If you configure a VLAN virtual device for an adapter, all traffic sent or received by that adapter must be in VLAN-tagged format.

▼To Configure Static VLANs

1.Create one hostname6.ipgenumber file for each VLAN that will be configured for each adapter on the server.

Use the following naming format, which includes both the VID and the physical point of attachment (PPA):

VLAN logical PPA = 1000 * VID + Device PPA ipge123000 = 1000*123 + ipge

This format limits the maximum number of PPAs (instances) you can configure to 1000 in the /etc/path_to_inst file.

For example, on a server with the Sun 10-Gigabit Ethernet adapter having an instance of 0, belonging to a member of two VLANs, with VID 123 and 224, you would use ipge123000 and ipge224000, respectively, as the two VLAN PPAs.

60 Sun PCI-Express Dual Gigabit Ethernet MMF/UTP Adapter Installation and User’s Guide • June 2006