Znyx Networks bh5700 manual Multiple VLANs

Figure 7.1: Multiple VLANs

Tagging and Untagging VLANs

The OpenArchitect switch is capable of switching VLAN tagged and untagged data packets. VLAN tagged packets conform to the 802.1q specification and the packet header contains an additional four bytes of VLAN tag information. A given port can be specified to accept VLAN tagged or untagged traffic. Internally, all traffic for a particular VLAN is treated as tagged traffic.

Switch Port Interfaces

For each switch port, OpenArchitect creates a separate interface with its own MAC address called a ZNYX raw Ethernet (zre). After the initial power up, 24 zre interfaces are created, one for each in band port. You cannot directly access or modify the zre interfaces.

During the initial power up of the switch, the default configuration creates a Layer 2 switch. The Layer 2 configuration places all of the zre interfaces in the same zhp interface. The number after zre represents the corresponding switch port number (that is, zre1 represents port 1 on the switch).

Layer 2 Switch Configuration

The steps to build a Layer 2 switch involve creating a group of switch ports in a VLAN (or Layer 2 switching domain) and bringing that interface up. zconfig creates the VLAN group of switch ports as well as a network interface. Use ifconfig(1M) on the network interface to bring up the VLAN group. Figure 7.2 provides an illustration of a Layer 2 Switch connection.

Ethernet Switch Blade User's Guide release 3.2.2j page 94