Accton Technology ES3628EA manual 4 Making VLAN Connections

Application Examples 2

Making VLAN Connections

This switch supports VLANs which can be used to organize any group of network nodes into separate broadcast domains. VLANs confine broadcast traffic to the originating group, and can eliminate broadcast storms in large networks. This provides a more secure and cleaner network environment.

VLANs can be based on untagged port groups, or traffic can be explicitly tagged to identify the VLAN group to which it belongs. Untagged VLANs can be used for small networks attached to a single switch. However, tagged VLANs should be used for larger networks, and all VLANs assigned to the inter-switch links.

This switch also supports multiple spanning trees which allow VLAN groups to maintain a more stable path between all VLAN members. This can reduce the overall amount of protocol traffic crossing the network, and provide a shorter reconfiguration time when any link in the spanning tree fails.

At Layer 3, VLANs are used to create an IP interface, where one or more ports are assigned to the same IP segment. Traffic is automatically routed between different IP segments on the same switch, without any need to configure routing protocols.

R&D			1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25		26
	VLAN 1																									25	26	27	28	Power
																														Console
																														RPS
	Tagged																													Diag
																											27		28
	Ports
		Untagged Ports									Tagged Port
																														VLAN
		VLAN																												aware
	Finance	unaware																												switch
VLAN 2		switch
Testing		Marketing																								R&D
					Finance																									Testing
	VLAN 3

VLAN 4

VLAN 1

VLAN 2 VLAN 3

Figure 2-4 Making VLAN Connections

Note: When connecting to a switch that does not support IEEE 802.1Q VLAN tags, use untagged ports.

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