SMC Networks SMC6826MPE manual Making Vlan Connections

NETWORK PLANNING

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 the VLANs assigned to the inter-switch links.

The switch also supports multiple spanning trees which allow VLANs 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.

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
		1											11	13											23
	VLAN 1																								25	26
		Console
	Tagged	2											12	14											24
	Ports
		Untagged Ports																	Tagged Port

VLAN 2 Testing

VLAN

Financeunaware switch

Marketing

Finance

VLAN 3

VLAN 4

VLAN 3

VLAN aware switch

R&D

Testing

VLAN 1

VLAN 2

Note:

Figure 2-4 Making VLAN Connections

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

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