Multiple Vlans Configuration Example; Figure 6: Sample Network With Multiple Vlans; Table 8: Components Of Sample Network With Multiple Vlans - Juniper EX2500 Configuration Manual

Multiple VLANs Configuration Example

Figure 6 shows a sample network consisting of an EX2500 switch configured with
multiple VLANs with VLAN-tagged gigabit adapters.

Figure 6: Sample Network with Multiple VLANs

Server 1
VLAN 1
The multiple VLANs example in Figure 6 is described in Table 8.
Table 8: Components of Sample Network with Multiple VLANs (1 of 2)
Component Description
EX2500 switch This switch is configured with three VLANs that represent three different IP subnets. Five ports are
connected downstream to servers. Two ports are connected upstream to routing switches.
Uplink ports are members of all three VLANs, with VLAN tagging enabled.
Server 1 This server is a member of VLAN 1 and has presence in only one IP subnet. The associated switch port is
only a member of VLAN 1, so tagging is disabled.
Server 2 This server is a member of VLAN 1 and has presence in only one IP subnet. The associated switch port is
only a member of VLAN 1, so tagging is disabled.
Server 3 This server belongs to VLAN 2, and it is logically in the same IP subnet as Server 5.
The associated switch port has tagging disabled.
Server 4 A member of VLAN 3, this server can communicate only with other servers via a router.
The associated switch port has tagging disabled.
All ports that are involved in port mirroring must have memberships in the
same VLANs. If a port is configured for port mirroring, the port's VLAN
membership cannot be changed. For more information on configuring port
mirroring, see "Monitoring Ports with Port Mirroring" on page 81.
Enterprise
Routing Switch
Server 2 Server 3
VLAN 1 VLAN 2
Enterprise
Routing Switch
EX2500
Switch
Server 4 Server 5
VLAN 3 VLAN 1, 2
VLAN Topologies and Design Considerations
Chapter 2: VLANs
27