Specifications

8-18 Rapier Switch Software Reference
Software Release 2.7.3
C613-03098-00 REV A
Figure 8-2: VLANs with tagged ports
VLAN Membership of Untagged Packets
A VLAN that does not send VLAN-tagged frames is a logical grouping of
ports. All untagged traffic arriving at those ports belongs to that VLAN.
VLANs based on untagged ports are limited because each port can belong only
to one VLAN as an untagged port. Limitations include:
• It is difficult to share network resources, such as servers and printers,
across several VLANs. The routing functions in the switch must be
configured to interconnect using untagged ports only.
• A VLAN that spans several switches requires a port on each switch for
the interconnection of the various parts of the VLAN. When there are
several VLANs in the switch that span more than one switch, then
many ports are occupied with connecting the VLANs, and so are
unavailable for other devices.
Table 8-4: VLAN membership of example of a network using tagged ports
VLAN Member ports
Training 3, 26 on Switch A
21, 22, 25 on Switch B
Marketing 2, 4, 26 on Switch A
23, 25 on Switch B
Admin 1, 2 on Switch A
Port 3
Training VLAN VID=3
411
SWITCH3
Marketing VLAN VID=4Admin VLAN VID=2
Switch A
Switch B
VLAN-aware
server
Port 4Port 1
Port 2
Port 26
Port 25
Port 22
Port 21
Port 23