IBM 8275-416, User Manual

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v
Include (registration fixed)
v
Exclude (registration forbidden)
v
Autodetect (normal registration)
When a port is configured to be included in a VLAN, the port is always a member of
the specified VLAN. This is similar to port-based VLANs from other legacy products.
VLAN membership of these ports will propagate across the network if GVRP is
enabled. Ports should be included in a VLAN whenever VLAN membership of a port
is desired to be guaranteed.
A port that is configured to be Autodetected does not initially belong to the given
VLAN. However, the port may join the VLAN if a GVRP PDU is received on that
port declaring membership in that VLAN. Ports may be left in Autodetect mode if
the devices on the segment connected to the port all support GVRP and thus will
register their VLANs with the port.
A port that is configured to be excluded is prevented from being a part of the
specified VLAN. You can disable GVRP on a specific port or set of ports to ensure
that they never join a VLAN by receiving and propagating GVRP PDUs.
Configuration examples
The following section will discuss some common network configuration scenarios
and how the switch should be configured to ensure proper operation.
Untagged device to untagged device
This configuration consists of two untagged “legacy” devices connected to the
switch. In order for these devices to communicate, they must be members of the
same VLAN. In this case, the PVID of the ports that the devices are connected to
must be set to the VLAN that the devices are members of. In order to set the ports
PVID, a VLAN must first be created with this VLAN ID. Additionally, both ports must
be configured to untag frames for this VLAN.
After this configuration is complete, the frames from Station A will arrive at Port 1
untagged, and will then be tagged internally to the switch with the PVID (VLAN 5).
Station A
Untagged
Station B
Untagged
Static VLAN 5:
Ports 1, 12 fixed
Port 1:
PVID = 5
Port 12:
PVID = 5
100 /10 Mbps LINK /TxRx
EIA-232
19200 8 N 1
l
OK
Fault
1X
1 2
9X 2X 10X 3X 11X 4X 12X 5X 13X 7X 15X 6X 14X 8X 16X
Figure 76. Untagged device to untagged device configuration
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8275-416 User’s Guide