3Com 4007 Implementation Manual page 296

296 C 14: V
HAPTER IRTUAL
Receive port is
untagged in a
VLAN that
No
matches the
frame's protocol
type?
Assign
frame to
null VLAN
LAN (VLAN )
S S
Figure 23 shows the flow chart for the Release 3.0 VLAN ingress rules for
Multilayer Switching Modules.
Figure 23 Flow Chart for Release 3.0 Ingress Rules
Incoming Frame
No
Frame tagged?
Yes
No
Assign Assign
frame to frame to
matched null VLAN
VLAN
Yes (frame tagged with a VID)
No
VLAN
mode is
allOpen?
Yes
A VLAN is
defined that
No
matches both
the frame's VID
and protocol
type?
To Egress rules (frame has been assigned to one specific
VLAN)
Receive port is in a
VLAN that
matches both the
frame's VID and
protocol type?
Yes
Assign
frame to
matched
VLAN
Yes