Install guide

Rapier Layer 3 Gigabit Switch Software Release 2.1.0 33
Rapier Switch Software Release 2.1.0
C613-10200-01 Rev A
The Ingress Rules
When a frame first arrives at a port, the Ingress Rules for the port check the
VLAN tagging in the frame to determine whether it will be discarded or
forwarded to the Learning Process.
The first check depends on whether the Acceptable Frames parameter is set to
Admit All Frames or to Admit Only VLAN Tagged Frames. If it is set to Admit
Only VLAN Tagged Frames, then any incoming frames with a null VLAN
Identifier (VID) are discarded. If a port is tagged for every VLAN it belongs to,
then it is automatically set to Admit Only VLAN Tagged Frames. Frames with
a null VID are VLAN-untagged frames, or frames with priority tagging only.
The switch requires a VLAN Identifier (VID) for every frame it switches. If all
frames are admitted by the Acceptable Frames parameter, the second part of
the Ingress Rules associates with each untagged frame admitted the VID of the
VLAN for which the port is untagged.
Every port belongs to one or more VLANs, and now every incoming frame has
a VID to show which VLAN it belongs to. The final part of the Ingress Rules
depends on whether Ingress Filtering is enabled for the port. If Ingress Filtering
is disabled, all frames are passed on to the Learning Process, regardless of
which VLAN they belong to. If Ingress Filtering is enabled, frames are
admitted only if they have the VID of a VLAN to which the port belongs. If
they have the VID of a VLAN to which the port does not belong, they are
discarded.
The default settings for the switch are for all ports to be untagged members of
the default VLAN, and for the Ingress Rules are to Admit All Frames on ports
that are untagged for one VLAN. Ingress Filtering is OFF by default. This
means that if no VLAN configuration has been done, all incoming frames pass
on to the Learning Process, regardless of whether or not they are VLAN
tagged. If a port is tagged for every VLAN to which it belongs, only VLAN
tagged frames are admitted, and this setting cannot be changed. The
parameters for each port’s Ingress Rules can be configured using the
command:
SET SWITCH PORT=port-list [ACCEPTABLE={VLAN|ALL}]
[INFILTERING={ON|OFF}] [other-parameters...]
The ACCEPTABLE parameter sets the Acceptable Frames Type parameter, in
the Ingress Rules, which controls reception of VLAN-tagged and VLAN-
untagged frames on the port. If ALL is specified, then the Acceptable Frames
Type parameter is set to Admit All Frames. If VLAN is specified, the parameter
is set to Admit Only VLAN-tagged Frames, and any frame received that carries
a null VLAN Identifier (VID) is discarded by the ingress rules. Untagged
frames and priority-tagged frames carry a null VID. VLAN-untagged frames
admitted according to the ACCEPTABLE parameter have associated with them
the VID of the VLAN for which they are an untagged port. The ACCEPTABLE
parameter can only be set if the port is untagged for one VLAN. In this case, the
default is ALL, admitting all tagged and untagged frames. If the port is tagged
for all the VLANs to which it belongs, the ACCEPTABLE parameter is
automatically set to VLAN, and cannot be changed to admit untagged frames.
The INFILTERING parameter enables or disables Ingress Filtering on the
specified ports of frames admitted according to the ACCEPTABLE parameter.
Each port on the switch belongs to one or more VLANs. If INFILTERING is set
to ON, Ingress Filtering is enabled: any frame received on a specified port is
only admitted if the port belongs to the VLAN with which the frame is
associated. Conversely, any frame received on the port is discarded if the port
does not belong to the VLAN with which the frame is associated. VLAN-