Install guide

32 Release Note
Rapier Switch Software Release 2.1.0
C613-10200-01 Rev A
Figure 13: Example output from the SHOW VLAN DEBUG command
Summary of VLAN tagging rules
When designing a VLAN and adding ports to VLANs, the following rules
apply.
1. A port must belong to at least one VLAN.
2. A port can be untagged for zero or one VLAN. A port that is untagged for
a VLAN transmits frames destined for that VLAN without a VLAN tag in
the Ethernet frame.
3. A port can be tagged for zero or more VLANs. A port that is tagged for a
VLAN transmits frames destined for that VLAN with a VLAN tag,
including the VID of the VLAN.
4. A port cannot be untagged and tagged for the same VLAN.
The Switching Process
The switching process comprises related but separate processes. The Ingress
Rules admit or discard frames based on their VLAN tagging. The Learning
Process learns the MAC addresses and VLAN membership of frames admitted
on each port. The Forwarding Process determines which ports the frames are
forwarded to, and the Quality of Service priority with which they are
transmitted. Finally, the Egress Rules determine for each frame whether VLAN
tags are included in the Ethernet frames that are transmitted. These processes
assume that each station on the extended LAN has a unique data link layer
address, and that all data link layer frames have a header which includes the
source MAC address and destination MAC address.
Vlan Enabled Debug Modes Output Timeout
------------------------------------------------------------
Vlan1 PKT 16 60
------------------------------------------------------------
Vlan Enabled Debug Modes Output Timeout
------------------------------------------------------------
Vlan4094 None
------------------------------------------------------------
Table 9: Parameters in the output of the SHOW VLAN DEBUG command
Parameter Meaning
VLAN The VLAN Identifier of the VLAN, shown after the constant
“VLAN”.
Enabled Debug Modes The debugging option for the VLAN; one of “PKT” or “NONE”.
Output The output device for the VLAN.
Timeout The value of the timeout in seconds.