VLAN Tagging (IEEE 802.1Q)

VLAN

VLAN Tagging or IEEE 802.1Q is a networking standard allowing multiple bridged networks to transparently share the same physical network link without leakage of information between networks. IEEE 802.1Q — along with its shortened form dot1q — is commonly used to refer to the encapsulation protocol used to implement this mechanism over Ethernet networks.

STENTOFON IP Stations support 802.1Q as from firmware version 01.09.3.0.

User interface:
VLAN is configured in the IP station web interface.

• Select Advanced Configuration -> VLAN from the menu.

Clicking the Apply settings button will apply the chosen settings. With the exception of a restart, the saved settings will not come into effect until Apply settings is clicked.

Enable VLAN:
This option determines whether the switch uses 802.1Q or not. If this is enabled, the switch is VLAN aware. Select YES or NO from the dropdown menu.

Port specific VLAN rules and tagging options:
Here, it is possible to specify which VLAN ID and priority the ports should assign untagged packets to. Tagged packets are not changed.

• VLAN ID has a value range from 0 to 4094. It specifies which VLAN ID tag to add to a packet.
• VLAN priority has a value range from 0 to 7. It specifies which VLAN priority tag to add to a packet.
• Sending filter specifies whether a given port will only send to VLANs which it is a member of or all VLANs. For example, if the chosen option is MEMBERS then a packet with VLAN ID 1 at the LAN port

will only reach another port which is a member of VLAN ID 1. Select MEMBERS or ALL from the dropdown menu.

• Acceptance filter specifies whether a port will accept only tagged packets or all packets. The option ONLY TAGGED should only be used against VLAN aware devices which tag packets. Select ONLY

TAGGED or ALL from the dropdown menu.

• If the IP-station upgrade with VLAN scrolldown box is set to YES the IP station will send tagged packets during the upgrade.

VLAN priority tag to switch priority:
Here, it is possible to specify how the switch should queue the packets with VLAN priority tag.

• Switch priority: Select HIGH or LOW from the dropdown menu. By default, packets with VLAN priority tags from 4 to 7 are set to the HIGH priority queue.

See also IP Station on VLAN with Cisco Catalyst PoE swtich

Add ports to a VLAN:
Here, it is possible to determine whether the ports should be members of the specified VLAN. There is also a setting for specifying whether the ports should strip or keep the VLAN tag when sending egress packets.

• Membership determines whether the port is a member of the specified VLAN or not. Select Not member or Member from the dropdown menu.
• Egress tagging determines whether the port should remove VLAN tags or keep them for the specified VLAN. Select Remove tag or Keep tag from the dropdown menu.

Clicking the Add VLAN button will add the current chosen settings to the VLAN table below. If a VLAN in the VLAN table already exists with the chosen VLAN ID, then the settings will be updated.

Remove VLAN by ID:
Here, it is possible to determine which VLAN is to be removed from the VLAN table by specifying the VLAN ID, then clicking the Remove VLAN button.

VLAN table:
The VLANs that the ports are members of are listed under the Membership Info column. The table also lists the ports that keep the VLAN tag when sending egress packets; this is shown under the Egress Tagging Info column. The VLAN table can accommodate a maximum of 63 VLANs.

The DHCP address is received before the switch is VLAN aware (during startup).
Either trunk all VLANs or set the DHCP server which should reach the IP substation
on a native VLAN.

IEEE 802.1Q, or VLAN Tagging, is a networking standard written by the IEEE 802.1 workgroup allowing multiple bridged networks to transparently share the same physical network link without leakage of information between networks. IEEE 802.1Q — along with its shortened form dot1q — is commonly used to refer to the encapsulation protocol used to implement this mechanism over Ethernet networks.

IP Stations on the INCA platform support 802.1Q as from firmware version 01.09.3.0.

User interface

The VLAN interface can be found in the IP-station web interface at Advanced --> VLAN

• The button “Apply switch settings” will apply the chosen settings. The saved settings are not used until this button is pushed, except in the case of a restart.

• Enable VLAN – Decides whether the switch use 802.1Q or not. If enabled then the switch is VLAN aware.

• In table “Port specific VLAN rules and tagging options” it is possible to decide which VLAN ID and priority the ports should assign untagged packets. Tagged packets are not changed.
  • The setting “VLAN ID” has a value range from 0-4094. It decides which VLAN ID tag to add to a packet.
  • The setting “Priority” has a value range from 0-7. It decides which VLAN priority tag to add to a packet.
  • The setting “Sending filter” decides whether a given port will only send to VLANs which it is a member of or all VLANs. For example if the chosen option is “MEMBERS” then a packet with VLAN ID 2 at the LAN port will only reach another port which is member of VLAN ID 2.
  • The setting “Acceptance filter” decides whether a port will accept only tagged packets or all packets. The option “ONLY TAGGED” should only be used against VLAN aware devices which tag packets.

• In table “VLAN priority tag to switch priority” it is possible to decide how the switch shoule queue the packets with VLAN priority tag. The switch got 2 priority queues: HIGH and LOW. By default packets with VLAN priority tags from 4-7 are in the HIGH priority queue.

• In table "Add ports to a VLAN" it is possible to choose if the ports should be members of the specified VLAN. A setting is also given to choose whether the ports should strip the VLAN tag or keep it when sending egress packets.
  • The setting “Membership” decides whether the port is member of the specified VLAN or not
  • The setting “Egress tagging” decides whether the port should remove VLAN tags or keep them for the specified VLAN.

• The button “Add VLAN” will add the current chosen settings to the “VLAN table”. If a VLAN in the “VLAN table” already exists with the chosen VLAN ID then the settings will be updated.

• In the table "Remove VLAN by ID" it is possible to choose which VLAN that should be removed from the “VLAN table” by specifying the VLAN ID, then clicking the button "Remove VLAN"

• The “VLAN table” lists the VLANs the ports are member of in the “Membership Info” column. The table also lists the ports which keep the VLAN tag when sending egress packets; this is shown in the “Egress Tagging Info” column. The VLAN table can max include 63 VLANs.

Note:

• During upgrading the IP-station switch will not be VLAN aware. Thus make sure the IP-station can reach the tftp server from the native VLAN.
• DHCP address is received before the switch is VLAN aware (during startup). Either trunk all VLANs or set the DHCP server which should reach the IP-station on a native VLAN.

Software requirement

• IP Station software 01.09.3.0 or later.

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