2.5.2 - Force10 Networks

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Force10 #show interface ethernet 1/0/1
Type................. Normal
Admin Mode........... Disable
Physical Mode........ Auto
Physical Status...... Down
Speed................ 0 - None
Duplex............... N/A
Link Status.......... Down
MAC Address.......... 0001.E8D5.A0DA
Native Vlan………………………… 1
Total Packets Received (Octets)................ 512
Packets Received > 1522 Octets................. 0
Packets RX and TX 64 Octets.................... 8
Packets RX and TX 65-127 Octets................ 0
Packets RX and TX 128-255 Octets............... 0
!--output truncated--!
Figure 191 Using show interface ethernet Command to Display Native VLAN Membership and Activity
Configuring a VLAN Tunnel (DVLAN or VLAN-Stack)
Note: VLAN stacking functionality existed in SFTOS prior to SFTOS 2.5.2.0, but it was not
tested in SFTOS 2.5.2.0, so it is not supported.
VLAN stacking, also called Double VLAN (DVLAN) and QinQ, support VLAN tunneling. In more detail,
with the VLAN-Stack feature, you can “stack” VLANs into one tunnel and switch them through the
network. This feature is a way to pass VLAN traffic from one customer domain to another through a metro
core in a simple, cost-effective manner.
The additional tag on the traffic helps differentiate between customers in the MAN while preserving the
VLAN identification of the individual customers when the traffic enters their own 802.1Q domains. The
4-byte tag precedes the VLAN tag and carries:
• Protocol ID (Ethertype field)
• Customer ID (VLAN ID field)
DVLAN Tagging Considerations
• Frame size: If the port is enabled for DVLAN tagging and maximum length frames are expected,
jumbo frame support should also be enabled (Use the mtu command in Interface Config mode).
• Port types: DVLAN tagging may be enabled for a LAG, but not for LAG members, VLAN routing
ports, or probe ports.
• Control frames: Control frames (e.g. GARP, LACPDUs) will be double-tagged.
• Ethertypes for DVLAN tags (“DVLAN tag” is sometimes shortened to DVT):
• 802.1Q tag (0x8100)
• vMAN tag (0x88A8)
238 VLANs