Configuring Transparent Transmission For Vlans; Configuring The Tpid For Vlan Tags - HP FlexFabric 12900 Series Configuration Manual

Configuring transparent transmission for VLANs

You can exclude traffic of a VLAN (for example, the management VLAN) from the QinQ tagging action
on a customer-side port. This VLAN is called a transparent VLAN.
To ensure successful transmission for a transparent VLAN, follow these configuration guidelines:
Set the link type of the port to trunk or hybrid, and assign the port to the VLAN.
•
• Do not configure any other VLAN manipulation actions for the VLAN on the port.
Make sure all ports on the traffic path permit the VLAN to pass through.
•
To configure transparent transmission for a list of VLANs:
Step
1. Enter system view.
2. Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view.
3. Configure the link type.
4. Assign the port to the
transparent VLANs and port
VLAN.
5. Enable QinQ on the port.
6. Enable transparent
transmission for the
transparent VLANs.

Configuring the TPID for VLAN tags

TPID identifies a frame as an 802.1Q tagged frame. On the device, the TPID in the 802.1Q tag added
on a QinQ-enabled port is 0x8100 by default, in compliance with IEEE 802.1Q. However, the TPID value
varies with vendors. In a multi-vendor network, you must make sure the TPID setting is the same across all
devices so 802.1Q tagged frames can be identified correctly.
TPID settings include CVLAN TPID and SVLAN TPID.
A QinQ-enabled port uses the CLAN TPID to match incoming tagged frames. An incoming frame is
handled as an untagged frame if its TPID is different from the CVLAN TPID. The device supports one
CVLAN TPID for all QinQ-enabled ports.
A service provider-side port uses the SVLAN TPID to replace the TPID in outgoing frames' SVLAN tags, in
addition to matching incoming tagged frames. SVLAN TPIDs are configurable on a per-port basis.
For example, the PE device is connected to a customer device that uses the TPID 0x8200 and to a
provider device that uses the TPID 0x9100. To be compatible with these devices, you must set the CVLAN
TPID and SVLAN TPID to 0x8200 and 0x9100 on the PE, respectively. The devices can then correctly
identify tagged frames.
Command
system-view
interface interface-type
interface-number
port link-type { hybrid | trunk }
•
On a hybrid port:
port hybrid vlan vlan-id-list
{ tagged | untagged }
•
On a trunk port:
port trunk permit vlan
{ vlan-id-list | all }
qinq enable
qinq transparent-vlan vlan-list
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Remarks
N/A
N/A
By default, the link type of ports is
access.
By default:
•
A trunk port is only in VLAN 1.
•
A hybrid port is only an
untagged member in VLAN 1.
By default, QinQ is disabled.
By default, transparent
transmission is not configured for
any VLANs on a port.