Digisol DG-GS4826S Management Manual page 192

C 6 | VLAN Configuration
HAPTER
IEEE 802.1Q Tunneling
Configuration Limitations for QinQ
The native VLAN of uplink ports should not be used as the SPVLAN. If
u
the SPVLAN is the uplink port's native VLAN, the uplink port must be an
untagged member of the SPVLAN. Then the outer SPVLAN tag will be
stripped when the packets are sent out. Another reason is that it
causes non-customer packets to be forwarded to the SPVLAN.
Static trunk port groups are compatible with QinQ tunnel ports as long
u
as the QinQ configuration is consistent within a trunk port group.
The native VLAN (VLAN 1) is not normally added to transmitted frames.
u
Avoid using VLAN 1 as an SPVLAN tag for customer traffic to reduce the
risk of misconfiguration. Instead, use VLAN 1 as a management VLAN
instead of a data VLAN in the service provider network.
There are some inherent incompatibilities between Layer 2 and Layer 3
u
switching:
Tunnel ports do not support IP Access Control Lists.
n
Layer 3 Quality of Service (QoS) and other QoS features containing
n
Layer 3 information are not supported on tunnel ports.
Spanning tree bridge protocol data unit (BPDU) filtering is
n
automatically disabled on a tunnel port.
General Configuration Guidelines for QinQ
1. Enable Tunnel Status, and set the Tag Protocol Identifier (TPID) value of
the tunnel access port (in the Ethernet Type field. This step is required
if the attached client is using a nonstandard 2-byte ethertype to
identify 802.1Q tagged frames. The default ethertype value is 0x8100.
(See "Enabling QinQ Tunneling on the Switch" on page
2.
Create a Service Provider VLAN, also referred to as an SPVLAN (see
"Configuring VLAN Groups" on page
3. Configure the QinQ tunnel access port to Tunnel mode (see
Interface to a QinQ Tunnel" on page
4.
Configure the QinQ tunnel access port to join the SPVLAN as an
untagged member (see
page 176).
5.
Configure the SPVLAN ID as the native VID on the QinQ tunnel access
port (see "Adding Static Members to VLANs" on page
6. Configure the QinQ tunnel uplink port to Tunnel Uplink mode (see
"Adding an Interface to a QinQ Tunnel" on page
7. Configure the QinQ tunnel uplink port to join the SPVLAN as a tagged
member (see "Adding Static Members to VLANs" on page
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174).
194).
"Adding Static Members to VLANs" on
193.)
"Adding an
176).
194).
176).