17 — I-040G-A unit data sheet
Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06 July 2008 17-7
3FE 51892 AAAA TCZZA Edition 01 ONT Product Information Manual
When using VLAN translation, the use the following configuration rules:
• Only a single UNI/NW C-VLAN pair is allowed per service.
• Overlapping P-bits can be used for difference services on UNI. However, in
VLAN pass-tru mode, the same P-bits as other services cannot be used on the
UNI. Overlapping P-bits are allowed only for non-default services.
Table 17-7 describes upstream VLAN tagging and P-bit allocation in VLAN
translation mode.
Table 17-7 Upstream VLAN translation mode
Table 17-8 describes downstream VLAN tagging behavior for VLAN translation.
Table 17-8 DownstreamVLAN translation behavior
Ethertype classification and Ethertype with VLAN translation
Ethertype classification is used to classify traffic in the upstream direction based on
the Ethernet type (IPoE or PPPoE). Ethertype classification operates as normal
except that the received C-VLAN must match the default C-VLAN configured at the
ONT or the packet is dropped.
Ethertype classification may also be used in conjunction with VLAN translation. All
the considerations described in the VLAN translation section apply with the
additional that the received C-VLAN and Ethertype must match the default NW
C-VLAN an Ethertype or the packet is dropped.
See the 7342 ISAM FTTU Product Information Manual for more information on
Ethertype classification.
Traffic mode Traffic type Ethernet switch behavior
VLAN translation Untagged packets Default C-VLAN and P-bits are added to the packets.If the
packets are IP, the DSCP to P-bits mapping is used. If the
packets are PPPoE, the default P-bits are used. The C-VLAN
and derived P-bits are now considered the UNI side C-VLAN.
Received UNI C-VLAN and P-bits must match NW C-VLAN
configure P-bits or the packet is dropped.
P-bit and C-VLAN tagged
packets
Received UNI C-VLAN and P-bits must match NW C-VLAN
configure P-bits or the packet is dropped.
Traffic mode Traffic type GPON behavior Ethernet switch behavior
VLAN translation Tagged packets Only accepts VLAN tagged
traffic that matches the
network VLAN ID configured
using the ENT-SERVICE-HSI
TL1 command. All non
matching VLAN IDs are
dropped.
Only one service is allowed
per VLAN.
The Ethernet switch converts
the network VLAN ID to the
user side VLAN ID and
forwards the packet to the
appropriate port.
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