17 — I-040G-A unit data sheet
17-6 July 2008 Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06
ONT Product Information Manual Edition 01 3FE 51892 AAAA TCZZA
Table 17-5 Upstream untrusted and trusted tagging behavior
Downstream traffic handling (strip tag and tag through)
Table 17-6 describes downstream VLAN tagging behavior for strip tag and tag
through modes.
Table 17-6 Downstream untrusted and trusted tagging behavior
VLAN translation traffic handling
VLAN translation is a feature that allows that ONT to translate a C-VLAN into
another C-VLAN. A network (NW) C-VLAN is used when data is sent over the
GPON network, and a user network interface (UNI) side C-VLAN is used when data
is sent to customer equipment.
Traffic source Traffic type Ethernet switch behavior
Untrusted Untagged packets Default C-VLAN and P-bits are added to the packets.
P-bit tagged packets Default C-VLAN is added to the packets. P-bits are
overwritten.
P-bit and C-VLAN tagged
packets
Received C-VLAN and P-bits are overwritten.
Trusted 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.
P-bit tagged packets Received P-bits are overwritten with default C-VLAN. P-bits
are unchanged.
P-bit and C-VLAN tagged
packets
Received C-VLAN must match default VLAN or the packet is
dropped. P-bits are unchanged.
Traffic mode Traffic type Transmitted to ONT port as
Strip tag Untagged packets Untagged packet.
P-bit tagged packets Untagged packet.
C-VLAN tagged packets Untagged packet.
Tag through Untagged packets Untagged packet.
P-bit tagged packets Default C-VLAN is added and the
maximum number of P-bits will be
accepted.
C-VLAN tagged packets Default C-VLAN overwrites the received
C-VLAN and the maximum number of
P-bits will be accepted.
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