22 — I-241G-A and I-240G-A unit data sheet
22-6 July 2008 Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06
ONT Product Information Manual Edition 01 3FE 51892 AAAA TCZZA
Table 22-4 Default DSCP to P-bit mapping
Note
(1)
Where x is a number from 0 to 7.
All VLAN tagging behavior operates as described in the 7342 ISAM FTTU Product
Information Manual except as indicated in the following sections.
Upstream traffic handling (trusted and untrusted)
Table 22-5 describes upstream VLAN tagging and P-bit allocation from trusted and
untrusted traffic.
Table 22-5 Upstream untrusted and trusted tagging behavior
Downstream traffic handling (strip tag and tag through)
Table 22-6 describes downstream VLAN tagging behavior for strip tag and tag
through modes.
DSCP P-bit
(1)
0 to 7 x
8 to 15 x
16 to 23 x
24 to 32 x
33 to 40 x
41 to 47 x
48 to 55 x
56 to 63 x
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.
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