Figure 4-27 Signal Flow And Timeslot Allocation - Huawei OptiX OSN 550 Configuration Manual

OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
board. The EPL services are configured to implement service transparent transmission from NE2
and NE4 to NE1.
In this example, NE1 is configured with an EFS8 board. NE2 and NE4 are each configured with
an EGT1 board.
4.6.2 Signal Flow and Timeslot Allocation
Ethernet services wherein different VLAN IDs are used to isolate the data of different users are
received from the same external port of NE1, encapsulated through an internal port, and
transparently transmitted on the SDH network. In this way, the node communicates with a remote
node.
Figure 4-27
allocation to the PORT-shared EVPL (VLAN) services .
For the method of calculating the bandwidth of the Ethernet services carried by a VCTRUNK,
see 6.3 Ethernet Service Bandwidths Carried by VCTRUNKs of Ethernet

Figure 4-27 Signal flow and timeslot allocation

User C1
l
l
Issue 02 (2011-06-30)
shows the signal flow of the PORT-shared EVPL (VLAN) services and the timeslot
NE1:EFS8
VCTRUNK1
EVPL1
PORT1
VC4-4:VC12:1-10
VCTRUNK2
EVPL2
VC4-4:VC12:11-20
The EVPL service from C1 to C2:
– Occupies the first to tenth VC-12 timeslots of the first VC-4 (VC4-1:VC12:1-10) on
the SDH link from NE1 to NE2.
– Is added and dropped by using the first to tenth VC-12 timeslots of the fourth VC-4
(VC4-4:VC12:1-10) on the EFS8 board of NE1 and the first to tenth VC-12 timeslots
of the fourth VC-4 (VC4-4:VC12:1-10) on the EGT1 board of NE2.
The EVPL service from C1 to C3:
– Occupies the first to tenth VC-12 timeslots of the first VC-4 (VC4-1:VC12:1-10) on
the SDH link from NE1 to NE4.
– Is added and dropped by the using the eleventh to twentieth VC-12 timeslots of the
fourth VC-4 (VC4-4:VC12:11-20) on the EFS8 board of NE1 and the first to tenth
VC-12 timeslots of the fourth VC-4 (VC4-4:VC12:1-10) on the EGT1 board of NE4.
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4 Configuring Ethernet Services
VCTRUNK1
VC4-4:VC12:1-10
VCTRUNK1
VC4-4:VC12:1-10
SDH
Boards.
NE2:EGT1
PORT1
EPL
User C2
NE4:EGT1
PORT1
EPL
User C3
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