Figure 4-33 Signal Flow Of And Timeslot Allocation To Evplan Services (Ieee 802.1Q Bridge) - Huawei OptiX OSN 550 Configuration Manual

4 Configuring Ethernet Services
In this example, the convergence node NE1 is configured with an EFS8 board that supports the
IEEE 802.1q bridge to implement EVPLAN services in which user data is isolated.
The access nodes NE2 and NE4 each are configured with two Ethernet transparent transmission
boards respectively, which occupy logical slots 3 and 4. The EPL services are configured to
implement transparent transmission from NE2 and NE4 to NE1.
4.9.2 Signal Flow and Timeslot Allocation
The Ethernet services of the convergence node are received from an external port and tagged
with the corresponding VLAN IDs. After the services are forwarded to an internal port through
Layer 2 switching, the VLAN IDs are stripped and then the services are transparently transmitted
in the SDH network. In this way, the node communicates with a remote node.
Figure 4-33
timeslot allocation to the EVPLAN services (IEEE 802.1q bridge).
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 4-33 Signal flow of and timeslot allocation to EVPLAN services (IEEE 802.1q bridge)

User G1
User H1
Strip VLAN Label
l
4-98
shows the signal flow of the EVPLAN services (IEEE 802.1q bridge) and the
NE1:EFS8
VLAN 100
VCTRUNK1
PORT1
VC4-4:VC12:1-5
VCTRUNK2
VC4-4:VC12:6-10
VLAN 200
VCTRUNK3
PORT2
VC4-4:VC12:11-20
VCTRUNK4
VC4-4:VC12:21-30
VB1
PORT
Add VLAN Label
Data(User G) VLAN(100) Data(User G)
Data(User H) VLAN(200) Data(User H)
The Ethernet LAN services of user G:
– Occupy the first to fifth VC-12 timeslots of the first VC-4 (VC4-1:VC12:1-5) on the
SDH link from NE1 to NE2 and the first to fifth VC-12 timeslots of the first VC-4
(VC4-1:VC12:1-5) on the SDH link from NE1 to NE4.
– Are added and dropped by using the first to fifth VC-12 timeslots of the fourth VC-4
(VC4-4:VC12:1-5) on the EFS8 board of NE1 and the first to fifth VC-12 timeslots of
the fourth VC-4 (VC4-4:VC12:1-5) on the 3-EGT1 board of NE2.
– Are added and dropped by using the sixth to tenth VC-12 timeslots of the fourth VC-4
(VC4-4:VC12:6-10) on the EFS8 board of NE1 and the first to fifth VC-12 timeslots
of the fourth VC-4 (VC4-4:VC12:1-5) on the 3-EGT1 board of NE4.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
OptiX OSN 550 Multi-Service CPE Optical Transmission
VCTRUNK1
VC4-4:VC12:1-5
VCTRUNK1
VC4-4:VC12:1-10
VCTRUNK1
VC4-4:VC12:1-5
VCTRUNK1
VC4-4:VC12:1-10
SDH
VCTRUNK
Strip VLAN Label
Data(User G)
Data(User H)
System
Configuration Guide
Boards.
NE2
3-EGT1
PORT1
User G2
PORT1
User H2
4-EGT1
NE4
3-EGT1
PORT1
User G3
PORT1
User H3
4-EGT1
Issue 02 (2011-06-30)