Huawei Quidway S9300 Configuration Manual page 260

Quidway S9300 Terabit Routing Switch
Configuration Guide - Device Management
the wireless bearer network and wireless access network. By default, S9300s encapsulate 1588v2
packets in multicast MAC mode. For NodeBs supporting multicast MAC-encapsulated 1588v2
packets, you can configure all clocks of an entire network as BCs to simplify the operation of
clock synchronization on the entire network.
Networking Requirements
As shown in
are edge devices on a wireless access network. PE1 and PE2, functioning as the external BITS
clock sources for BCs, advertise clock and time information to CE1 and CE2. CE1 and CE2,
functioning as BCs, synchronize clock signals with the BITS through 1588v2 and send 1588v2
packets carrying the frequency and time information to their attached NodeBs. In addition, CE2
can send E1 signals carrying frequency information to non-1588v2-aware NodeB 2 for restoring
frequency synchronization.
Figure 12-10 Networking diagram of clock synchronization on a network through multicast
MAC-encapsulated 1588v2 packets
NodeB1
with 1588v2
Configuration Roadmap
The configuration roadmap is as follows:
1.
2.
Data Preparation
To complete the configuration, you need the following data:
l
l
Issue 03 (2011-12-29)
Figure 12-10, PE1 and PE2 are core devices on a bearer network and CE1 and CE2
GE1/0/1 GE1/0/1
GE1/0/0
CE1
Connect PE1 and PE2 to BITS clock sources.
Configure PE1, PE2, CE1, and CE2 as BCs.
NOTE
1588v2 packets are encapsulated in the default multicast MAC mode.
1588 link delay measurement mechanism: Delay
MAC address of each NodeB
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BITS BITS
GE1/0/0
GE1/0/0 GE1/0/1
PE1 PE2
12 PTP Configuration
NodeB2
without 1588v2
E1
GE1/0/0
GE1/0/1
CE2
NodeB3
with 1588v2
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