User's Manual

Table Of Contents
Technical Description & Configuration Guide Detailed Configuration in Web
LigoWave Page 52
Switch 3
Switch 1
CPU 1
Switch 2
CPU 2
CFIP1 CFIP2
User data
MM data
User data
Port 1 Port 2
Port 3
Port 3 Port 3
Port 1
Port 1
Port 2
Port 2
VLAN A&B
VLAN A&B
VLAN A&B
VLAN A&B
VLAN A
VLAN B
VLAN B
VLAN B
VLAN A
Figure 33 - Configuration with management access from one side of the link
For Switch 1:
VLAN A is the Trunk type VLAN with ports 1 & 2 membership
VLAN B is the Management type VLAN with ports 1 & 2 & 3 membership when removing VLAN tags
while packet is being sent to port and inserting tag while packet is transmitting to ports 2 & 1.
For Switch 2:
VLAN A is the Access type VLAN with ports 1 & 2 membership with removing and inserting VLAN tags
while packet is being transmitted to ports 1 and 2, respectively.
VLAN B is the Management type VLAN with ports 2 & 3 membership with removing and inserting
VLAN tags while packet is being transmitted to ports 3 and 2, respectively.
Limitations and rules on using VLAN:
Supports up to 16 full range VLAN IDs. If hardware VLAN table is full, software responds with the
error message: 
Only one VLAN with unique IDs is allowed. When adding a different VLAN with the same IDs, the
old VLAN is deleted (also the other types of VLANs).
Simultaneous use of Access and Trunk type VLANs in the one switch is not allowed.
After the VLAN table initialization is completed, 802.1Q VLAN mode must be enabled by using the
Ethernet VLAN enable
Access VLAN
type, access to the management CPU from LAN port is blocked!
Steps required for VLAN configuration:
1) Configure switches for VLAN tag encapsulation on both ends of the link;
LigoPTP 24 FODU
Web management;
VLAN tagging already must be configured on the switch and known to you; otherwise,
incorrect VLAN configuration may disable access to management port.
3) Set LigoPTP 24 FODU Web
management.