Mstp Configuration With Ufo Vlan - Allied Telesis SwitchBlade x3100 Series Manual

Introduction

4.7.5 MSTP Configuration with UFO VLAN

Figure 4-21 shows an example configuration that uses MSTP with UFO VLANs.
Parameters can be set so that each MSTI has a Regional Root Bridge on separate systems. On each of these
systems, the VLANs on the upstream port are set to PRIMARYUPSTREAM and the other ports are set to
DOWNSTREAM. All other ports are other systems are set to STP.
In this example, each MST Instance has only one VLAN and its upstream interface is configured as
Note:
PRIMARYUPSTREAM. If there are multiple VLANs for an MST Instance, each VLAN should be set as
PRIMARYUPSTREAM over the same upstream port.
For Root Bridge A,
UFO VLANS set as
0.1 = DOWNSTREAM
0.2 = DOWNSTREAM
0.3 = PRIMARYUPSTREAM
For other devices, UFO VLAN
on the interface set to STP
for dynamic state change
0.2
V_80
0.1
4-170
Software Reference for SwitchBlade x3100 Series Switches (Layer Two Switching)
To / From Network
1
Regional Root Bridge MST2
V_60
V_60
V_80
2
V_60
Ring Topology Using MSTP and UFO VLAN
FIGURE 4-21
MSTP Configuration with UFO VLAN
0.3
V_80
A
V_60
MST1 Instance
MST2 Instance
= UFO VLAN 60
= UFO VLAN 80
D = Devices
A
1 = Links
4
C
V_80
= Physical Link
= Blocking of VLAN traffic
4
0.1
Regional
Root Bridge
MST1
V_80
V_60
0.2
For Root Bridge D,
UFO VLANS set as
3
0.1 = DOWNSTREAM
0.2 = DOWNSTREAM
0.3 = PRIMARYUPSTREAM
For other devices, UFO VLAN
on the interface set to STP
for dynamic state change
To / From
Network