Class 1 laser product, L/a d/c d/c l/a d/c l/a – Allied Telesis AT-S63 User Manual
Page 236
Chapter 22: Multiple Spanning Tree Protocol
236
Section V: Spanning Tree Protocols
Figure 24 illustrates the same two AT-9400 Switches and the same two
virtual LANs. But in this example, the two switches are running MSTP and
the two VLANs have been assigned different spanning tree instances.
Now that they reside in different MSTIs, both links remain active, enabling
the VLANs to forward traffic over their respective direct link.
Figure 24. MSTP Example of Two Spanning Tree Instances
FAULT
RPS
MASTER
POWER
CLASS 1
LASER PRODUCT
STATUS
TERMINAL
PORT
1
3
5
7
9
11
2
4
6
8
10
12
13
15
17
19
21
23R
14
16
18
20
22
24R
AT-9424T/SP
Gigabit Ethernet Switch
1
3
5
7
9
11
13
15
17
19
21
23R
2
4
6
8
10
12
14
16
18
20
22
24R
23
24
L/A
D/C
D/C
L/A
D/C
L/A
1000 LINK / ACT
HDX / COL
FDX
10/100 LINK / ACT
PORT ACTIVITY
L/A
1000 LINK / ACT
SFP
SFP
24
SFP
23
FAULT
RPS
MASTER
POWER
GBIC
23
GBIC
24
CLASS 1
LASER PRODUCT
STATUS
TERMINAL
PORT
1
3
5
7
9
11
2
4
6
8
10
12
13
15
17
19
21
23R
14
16
18
20
22
24R
AT-9424T/GB
Gigabit Ethernet Switch
1
3
5
7
9
11
13
15
17
19
21
23R
2
4
6
8
10
12
14
16
18
20
22
24R
23
24
L/A
D/C
D/C
L/A
D/C
L/A
1000 LINK / ACT
HDX / COL
FDX
10/100 LINK / ACT
PORT ACTIVITY
L/A
1000 LINK / ACT
GBIC
Sales
VLAN in
MSTI 1
Production
VLAN in
MSTI 2
Untagged
Ports
Untagged
Ports