Class 1 laser product, L/a d/c d/c l/a d/c l/a – Allied Telesis AT-S63 User Manual
Page 548
Chapter 23: Multiple Spanning Tree Protocol
548
Section V: Spanning Tree Protocols
Figure 181 illustrates the same two AT-9400 Series 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 181. 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