Phoenix Contact FL NAT SMN 8TX, Руководство пользователя, Страница: 82 / 102

FL NAT SMN 8TX(-M)
5-16
PHOENIX CONTACT 7966_en_04
– Rule 2: At least one active Spanning Tree component per loop

An active Spanning Tree component supports the Spanning Tree protocol,
sends/receives and evaluates BPDUs, and sets its ports to the relevant STP states.

Each loop in a network must have at least one active Spanning Tree component to
disintegrate the loop.

Example:
Figure 5-11 Example topology
The loops in the example topology illustrated are disabled by active RSTP components. The
example topology contains three rings, the root and the backup root are components in
each of the three rings. The three rings do not affect one another, a modification to the
topology in one ring does not affect the topology of the other two rings.
– Rule 3: No more than ten active Spanning Tree components in the topology
when using Spanning Tree default setting

The ability to disintegrate any topology to form a tree without loops requires a complex
protocol that works with several variable timers. These variable timers are dimensioned
using the default values recommended by the IEEE standard so that a topology with a
maximum of fifteen active Spanning Tree components always results in a stable
network. When using large tree, please note the following (see also Section “Large Tree
Support” on page 5-3):
– In the large tree support RSTP topology, only use devices that support large tree.
– Enable the “Large Tree Support” option on all devices.
– If RSTP is to be activated as the redundancy mechanism in an existing network with
more than seven switches along the relevant path, then the “Large Tree Support” option
must first be enabled on all devices.
– It is recommended that large tree support is not activated in networks with less than
seven switches along the relevant path.
FL SWITCH MCS 16TX
Ord. No. 28 32 70 0
00.A0.45.1B.D2.1D
MAC
Address
1 3 5 7
2 4 6 8
9 11 13 15
10 12 14 16
9 16 10 11 12 13 14 15 1 8 2 3 4 5 6 7
MODE
ACT 100 FD
US1 US2 FAIL
X19
V.24 X17
US1 GND US2 GND
X18
R1 R2
FL SWITCH MCS 16TX
Ord. No. 28 32 70 0
00.A0.45.1B.D2.1D
MAC
Address
1 3 5 7
2 4 6 8
9 11 13 15
10 12 14 16
9 16 10 11 12 13 14 15 1 8 2 3 4 5 6 7
MODE
ACT 100 FD
US1 US2 FAIL
X19
V.24 X17
US1 GND US2 GND
X18
R1 R2
FL SWITCH MCS 16TX
Ord. No. 28 32 70 0
00.A0.45.1B.D2.1D
MAC
Address
1 3 5 7
2 4 6 8
9 11 13 15
10 12 14 16
9 16 10 11 12 13 14 15 1 8 2 3 4 5 6 7
MODE
ACT 100 FD
US1 US2 FAIL
X19
V.24 X17 US1 GND US2 GND X18 R1 R2
FL SWITCH MCS 16TX
Ord. No. 28 32 70 0
00.A0.45.1B.D2.1D
MAC
Address
1 3 5 7
2 4 6 8
9 11 13 15
10 12 14 16
9 16 10 11 12 13 14 15 1 8 2 3 4 5 6 7
MODE
ACT 100 FD
US1 US2 FAIL
X19
V.24 X17
US1 GND US2 GND
X18
R1 R2
Switch 1
Root-Bridge
Priorität: 0
Switch 2
Backup-Root-Bridge
Priorität: 4000
Discarding Port
Switch 3
Priorität: Default
Switch 4
Priorität: 40000
Switch 6
Priorität: Default
Switch 5
Priorität: Default
Switch 7
Priorität: 40000
Switch 8
Priorität: Default
Switch 9
Priorität: Default
Switch 10
Priorität: Default
Switch 12
Priorität: Default
Switch 11
Priorität: 40000
74710018
00.A0.45.06.04.02
MAC
Address
1 2 3 4
LINK
Mode
US2 FAIL
X9
US1 GND US2 GND
X10
R1 R2
FL SWITCH SMSC 8GT
Ord. No. 2891123
US1
X11
MEM
MODE
SPD FD ACT
5 6 7 8
X12
V.24
1 3 5 7
2 4 6 8
00.A0.45.06.04.02
MAC
Address
1 2 3 4
LINK
Mode
US2 FAIL
X9 US1 GND US2 GND X10 R1 R2
FL SWITCH SMSC 8GT
Ord. No. 2891123
US1
X11
MEM
MODE
SPD FD ACT
5 6 7 8
X12
V.24
1 3 5 7
2 4 6 8
00.A0.45.06.04.02
MAC
Address
1 2 3 4
LINK
Mode
US2 FAIL
X9 US1 GND US2 GND X10 R1 R2
FL SWITCH SMSC 8GT
Ord. No. 2891123
US1
X11
MEM
MODE
SPD FD ACT
5 6 7 8
X12
V.24
1 3 5 7
2 4 6 8
00.A0.45.06.04.02
MAC
Address
1 2 3 4
LINK
Mode
US2 FAIL
X9
US1 GND US2 GND
X10
R1 R2
FL SWITCH SMSC 8GT
Ord. No. 2891123
US1
X11
MEM
MODE
SPD FD ACT
5 6 7 8
X12
V.24
1 3 5 7
2 4 6 8