User manual
(Rapid) Spanning Tree
6874_en_09 PHOENIX CONTACT 5-11
When using RSTP fast ring detection, please note the following:
– For RSTP fast ring detection, do not use devices that do not support this function.
– Enable RSTP fast ring detection on all devices.
– All data paths must be in full duplex mode.
5.2.2 Connection Failure - Example
The following diagram illustrates an RSTP ring with six switches, where switch 1 is the root.
The ring extends over port 1 and port 2 for each switch. On switch 4, the loop is broken by
a blocking port.
If a cable interrupt occurs at the point indicated by the star, this produces the following
entries on the "RSTP Fast Ring Detection" web page:
Switch 3 - Failed on Port A
Switch 4 - Broken
Switch 3 would also generate the "flWorkLinkFailure" trap, as long as the sending of traps
is not disabled.
Figure 5-10 Connection failure with RSTP ring detection
If "Breaked" or "Failed" status lasts for longer than 60 seconds, it is no longer displayed
after the next topology modification, since these rings no longer exist.
FL SWITCH MCS 16TX
Ord. No.28 32 70 0
00.A0.45.1B.D2.1D
MAC
Address
1357
2468
9
11
13
15
10
12
14
16
91610 11 12 13 14 15
18234567
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
1357
2468
9
11
13
15
10
12
14
16
91610 11 12 13 14 15
18234567
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
1357
2468
9
11
13
15
10
12
14
16
91610 11 12 13 14 15
18234567
MODE
ACT
100
FD
US1 US2
FAIL
X19
V.24
X17
US1 GND US2 GND
X18
R1 R2
LNK
MODE
1
2
X1
LNK
MODE
1
2
X2
LNK
MODE
1
2
X3
LNK
MODE
1
2
X4
US1
US2
Fail
Reset
MODE
ACT
100
FD
FL SWITCH MM HS
Ord. No. 28 32 32 6
US2US1
GND GND
R1 R2
00A0451BDD
MAC
Address
V.2 4
LNK
MODE
1
2
X1
LNK
MODE
1
2
X2
LNK
MODE
1
2
X3
LNK
MODE
1
2
X4
US1
US2
Fail
Reset
MODE
ACT
100
FD
FL SWITCH MM HS
Ord. No. 28 32 32 6
US2US1
GND GND
R1 R2
00A0451BDD
MAC
Address
V.24
LNK
MODE
1
2
X1
LNK
MODE
1
2
X2
LNK
MODE
1
2
X3
LNK
MODE
1
2
X4
US1
US2
Fail
Reset
MODE
ACT
100
FD
FL SWITCH MM HS
Ord. No. 28 32 32 6
US2US1
GND GND
R1 R2
00A0451BDD
MAC
Address
V.24
Root
687407052
2
2
2
2
2
2
1
1
1
1
1
1
2
3
4
5
6