
show spantree nonforwardingreason
9-54
Spanning Tree Configuration
show spantree nonforwardingreason
Use
this
command
to
display
the
reason
for
placing
a
port
in
a
non
‐
forwarding
state
due
to
an
exceptional
condition.
Syntax
show spantree nonforwardingreason
port-string
[
sid
sid
]
Parameters
Defaults
If
no
port
‐
string
is
specified,
non
‐
forwarding
reason
is
displayed
for
all
ports.
If
no
SID
is
specified,
SID
0
is
assumed.
Mode
Switch
command,
read
‐
only.
Usage
Exceptional
conditions
causing
a
port
to
be
placed
in
listening
or
blocking
state
include
a
Loop
Protect
event,
receipt
of
disputed
BPDUs,
and
loopback
detection.
Example
This
example
shows
how
to
display
the
non
‐
forwarding
reason
on
ge.1.1:
C3(rw)->show spantree nonforwardingreason port
ge.
1.1
The non-forwarding reason for port
ge.
1.1 on SID 0 is None
port
‐
string
Specifies
port(s)
for
which
to
display
the
non
‐
forwarding
reason.
sid
sid
(Optional)
Specifies
the
specific
Spanning
Tree(s)
for
which
to
display
the
non
‐
forwarding
reason.
Valid
values
are
0
‐
4094
.
If
not
specified,
SID
0
is
assumed.
Summary of Contents for SECURESTACK C3
Page 2: ......
Page 34: ...xxxii...
Page 40: ...Getting Help xxxviii About This Guide...
Page 126: ...clear license 4 6 Activating Licensed Features...
Page 132: ...set port inlinepower 5 6 Configuring System Power and PoE...
Page 228: ...clear port protected name 7 60 Port Configuration...
Page 270: ...clear snmp interface 8 42 SNMP Configuration...
Page 396: ...clear port txq 12 10 Port Priority Configuration...
Page 414: ...ip igmp robustness 13 18 IGMP Configuration...
Page 542: ...clear arpinspection statistics 17 32 DHCP Snooping and Dynamic ARP Inspection...
Page 546: ...Enabling Router Configuration Modes 18 4 Preparing for Router Mode...
Page 640: ...traceroute ipv6 21 10 IPv6 Management...
Page 698: ...show ipv6 dhcp binding 24 20 DHCPv6 Configuration...
Page 746: ...show ipv6 ospf virtual link 25 48 OSPFv3 Configuration...
Page 834: ...ip access group 26 88 Authentication and Authorization Configuration...
Page 848: ...TACACS Configuration clear tacacs interface 27 14...
Page 866: ...sFlow Configuration show sflow agent 28 18...
Page 872: ...Index 4...