RUGGEDCOM ROX II
CLI User Guide
Chapter 14
Network Redundancy
Configuring STP Globally
643
Parameter
Description
The Rapid Spanning Tree Protocol (RSTP) standard does not address network security.
RSTP must process every received Bridge Protocol Data Unit (BPDU) and take an
appropriate action. This opens a way for an attacker to influence RSTP topology by
injecting RSTP BPDUs into the network. BPDU Guard is a feature that protects the
network from BPDUs received by a port where RSTP-capable devices are not expected
to be attached. If a BPDU is received by a port for which the 'Edge' parameter is set to
'TRUE' or RSTP is disabled, the port will be shut down for the time period specified by this
parameter.
• NO SHUTDOWN: BPDU Guard is disabled.
• UNTIL RESET: The port will remain shut down until the port reset command is issued by
the user.
• SPECIFY: A timeout period is specified for the port using the BPDU Timeout parameter.
bpdu-timeout { bpdu-timeout }
Synopsis:
A 32-bit unsigned integer between 1 and 86400
The time for which a port is shutdown. Only applicable when BPDU Guard Mode is set to
specify
.
fast-root-failover { fast-root-failover }
Synopsis:
{ on, off, on-with-standard-root }
Default:
on
The Fast Root Failover algorithm. Options include:
• Off: The Fast Root Failover algorithm is disabled. As such, a root switch failure may
result in excessive connectivity recovery time in a mesh network.
• On: Fast Root Failover is enabled and the most robust algorithm is used, which
restores network connectivity quickly in case of root bridge failure in a mesh network.
• On with standard root: Fast Root Failover is enabled but a relaxed algorithm is used,
allowing the use of a standard switch in the root role.
dot1w-interop
Synopsis:
{ true, false }
Default:
true
Enables/disables IEEE 802.1w Interoperability
cost-style { cost-style }
Synopsis:
{ stp, rstp }
Default:
stp
The style of link costs to employ. STP uses 16-bit path costs based upon 1x10E9/link
speed (4 for 1Gbps, 19 for 100 Mbps and 100 for 10 Mbps) whereas RSTP uses 32-bit
costs based upon 2x10E13/link speed (20,000 for 1Gbps, 200,000 for 100 Mbps and
2,000,000 for 10 Mbps). Note that RSTP link costs are used only when the bridge version
support is set to allow RSTP and the port does not migrate to the Spanning Tree Protocol
(STP).
5. Configure the RSTP instance settings by configuring the following parameter(s):
Parameter
Description
bridge-priority { bridge-priority }
Synopsis:
{ 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864,
40960, 45056, 49152, 53248, 57344, 61440 }
Default:
32768
The priority assigned to the RSTP/Common Bridge Instance.
6. If necessary, add Multiple Spanning Tree Instances (MSTI). For more information, refer to
“Adding a Multiple Spanning Tree Instance”
7. Type
commit
and press
Enter
to save the changes, or type
revert
and press
Enter
to abort.
Summary of Contents for RUGGEDCOM ROX II
Page 2: ...RUGGEDCOM ROX II CLI User Guide ii ...
Page 4: ...RUGGEDCOM ROX II CLI User Guide iv ...
Page 39: ...RUGGEDCOM ROX II CLI User Guide Table of Contents xxxix 19 5 VLANs 752 ...
Page 40: ...Table of Contents RUGGEDCOM ROX II CLI User Guide xl ...
Page 46: ...Preface RUGGEDCOM ROX II CLI User Guide xlvi Customer Support ...
Page 170: ...Chapter 5 System Administration RUGGEDCOM ROX II CLI User Guide 124 Deleting a Scheduled Job ...
Page 256: ...Chapter 6 Security RUGGEDCOM ROX II CLI User Guide 210 Enabling Disabling a Firewall ...
Page 402: ...Chapter 11 Wireless RUGGEDCOM ROX II CLI User Guide 356 Managing Cellular Modem Profiles ...
