net stp-globals¶

net stp-globals(1) BIG-IP TMSH Manual net stp-globals(1)

NAME
stp-globals - Configures spanning tree protocols on the system.

MODULE
net

SYNTAX
Configure the stp-globals component within the net module using the syntax shown in the following sections.

MODIFY
modify stp-globals
options:
config-name [configuration name]
config-revision [integer]
description [string]
fwd-delay [integer]
hello-time [integer]
max-age [integer]
max-hops [integer]
mode [disabled | mstp | passthru | rstp | stp]
transmit-hold [integer]

edit stp-globals
options:
all-properties
non-default-properties

DISPLAY
list stp-globals
show running-config stp-globals
options:
all-properties
non-default-properties
one-line

DESCRIPTION
Provides the ability to configure spanning tree protocols for the traffic management system. Spanning tree
protocols are Layer 2 protocols for preventing bridging loops. The system supports multiple spanning tree
protocol (MSTP), rapid spanning tree protocol (RSTP), and spanning tree protocol (STP).

EXAMPLES
modify stp-globals mode passthru

Sets the STP mode to passthru. Passthru mode forwards spanning tree bridge protocol data units (BPDUs)
received on any interface to all other interfaces.

modify stp-globals mode disabled

Sets the STP mode to disabled. No MSTP, RSTP, or STP packets are transmitted or received on the interface or
trunk, and the spanning tree algorithm exerts no control over forwarding or learning on the port or the trunk.

OPTIONS
config-name
Specifies the configuration name (1 - 32 characters in length) only when the spanning tree mode is MSTP.
The default configuration name is a string representation of a globally unique MAC address belonging to
the traffic management system.

The MSTP standard introduces the concept of spanning tree regions, which are groups of adjacent bridges
with identical configuration names, configuration revision levels, and assignments of VLANs to spanning
tree instances.

Note: The system default configuration name is a string representation of the globally unique MAC address
of the traffic management system in which hyphens replace the colons in the standard MAC address. For
example, the default configuration name 00-01-D7-68-11-80, represents the MAC address 00:01:D7:68:11:80.

config-revision
Specifies the revision level of the MSTP configuration only when the value of the mode option is mstp.
The specified number must be in the range 0 through 65535. The default value is 0 (zero).

description
User defined description.

fwd-delay
In the original STP, the forward delay parameter controlled the number of seconds for which an interface
was blocked from forwarding network traffic after a reconfiguration of the spanning tree topology. This
parameter has no effect when RSTP or MSTP are used, as long as all bridges in the spanning tree use the
RSTP or MSTP protocol. If any legacy STP bridges are present, then neighboring bridges must fall back to
the old protocol, whose reconfiguration time is affected by the value of the fwd-delay option. The
default value is 15 seconds, and the valid range is 4 to 30.

hello-time
Specifies the time interval in seconds between the periodic transmissions that communicate spanning tree
information to the adjacent bridges in the network. The default value is 2 seconds, and the valid range
is 1 - 10. The default value is optimal in virtually all cases. F5 Networks recommends that you do not
change the value of the hello-time option.

max-age
Specifies the number of seconds for which spanning tree information received from other bridges is
considered valid. The default value is 20 seconds, and the valid range is 6-40 seconds.

max-hops
Specifies the maximum number of hops an MSTP packet can travel before it is discarded. Use this option
only when the value of the mode option is mstp. The number of hops must be in the range of 1 to 255 hops.
The default number of hops is 20.

mode Specifies one of three spanning tree modes:

disabled
Specifies to discard spanning tree bridge protocol data units (BPDUs) received on any interface.

mstp Specifies multiple spanning tree protocol.

passthru
Forwards spanning tree bridge protocol data units (BPDUs) received on any interface to all other
interfaces. Essentially, passthru mode makes the traffic management system transparent to spanning
tree BPDUs. This is the system default.

rstp Specifies rapid spanning tree protocol (RSTP) converges to a fully-connected state quickly.

stp The system supports STP mode for legacy systems. If STP is detected in the network, the traffic
management system changes to STP mode even when the mode option is set to disabled, mstp, or rstp.

transmit hold
Specifies the absolute limit on the number of spanning tree protocol packets the traffic management
system may transmit on a port in any hello-time interval. It is used to ensure that spanning tree packets
do not unduly load the network even in unstable situations. The default value is 6 packets, and the valid
range is 1 through 10 packets.

SEE ALSO
edit, interface, list, modify, show, tmsh

COPYRIGHT
No part of this program may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying, recording, or information storage and retrieval systems, for any purpose
other than the purchaser's personal use, without the express written permission of F5 Networks, Inc.

BIG-IP 2016-03-14 net stp-globals(1)