Operation Manual

STP Commands
STP Commands
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See Also show spantree on page 13-364
set spantree backbonefast
Enables or disables STP backbone fast convergence on an MX. This feature accelerates port
recovery following the failure of an indirect link.
Syntax set spantree backbonefast {enable | disable}
Defaults STP backbone fast path convergence is disabled by default.
Access Enabled.
History Introduced in MSS Version 1.0.
Usage If you plan to use the backbone fast convergence feature, you must enable it on all the
bridges in the spanning tree.
Examples The following command enables backbone fast convergence:
MX# set spantree backbonefast enable
success: change accepted.
See Also show spantree backbonefast on page 13-366
set spantree fwddelay
Changes the period of time after a topology change that an MX which is not the root bridge waits
to begin forwarding Layer 2 traffic on one or all of the configured VLANs. (The root bridge always
forwards traffic.)
Syntax set spantree fwddelay delay {all | vlan vlan-id}
Defaults The default forwarding delay is 15 seconds.
Access Enabled.
History Introduced in MSS Version 1.0.
Examples The following command changes the forwarding delay on VLAN pink to 20 seconds:
MX# set spantree fwddelay 20 vlan pink
success: change accepted.
See Also show spantree on page 13-364
set spantree hello
Changes the interval between STP hello messages sent by an MX when operating as the root
bridge, on one or all of the configured VLANs.
enable Enables backbone fast convergence.
disable Disables backbone fast convergence.
delay Delay value. You can specify from 4 through 30 seconds.
all Changes the forwarding delay on all VLANs.
vlan
vlan-id
VLAN name or number. MSS changes the forwarding delay on only the specified
VLAN.