Lantronix SISPM1040-3166-L Web User Guide Rev G PDF 14.13 MB - Page 186

Restricted, Guard, Point to Point, Apply, Reset

Page 186 highlights

Transition Networks SISPM1040-3xxx-L Web User Guide Restricted Role : If enabled, causes the port not to be selected as Root Port for the CIST or any MSTI, even if it has the best spanning tree priority vector. Such a port will be selected as an Alternate Port after the Root Port has been selected. If set, it can cause lack of spanning tree connectivity. It can be set by a network administrator to prevent bridges external to a core region of the network influence the spanning tree active topology, possibly because those bridges are not under the full control of the administrator. This feature is also known as Root Guard. Restricted TCN : If enabled, causes the port not to propagate received topology change notifications and topology changes to other ports. If set it can cause temporary loss of connectivity after changes in a spanning tree's active topology as a result of persistently incorrect learned station location information. It is set by a network administrator to prevent bridges external to a core region of the network, causing address flushing in that region, possibly because those bridges are not under the full control of the administrator or the physical link state of the attached LANs transits frequently. BPDU Guard : If enabled, causes the port to disable itself upon receiving valid BPDU's. Contrary to the similar bridge setting, the port Edge status does not affect this setting. A port entering error-disabled state due to this setting is subject to the bridge Port Error Recovery setting as well. Point to Point : Controls whether the port connects to a point-to-point LAN rather than to a shared medium. This can be automatically determined, or forced either true or false. Transition to the forwarding state is faster for point-to-point LANs than for shared media. Buttons Apply : Click to save changes. Reset : Click to undo any changes made locally and revert to previously saved values. 33763 Rev. G https://www.transition.com Page 186 of 496

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Transition Networks
SISPM1040-3xxx-L Web User Guide
33763 Rev. G
Page
186
of
496
Restricted
Role
: If enabled, causes the port not to be selected as Root Port for the CIST or any MSTI, even if it has
the best spanning tree priority vector. Such a port will be selected as an Alternate Port after the Root Port has
been selected. If set, it can cause lack of spanning tree connectivity. It can be set by a network administrator to
prevent bridges external to a core region of the network influence the spanning tree active topology, possibly
because those bridges are not under the full control of the administrator. This feature is also known as Root
Guard.
Restricted
TCN
: If enabled, causes the port not to propagate received topology change notifications and
topology changes to other ports. If set it can cause temporary loss of connectivity after changes in a spanning
tree
s active topology as a result of persistently incorrect learned station location information. It is set by a
network administrator to prevent bridges external to a core region of the network, causing address flushing in
that region, possibly because those bridges are not under the full control of the administrator or the physical link
state of the attached LANs transits frequently.
BPDU
Guard
: If enabled, causes the port to disable itself upon receiving valid BPDU
s. Contrary to the similar
bridge setting, the port Edge status does not affect this setting. A port entering error-disabled state due to this
setting is subject to the bridge Port Error Recovery setting as well.
Point to Point
: Controls whether the port connects to a point-to-point LAN rather than to a shared medium. This
can be automatically determined, or forced either true or false. Transition to the forwarding state is faster for
point-to-point LANs than for shared media.
Buttons
Apply
: Click to save changes.
Reset
: Click to undo any changes made locally and revert to previously saved values.