Extreme Networks ExtremeWare 7.5, Command Reference Manual

Page: 1448 / 2546

1448 ExtremeWare 7.5 Command Reference Guide
STP Commands
configure stpd ports link-type
configure stpd <spanning tree name> ports link-type [auto | edge |
broadcast | point-to-point] <portlist>
Description
Configures the ports in the specified STPD as auto, edge, broadcast or point-to-point link types.
Syntax Description
Default
All ports are broadcast link types.
Usage Guidelines
The default, broadcast links, supports legacy STP (802.1d) configurations.
If you configure a port to be an edge port, the port immediately enters the forwarding state. Edge ports
remain in the forwarding state unless the port receives a BPDU.
RSTP does not send any BPDUs from an edge port, nor does it generate topology change events when
an edge port changes its state.
RSTP rapidly moves the designated ports of a point-to-point link type into the forwarding state. This
behavior is supported by RSTP only.
An auto link behaves like a point-to-point link if the link is in full-duplex mode or if link aggregation is
enabled on the port; otherwise, an auto link behaves like a broadcast link. If a non-STP switch exists
between several switches operating in 802.1w mode with auto links, the non-STP switch may negotiate
full-duplex even though the broadcast domain extends over several STP devices. In this situation, an
802.1w port may advance to the “forwarding” state more quickly than desired.
If the switch operates in 802.1d mode, any configured port link type will behave the same as the
broadcast link type.
spanning tree name Specifies an STPD name on the switch.
auto Specifies the switch to automatically determine the port link type. An auto link behaves
like a point-to-point link if the link is in full duplex mode or if link aggregation is enabled
on the port. Used for 802.1w configurations.
edge Specifies a port that does not have a bridge attached. An edge port is placed and held in
the STP forwarding state unless a BPDU is received by the port.
broadcast Specifies a port attached to a LAN segment with more than two bridges. Used for 802.1d
configurations. A port with broadcast link type cannot participate in rapid reconfiguration.
By default, all ports are broadcast links.
point-to-point Specifies a port attached to a LAN segment with only two bridges. A port with
point-to-point link type can participate in rapid reconfiguration. Used for 802.1w
configurations.
portlist Specifies one or more ports or slots and ports. On a modular switch, can be a list of
slots and ports. On a stand-alone switch, can be one or more port numbers. May be in
the form 1, 2, 3-5, 2:*, 2:5, 2:6-2:8.