STP Commands
ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
ExtremeWare XOS 11.5 Command Reference Guide
1178
configure stpd default-encapsulation
configure stpd <stpd_name> default-encapsulation [dot1d | emistp | pvst-
plus]
Description
Configures the default encapsulation mode for all ports added to the specified STPD.
Syntax Description
Default
Ports in the default STPD (s0) are
dot1d
mode.
Ports in user-created STPDs are in
emistp
mode.
Usage Guidelines
Care must be taken to ensure that ports in overlapping domains do not interfere with the orderly
working of each domain’s protocol.
By default, when the switch boots for the first time, it automatically creates a VLAN named
default
with
a tag value of 1 and STPD
s0
. The switch associates VLAN
default
to STPD
s0
. All ports that belong to
this VLAN and STPD are in 802.1d encapsulation mode with autobind enabled. If you disable autobind
on the VLAN
default
, that configuration is saved across a reboot.
MSTP STPDs use 802.1D BPDU encapsulation mode by default. To ensure correct operation of your
MSTP STPDs, do not configure EMISTP or PVST+ encapsulation mode for MSTP STPDs.
Naming Conventions.
If your STPD has the same name as another component, for example a VLAN,
Extreme Networks recommends that you specify the identifying keyword as well as the name. If your
STPD has a name unique only to that STPD, the keyword
stpd
is optional.
STP Encapsulation Modes.
You can specify the following STP encapsulation modes:
●
dot1d
—This mode is reserved for backward compatibility with previous STP versions. BPDUs are
sent untagged in 802.1D mode. Because of this, any given physical interface can have only
one
STPD
running in 802.1D mode.
This encapsulation mode supports the following STPD modes of operation: 802.1D, 802.1w, and
MSTP.
●
emistp
—This mode sends BPDUs with an 802.1Q tag having an StpdID in the VLANid field.
This encapsulation mode supports the following STPD modes of operation: 802.1D and 802.1w.
stpd_name
Specifies an STPD name on the switch.
dot1d
Specifies the STP encapsulation mode of operation to be 802.1d.
emistp
Specifies the STP encapsulation mode of operation to be EMISTP.
pvst-plus
Specifies the STP encapsulation mode of operation to be PVST+.
