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Using the Business Policy Switch 2000 Version 1.2
•Because some STP-compliant devices do not support tagging, you can
configure whether to send tagged or untagged BPDUs, even from tagged
ports, with the BPS 2000 with software version 1.2. The VLAN ID for the
tagged BPDUs will be 4000+STG ID.
•An untagged port cannot span multiple STGs.
•When you add a port to a VLAN that belongs to an STG, the port is also
added to the STG. However, if the port you are adding is an unt agged port and
is already a member of an STG, that port will no t be added to an additional
STG because an untagged port cannot belong to more that one STG. As an
example, assume that VLAN1 belongs to STG1. You add an untagged port,
port 1, that does not belong to any STG to VLAN1, and port 1 will become
part of STG1.
However, if in the example explained above, the untagged port 1 already
belongs to STG2, then port will not become a member of STG1.
•When you remove a port from VLAN that belongs to an STG, that port will
also be removed from the STG. However, if that port belongs to another
VLAN in the same STG, the port remains in the ST G .
As an example, assume that port 1 belongs to VLAN1, and VLAN1 belongs
to STG1. When you remove port 1 from VLAN1, port 1 is also removed from
STG1.
However, if port 1 belongs to both VLAN1 and VLAN2 and both VLANs
belong to STG1, removing port 1 from VLAN1 does not remove port 1 from
STG1 because VLAN2 is still a member of STG1.
•An STG cannot be deleted until you disable it. Additionally, you cannot delete
an STG while it contains VLAN members, so you must first delete the
VLANs from the STG.