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EKI-9500 Series User Manual
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Switching
>
Spanning Tree
>
Statistics
.
Figure 4.251 Switching > Spanning Tree > Statistics
The following table describes the items in the previous figure.
4.4.20
VLAN
Adding Virtual LAN (VLAN) support to a Layer 2 switch offers some of the benefits of
both bridging and routing. Like a bridge, a VLAN switch forwards traffic based on the
Layer 2 header, which is fast, and like a router, it partitions the network into logical
segments, which provides better administration, security and management of multi-
cast traffic.
A VLAN is a set of end stations and the switch ports that connect them. You may
have many reasons for the logical division, such as department or project member-
ship. The only physical requirement is that the end station and the port to which it is
connected both belong to the same VLAN.
Each VLAN in a network has an associated VLAN ID, which appears in the IEEE
802.1Q tag in the Layer 2 header of packets transmitted on a VLAN. An end station
may omit the tag, or the VLAN portion of the tag, in which case the first switch port to
receive the packet may either reject it or insert a tag using its default VLAN ID. A
given port may handle traffic for more than one VLAN, but it can only support one
default VLAN ID.
4.4.20.1
Status
Use the VLAN Status page to view information about the VLANs configured on your
system.
Item
Description
Interface
The port or link aggregation group (LAG) associated with the rest of
the data in the row.
STP BPDUs Rx
The number of classic STP (IEEE 802.1d) BPDUs received by the
interface.
STP BPDUs Tx
The number of classic STP BPDUs sent by the interface.
RSTP BPDUs Rx
The number of RSTP (IEEE 802.1w) BPDUs received by the interface.
RSTP BPDUs Tx
The number of RSTP BPDUs sent by the interface.
MSTP BPDUs Rx
The number of MSTP (IEEE 802.1s) BPDUs received by the interface.
MSTP BPDUs Tx
The number of MSTP BPDUs sent by the interface.
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