Enterasys Networks ENTERASYS ATX - Manual (Page 33)

Managing the Hub 2-19
The ATX Switch Chassis View
Transmitting BPDUs
You can configure whether or not this port will transmit BPDUs (Bridge Protocol
Data Units). BPDUs are used in the Spanning Tree process. Bridges communicate
Spanning Tree Algorithm information via BPDUs. With BPDUs, all network
bridges collectively determine the current network topology and communicate
with each other to ensure that the topology information is kept current.
1. Click in the Transmit BPDUs selection box to determine if the port will
transmit BPDUs.
• If the Transmit BPDUs option is selected, 802.1d and source-routing spanning
tree packets are transmitted as usual.
• If the Transmit BPDUs option is not selected, BPDU packets are not
transmitted.
Source Route Configuration
If the bridge port is configured for Source Route or Source Route Transparent
bridging, you can configure some of the source route bridging parameters from
the Bridge Configuration window.
Ring Number
The Ring Number is the unique network number of the target network segment
that the bridge attaches to. Valid entries range from 0-fff (hexadecimal).
Individual ports within the ATX Chassis should each be assigned unique values
for this field.
Bridge Number
The Bridge Number uniquely identifies this bridge port. The Bridge Number you
enter should be between the range of 0 and f (hexadecimal).
Spanning Tree Explorer Modes
The Spanning Tree Explorer Span Mode determines how a bridge port behaves
when it receives a STE packet (also known as Single Route Explorer packet). You
can set the Spanning Tree mode to one of the three possible modes.
Auto The port will forward an STE packet when it is in the
Forwarding state; otherwise, it will discard the packet.
This mode can only be used by a bridge that implements
NOTE
Disabling the transmission of BPDUs is needed for interoperability with non-802.1d
spanning tree protocols (e.g., DEC LanBridge 100).