Series AFS8202M
Alba Fiber Systems Inc. Specifications are subject to change without notice.
Page 50 6/20/14
www.albafiber.net
Industrial Redundant Managed Ethernet Media Converter with 2 Ports
1 x 10/100/1000BaseT(X) Port, 1 x 1000M SFP Port
start from 0, step 4096, till 61440
6.6.2 STP/RSTP/CIST Interface Configuration
Use the CIST Ports Configuration page to configure STA attributes for interfaces when the
spanning tree mode is set to STP or RSTP, or for interfaces in the CIST. STA interface attributes
include path cost, port priority, edge port (for fast forwarding), automatic detection of an edge
port, and point-to-point link type.
You may use a different priority or path cost for ports of the same media type to indicate the
preferred path, edge port to indicate if the attached device can support fast forwarding, or link
type to indicate a point-to-point connection or shared-media connection. (References to “ports”
in this section means “interfaces,” which includes both ports and trunks.)
PATH
Web
Configuration, Spanning Tree, CIST Ports
CLI
STP/Port>
CIST Aggregated Port Configuration & CIST Normal Port Configuration
PARAMETERS
These parameters are displayed:
■
Port – Port identifier.
This field is not applicable to static trunks or dynamic trunks created through LACP. Also, note
that only one set of interface configuration settings can be applied to all trunks.
■
STP Enabled– Sets the interface to enable STA, disable STA, or disable STA with BPDU
transparency. (Default: Enabled) BPDU transparency is commonly used to support BPDU
tunneling, passing BPDUs across a service provider’s network without any changes, there by
combining remote network segments into a single spanning tree. As implemented on this switch,
BPDU transparency allows a port which is not participating in the spanning tree (such as an
uplink port to the service provider’s network) to forward BPDU packets to other ports instead of
discarding these packets or attempting to process them.
■
Path Cost– This parameter is used by the STA to determine the best path between devices.
Therefore, lower values should be assigned to ports attached to faster media, and higher values
assigned to ports with slower media. (Path cost takes precedence over port priority.) By default,
the system automatically detects the speed and duplex mode used on each port, and configures
the path cost according to the values shown below.
Recommended STA Path Cost Range
