Hirschmann RS20 Programming Manual

Rapid Spanning Tree
Redundanz L2P
Release 5.0 04/09
6.6 The Rapid Spanning Tree Protocol
103
Figure 53: Definition of diameter and age
The diameter is the number of connections between the two devices furthest
away from the root bridge.
The parameters
– Forward Delay and
–Max Age
have a relationship to each other:
Forward Delay >= (Max Age/2) + 1
If you enter values that contradict this relationship, the device then
replaces these values with a default value or with the last valid values.
 As required, change and verify the settings and displays that relate
to each individual port (menu bar: Rapid Spanning Tree - Port).
= Root
1
Diameter = 7
Age = 5
23 45
123 45
67
Age = 4
12 3 4

Hirschmann RS20 Specifications

General

Mounting	DIN Rail
Operating Temperature	-40°C to +70°C
Protection Class	IP30
Switching Technology	Store-and-Forward
Product Type	Industrial Ethernet Switch
Port Details	10/100 Mbps Ethernet ports
Switching Capacity	3.2 Gbps
MAC Address Table	8k
Management	Web, SNMP
Redundancy	MRP
Ports	8 or 16