Hirschmann RS20 Programming Manual

Rapid Spanning Tree
Redundanz L2P
Release 5.0 04/09
6.2 Rules for creating the tree structure
89
X If two paths with the same root path costs lead out from a bridge, the port
identifier is used as the last criterion (see fig. 45). This decides which port
is selected.
Figure 46: Flow diagram for specifying the root path
Equal
path costs?
Determine root path
no
yes
Equal
priority in
bridge identification?
Equal
port priority?
yes
yes
Path with lowest
path costs = root path
Path with highest
port priority
= root path
Path with highest
priority in bridge
identification = root path
no
no
Path with lowest
port number
= root path
Root path determined

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