3.2.2.7.1 IEEE 802.1x Device Settings
The following IEEE 802.1x parameters can be changed on Orion3/MiniFlex device:
IEEE 802.1x Enable / Disable
Enables or Disables IEEE 802.1x protocol on a LAN port
IEEE 802.1x SHOST/MHOST/MAUTH
If IEEE 802.1x is enabled on a LAN port the port may work in these three modes:
• Single-host (mode option SHOST): only one host (MAC-address) can be authenticated on
the port, others hosts will be blocked.
• Multi-host (mode option MHOST): once one host has been authenticated, port is allowed to
pass traffic from any other hosts.
• Multi-auth (mode option MAUTH): multiple hosts can be authenticated on a port, but only
authenticated hosts are allowed to pass traffic.
As IEEE 802.1x protocol relays on RADIUS protocol and use encrypted messages the RADIUS
and SNTP clients must be configured first.
3.2.2.8 Rapid Spanning Tree Protocol
The system supports Rapid Spanning Tree Protocol (RSTP) according to IEEE 801.1d 2004
recommendation. All available Ethernet ports as well as all available WAN interfaces could
participate in RSTP construction. A WAN interface could be configured to carry Ethernet data
over DSL line or over E1 interface. If several DSL links or E1 interfaces are combined into
MULTIWAN, this MWAN will participate in RSTP construction too.
The RSTP itself is a protocol used for dynamic link switching in networks with ring topology. The
ring topology improves reliability of data networks; nevertheless Ethernet networks must have
only one active path between any of two nodes to prevent packet loop. Ethernet switches with
enabled RSTP detect paths availability in a ring and quickly select active path, discarding other
paths. All RSTP-enabled devices exchange information about topology change in so-called BPDU
packets.
Root Bridge
One switch in a RSTP-enabled network must acts as Root Bridge. Root Bridge selection will be
done automatically according to Bridge ID – a unique ID that each member of RSTP network has.
Bridge ID is a combination of Switch MAC address and Bridge Priority. Switch with smallest Bridge
Priority will act as Root Bridge. If two or more switches have same priority, Switch with less MAC
address will become Root Bridge.
Port Roles
After Root Bridge has been selected, other switches define their ports role. The port that has the
shortest path to Root Bridge will become Root Port. The opposite port on the other switch will
become Designated Port. The Root Bridge has Designated Ports only, while other switches have
one Root port and could have Designated Port connected to other switches
A Root and Designated ports are active, they learn and forward packets. Other ports have
blocking state. They could act as Alternate port or as Backup port. Please take a look to a picture
below:
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