Allied Telesis SwitchBlade x3100 Series User Manual

UCP Protocol Configuration Overview Introduction
4-175
Software Reference for SwitchBlade x3100 Series Switches (Layer Two Switching)
• Link Recovery - When a link fault gets corrected and the recovery is detected then each of the nodes span-
ning this recovered link send the upstream port topology change message for each of the ufo vlans towards
its upstream node. This topology change message will indicate to the upstream node that this message is
being sent as a result of a link recovery in the network.
The non-upstream nodes that originate this topology change message for each of the ufo vlans send the mes-
sage over all the applicable UFO-enabled network ports and the ufo vlan may or may not have an upstream port
(based upon where the fault is) until the node hears from the upstream node again when it receives this topol-
ogy change message.
Each of the other nodes between the originating node and the upstream node receive the Topology Change
Message and take the actions listed in the following table.
TABLE 4-23 Processing of Topology Change Message by Nodes Between
Originating and Upstream Node
Process If Check Condition, Outcome
A classifier rule intercepts this message based upon the
layer 2 destination address value and sends it to the cpu.
The UCP protocol task upon receiving this message will
check to see if the tagged vlan in the message is configured
to be a ufo vlan.
If not, the message is discarded.
If the received tagged vlan in the message is configured
to be a ufo vlan, continue
Check is made to see if the port on which it was received
is a tagged member of the ufo vlan
If not, the message is discarded
If tagged member, continue.
Check if message is received on UCP enabled interface If interface not configured to be UCP enabled, message
discarded.
If interface UCP enabled, continue.
The message is sent as is over all the other applicable UCP
enabled network ports. The ufo vlan may or may not have
an upstream port (based upon where the fault is) until the
node hears from the upstream node again when it receives
this topology change message
Topology Change Message received by upstream node
A classifier rule intercepts this message based upon the
layer 2 destination address value and sends it to the cpu.
The UCP protocol task upon receiving this message will
check to see if the tagged vlan in the message is configured
to be a ufo vlan
If not, the message is discarded.
If the received tagged vlan in the message is configured
to be a ufo vlan, continue
Check is made to see if the port on which it was received
is a tagged member of the ufo vlan
If not, the message is discarded
If tagged member, continue

Allied Telesis SwitchBlade x3100 Series Specifications

General

Brand	Allied Telesis
Model	SwitchBlade x3100 Series
Category	Switch
Language	English