Allied Telesis SwitchBlade x3100 Series User Manual

Introduction UCP Protocol Configuration Overview
Software Reference for SwitchBlade x3100 Series Switches (Layer Two Switching)
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Table 4-22 shows the logic of how this message is processed:.
4.8.2.2 Topology Change Message
This message is used for fault and recovery scenarios:
• Link Fault - When a link fault occurs, each of the nodes spanning the faulty link send the upstream port
topology change message for each of the ufo vlans towards its upstream node. This topology change mes-
sage will indicate to the upstream node that this message is being sent as a result of a link failure in the net-
work.
TABLE 4-22 Processing of Upstream Port Notification Message Sent by
Upstream Device
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
only.
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 layer 2 source address value of the active upstream
node which originally sent the message is stored against
the received ufo vlan vid value.
This is done so that this non-upstream node knows which
node is the upstream node for this ufo vlan in the network
topology in case it has to send the upstream port topology
change message during a network link fail or link recovery
condition.
Check if other UCP enabled ports for this ufo vlan are
configured
If no other UCP-enabled interfaces for this UFO VLAN
configure, message is discarded.
If other UCP-enabled ports for this UFO VLAN are con-
figured, continue.
Received message sent over all other UCP-enabled net-
work module interfaces that have been configured for this
UFO VLAN.
If no other UCP enabled ports for this ufo vlan are con-
figured or if any are configured to be UCP enabled but
are not tagged members of the ufo vlan then the mes-
sage is just discarded.

Allied Telesis SwitchBlade x3100 Series Specifications

General

Brand	Allied Telesis
Model	SwitchBlade x3100 Series
Category	Switch
Language	English