H3C Technologies H3C S3600 Series Switches - Manual (Page 796)

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fabric connection is established, the FTM program automatically re-numbers the devices or you can
manually configure the Unit ID of them.
The master in a fabric collects the newest configurations of the user and the slaves periodically
synchronize the configurations from the master. In this way, the entire fabric can operate with the same
configurations.
DRR
DRR is used to implement redundancy routing backup. The devices in a fabric run their independent
routing protocols and maintain their own routing tables. Unlike a common layer 3 switch, a fabric
member does not generate a layer 3 forwarding table to forward packets; instead, it uploads the routing
table to the master, which generates a forwarding table used by the entire fabric by integrating the
routing tables of all the devices. Then each slave synchronizes this forwarding table from the master
and takes it as the basis for layer 3 forwarding.
In this way, the forwarding table entries of each device in the fabric can be consistent. Even if the master
fails, other devices can use the forwarding table synchronized from the master to perform layer 3
forwarding, thus ensuring the accuracy of forwarding path. After re-electing the master, the fabric will
restart routing update.
DLA
As a new link aggregation mode, DLA can improve fault tolerance and redundancy backup of user
networks.
Link aggregation enables you to configure ports on the same device as an aggregation port group,
avoiding network interruptions resulted from single port failure. Based on link aggregation, DLA
provides a more reliable solution, with which you can select ports on different devices to form an
aggregation port group. In this way, single port failure can be avoided and network reliability can be
greatly improved, because the fabric can communicate with the destination network through ports on
other devices in case a single device fails.
IRF Fabric Configuration
IRF Fabric Configuration Task List
Complete the following tasks to configure IRF fabric:
Task Remarks
Specifying the Fabric Port of a Switch Required
Specifying the VLAN Used to Form an IRF Fabric Optional
Setting a Unit ID for a Switch Optional
Assigning a Unit Name to a Switch Optional
Assigning an IRF Fabric Name to a Switch Optional
Setting the IRF Fabric Authentication Mode Optional
Configuring IRF Automatic Fabric for a Switch Optional