A10E/A28E/A28F Configuration Guide
Alpha-A28E#show
switchport backup
Show related status information of interface backup,
including restoration delay time, restoration mode, and
interface backup groups.
7.2.7 Example for configuring interface backup
Networking requirements
When only link aggregation is configured, all VLAN data comes from only one interface,
where packet discarding occurs and services are impacted. In this situation, you can configure
two link aggregation groups to sharing VLAN data to two interfaces so that load balancing
can work and the protection feature of link aggregation groups can be inherited.
As shown in Figure 7-5, the PC accesses the server through switches. To realize a reliable
remote access from the PC to the server, configure an interface backup group on Switch A and
specify the VLAN list so that the two interfaces concurrently forward services in different
VLANs and share load. Configure Switch A as below:
Switch A is in VLANs 100–150. Port 1 is the primary interface and Port 2 is the backup
interface.
Switch A is in VLANs 151–200. Port 2 is the primary interface and Port 1 is the backup
interface.
When Port 1 or its link fails, the system switches to the backup Port 2 to resume the link.
Switch A should support interface backup while Switch B, Switch C, and Switch D do not
need to support interface backup.
Figure 7-5 Configuring interface backup
Configuration steps
Step 1 Create VLANs 100–200 and add Port 1 and Port 2 to VLANs 100–200.
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