H3C Technologies H3C SecBlade LB Cards - Manual (Page 11)

3
Table 3 Protection switchover technologies
Technology Introduction Reference
Interface
backup
Interface backup allows interfaces on one device to back up one
another. The main interface transmits services, and the backup
interfaces are in the backup state. When the main interface fails or
the link fails, a backup interface is brought up to transmit services,
increasing network reliability.
"Configuring
interface backup
Stateful failover
Two devices back up the services of each other to ensure that the
services on them are consistent. If one device fails, the other device
can take over the services by using VRRP or dynamic routing
protocols. Because the other device has already backed up the
services, service traffic can pass through the other device, avoiding
service interruption.
"Configuring stateful
failover"
VRRP
VRRP is an error-tolerant protocol, which provides highly reliable
default links on multicast and broadcast LANs such as Ethernet,
avoiding network interruption due to failure of a single link.
"Configuring VRRP"