Heartbeat packet EtherTypes
Normal 802.3 IP packets have an EtherType field value of 0x0800. EtherType values other than 0x0800 are understood as Layer 2 frames rather than IP packets.
HA heartbeat packets use the following EtherTypes:
|
Field value |
Function |
Description |
|---|---|---|
|
0x8890 |
Heartbeat |
Heartbeat packets are used by cluster units to find other cluster units, and to verify the status of other cluster units while the cluster is operating. Use the |
|
0x8891 |
Traffic redistribution from primary to subordinate |
These are used when the HA primary needs to redistribute traffic packets and the corresponding session information to the subordinate units in A-A mode. Use the |
|
0x8892 |
Session synchronization |
Session synchronization uses the heartbeat interfaces for communication, unless session synchronization devices are specified. |
|
0x8893 |
HA Telnet sessions (configuration synchronization) |
The Telnet sessions are used to synchronize the cluster configurations, and to connect from one cluster unit's CLI to another when an administrator uses the Use the |