R3721-F3210-F3171-HP High-End Firewalls High Availability Configuration Guide-6PW101

59
Figure 33 Relationship between a node, link and channel
Packet sending modes
IPC uses one of the following modes to send packets for upper layer application modules:
• Unicast—One node sends packets to another node.
• Multicast—One node sends packets to several other nodes. This mode includes broadcast, a
special multicast. To use multicast mode, an application module must create a multicast group that
includes a set of nodes. Multicasts destined for this group are sent to all the nodes in the group. An
application module can create multiple multicast groups. Creation and deletion of a multicast group
or group member depend on the application module.
• Mixcast—Supports both unicast and multicast.
IPC assigns one queue for each mode. An upper layer application module automatically selects one
mode as needed.
Enabling IPC performance statistics
The IPC performance statistics function provides the most recent 10-second, 1-minute, and 5-minute traffic
input and output statistics for IPC nodes. If this function is disabled, the display ipc performance
command displays the statistics collected before IPC performance statistics was disabled.
To enable IPC performance statistics:
Task Command Remarks
Enable IPC performance
statistics in user view.
ipc performance enable { node node-id |
self-node } [ channel channel-id ]
By default, the function is disabled.
Node 1
IPC
Application 2
Application 3Application 1
Node 2
IPC
Application 2
Application 3Application 1
C
han
nel
1
Ch
an
n
el 2