Enable High Availability
Note: Leave the High Availability Mode field
set to off until you have defined all your routers and interfaces.
After you have defined your access
routers and their interfaces
and are ready to enable the high availability feature, follow these steps:
1. If the High Availability page is not currently
displayed:
a. Click the setup tab on the navigation bar.
b. From the Choose Setup Page list, select high availability.
The High Availability screen is displayed.  show screen
2. In the High Availability Mode field, select
one of the following:
- basic — When the basic mode is enabled, PacketWise polls
the configured router(s) every 30 seconds to assess the status (link
up or link down) of the WAN link interfaces. If a link goes down, PacketWise
will automatically adjust the total available capacity by subtracting
out the capacity of the down link. As part of this process, it will
adjust the access link size and resize Inbound and/or Outbound partitions
to reflect the available bandwidth.
- advanced — Advanced mode includes all the functionality
of basic mode, plus offers link overload protection. PacketWise will
use SNMP polling to access the actual throughput of each configured
WAN link interface. If an interface approaches its configured capacity,
PacketWise will pace the traffic sent to the router to prevent overloading
any interface. This pacing will also greatly reduce the number of retransmissions.
3. Click apply changes.
Note: In order for the partition size adjustments to take effect,
traffic shaping must be enabled.
After high availability is enabled, you will see additional information
in the High Availability Configuration.
| Item |
Description |
| Current Access Speed |
The Current Access Speed is the total of all interface capacities
that are active (up). A router’s capacity is determined by the
values set for the override capacity or by summing all the interfaces’
capacities (if no override has been set). When high availability is
enabled and a link becomes inactive, the Current Access Speed will
reflect this reduction of available bandwidth (that is, the inactive
link’s capacity will be subtracted out, assuming it is less than
the override value). |
| Available Capacity |
The Available Capacity is the total bps available based on the
values configured for the interfaces and routers. It is the sum
of the routers’ capacities (without regard to whether its interfaces
are up or down).
|
| Statistics |
Router Status: Indicates whether the router is up or down
Interface Status: Indicates whether the interface is up
or down
Interface Throughput: the actual throughput (based on SNMP
polling) measured in bits per second (bps); this information is
shown only in advanced mode
|
See also:
Disable High Availability
|
