The MIB defines objects related to global keepalive
properties in GSLB devices. It contains the tables
for keep alive configuration and statistics. It also
defines related notifications.
Acronyms and their description:
Keepalive : Keepalive is a method by which the GSLB
device periodically checks to see if a
resource associated with an answer is
still active. The action of checking is
known as a keepalive probe.
-keepalive : The GSLB device supports the use of shared
keepalives to minimize traffic between the
GSLB device and the SLBs(Server Load
Balancing) that it is monitoring.
A shared keepalive identifies a common IP
address or resource that provides status
for multiple answers. Shared keepalives
periodically provide state information
(online, offline) of the resources
to the GSLB device.
VIP : Virtual IP Addresses are used by SLBs to
represent content hosted on one or more
servers under their control. The use of
VIPs is to route content to the proper
requesting host without exposing the
device's internal IP address.
CAPP : Content Application Peering Protocol(CAPP) is
a protocol used for intercommunication between
content switching devices.
Answer : Refers to resources to which the GSLB device
resolves DNS requests that it receives.
There are three possible types of answers:
Virtual IP (VIP) : Addresses associated with
a SLB, a web server, a
Name Server (NS) : Configured DNS name server
on the network that can
answer queries that the GSLB
device can not resolve.
Content Routing : A device which uses a
Agent (CRA) resolution process called
DNS race to send identical
and simultaneous responses
back to client D-proxy
for proximity determination.
HTTPHEAD : The HTTP HEAD keepalive type
sends a TCP format HTTP HEAD
request to a web server at
an address you specify,
returning the online status
of the device (in the form
of a 200 response) as well
as information on the web
page status and content