Server Health Check Probes
About Server Health Check Probes
This chapter describes:
l
How Equalizer uses health check probes to ensure server availability.
l
How you can configure probe parameters and options to tailor them for your specific con-
figuration and applications.
On Equalizer, a "server" equates to an application running at an IP address and a port. Equalizer
server health check probes ensure that load balancing decisions include only those applications
that are currently available, and can be tailored to provide application-specific probes.
The types of probes Equalizer uses on a server depend upon the server’s protocol setting (UDP or
TCP), and are summarized below:
Layer
Protocol
Daemon
Port
Details
Layer 3
ICMP
l3pd
N/A
Echo request/reply
Layer 4
UDP/IP
udppd
53
DNS
111
(RPC4) Portmap
2049
(RPC4) NFS
Layer 4
TCP/IP
acvd
N/A
TCP (connect only)
Layer 7
N/A
ACV (Plaintext)
N/A
ACV (SSL)
hcd
1510 (default)
Simple Health Check
vlbd
N/A
VLB Health Check
640
Copyright © 2014 Coyote Point Systems, A Subsidiary of Fortinet, Inc.
Содержание Equalizer GX Series
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