HP VPN Firewall Appliances High Availability Configuration Guide

199
Item Descri
p
tion
Character
Identification of a real service group in Layer 7 server load balancing, that is,
the common characteristics of all the real services in the real service group.
The character configuration depends on the real service group method
specified in the virtual service. The virtual service selects an appropriate real
service group for different packets according to the real service group
method and characters of the real services.
• If no character is specified, the real service group matches all packets. In
case that other real service groups configured with characters do not
match any packets, the packets match this real service group.
• If the real service group method is Accept-Encoding, configure the
character as the compression mode that the client browser can accept, for
example, gzip.
• If the real service group method is Accept-Language, configure the
characters as the language code that the client browser supports and
understands, for example, zh-cn.
• If the real service group method is Host, configure the character as the
host name, for example, www.host.com.
• If the real service group method is Request-Method, configure the
character as the method taken on the resources identified by Request-URI,
for example, GET.
• If the real service group method is URL-File, configure the character as file
type, for example, txt.
• If the real service group method is URL-Function, configure the character
as the directory for obtaining resources, for example, /wcn/loadbalance.
Configure the character as the root directory first.
• If the real service group method is User-Agent, configure the character as
the client browser type, for example, Mozilla/5.0.
• If the real service group method is another field in the HTTP header,
configure the character as the field in the HTTP header that a user is
interested in. For example, if a user types a real service group match
criterion Cookie, you need to configure the character as the value of the
Cookie field.
• If the real service group method is RTSP URL, configure the character as
the directory for obtaining resources, for example, /wcn/loadbalance.
• If the real service group method is DHCP Relay Agent IP, configure the
character as the IP address of the DHCP Relay, for example, 192.168.0.1.
IMPORTANT:
This configuration only takes effect on server load balancing.
ACL Apply an ACL to restrict clients' access to the real service group.
Advanced
Configuration
Enable
Slow-Online
When you add a server or a network device to a cluster, some servers or
network devices cannot take on a large amount of services immediately, so
you can enable the slow-online function. With slow-online enabled, after the
server or network device goes online, the LB device will not assign services to
it in the standby time. After the standby time is reached, the LB device will
assign services to the server or network device gradually within the
slow-online time. After the slow-online time is reached, the LB device will
assign services to the server or network device correctly.
Standby Time
Ramp-Up
Time