H3C Technologies H3C SecBlade LB Cards - Manual (Page 25)

19
Item Description
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 Layer 7 server load balancing.
ACL Apply an ACL to restrict clients' access to the real service group.
Advanced
Configura
tion
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 product will not assign services to it in the standby time.
After the standby time is reached, the LB product will assign services to the server
or network device gradually within the slow-online time. After the slow-online time
is reached, the LB product will assign services to the server or network device
normally.
Standby
Time
Ramp-Up
Time
Creating a real service
1. Select Load Balance > Server Load Balance > IPv4 from the navigation tree.