Brocade Virtual ADX Global Server Load Balancing Guide (Supporting ADX v03.1.00) User Manual
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Brocade Virtual ADX Global Server Load Balancing Guide
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Displaying GSLB information
1
Source
The value following each server IP address indicates how the ADX device
learned the address. This field can have one of the following values:
•
cfg – The address is one that you associated with the host as part
of the DNS override feature. Refer to
•
d/c – The address was learned from the DNS server and also is one
that you associated with the host.
•
dns – The address was learned from the DNS server.
In the example above, the ADX device learned about all the IP addresses
associated with the zone name from the DNS server; thus, the source is
listed as “dns”.
Type
The next value indicates the type of address, which can be one of the
following:
•
v-ip – The address is a VIP configured on a ADX device.
•
real-ip – The address is a real server.
State
The state of the server. The ADX device determines the state based on
the results of the Layer 7 health checks sent to the server. The ADX
device sends Layer 7 health checks for each host application you
associate with the zone.
The state can be one of the following:
•
ACTIVE – The server passed the Layer 4 and Layer 7 health checks
and is presumed to be available.
•
DOWN – The server failed a health check. If any of the health
checks are failed, the GSLB ADX device disqualifies this site from
being the “best” site.
NOTE: If the server has multiple applications, all the applications must
pass the health check.
NOTE: The ADX device also uses the results of the health check, if the
server passes the check, in the TCP and App columns under
FlashBack Delay, described below.
Location
The geographic location of the server. The location is based on the IP
address and can be one of the following:
•
ASIA
•
EUROPE
•
N-AM – North America
•
S-AM – South America
The GSLB ADX device can use this information when comparing the
servers in order to select the “best” ones for the client. The GSLB ADX
device prefers servers within the client’s geographic region over servers
in other geographic regions.
TABLE 8
GSLB zone and host application information (Continued)
Field
Description