Brocade Virtual ADX Global Server Load Balancing Guide (Supporting ADX v03.1.00) - Manual (Page 180)

170 Brocade Virtual ADX Global Server Load Balancing Guide
53-1003245-01
Displaying GSLB for IPv6 configurations
2
IP addresses The column of IP addresses lists the IP addresses the authoritative DNS
server associated with the host name in the DNS reply. These are the
servers that contain the content for the host. In this example, the
servers contain the content for www.brocade.
After evaluating the addresses using the GSLB policy, the GSLB Brocade
Virtual ADX marks each address that passes the algorithm with an
asterisk (*). An IP address that does not have an asterisk in front of it
has not passed the GSLB algorithm and cannot be selected as the
“best” site.
NOTE: If DNS override is enabled, only the addresses configured in the
host’s IP list have asterisks and are valid choices for the best
site. Refer to
“Enabling DNS override” on page 132.
Source The value following each server IP address indicates how the Brocade
Virtual ADX 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
“Enabling DNS override” on
page 132.
•
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 Brocade Virtual ADX 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 Brocade Virtual ADX.
•
real-ip : The address is a real server.
State The state of the server. The Brocade Virtual ADX determines the state
based on the results of the Layer 7 health checks sent to the server. The
Brocade Virtual ADX 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 Brocade Virtual ADX 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 Brocade Virtual ADX 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.
TABLE 18 GSLB zone and host application information (Continued)
Field Description