Brocade Communications Systems ServerIron ADX 12.4.00 Manuale Utente
ServerIron ADX Global Server Load Balancing Guide
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Displaying GSLB information
1
Displaying the default GSLB policy
To display the default GSLB policy, enter the following command.
ServerIronADX(config)# show gslb default
Default metric order: ENABLE
Metric processing order:
1-Server health check
2-Remote ServerIronADX's session capacity threshold
3-Round trip time between remote ServerIronADX and client
4-Geographic location
5-Remote ServerIronADX's available session capacity
6-Server flashback speed
7-Least response selection
DNS active-only: DISABLE DNS best-only: DISABLE DNS override: DISABLE
Modify DNS response TTL: ENABLE
DNS TTL: 10 (sec), DNS check interval: 30 (sec)
Remote ServerIronADX status update period: 30 (sec)
Session capacity threshold: 90%, session capacity tolerance: 10%
Round trip time tolerance: 10%, round trip time explore percentage: 5%
Round trip time cache prefix: 20, round trip time cache interval: 120 (sec)
Flashback appl-level delay tolerance: 10%, TCP-level delay tolerance: 10%
Syntax: show gslb default
This display shows the following information.
TABLE 13
GSLB policy information
This field...
Displays...
Default algorithm
Indicates whether this policy is in effect. The value can be one of the following:
•
Disable
•
Enable
If the state is Disable, then a user-configured policy is in effect instead.
Metric processing order
Indicates the order in which the selection metrics are applied to the server
addresses in the DNS reply. For information about the metrics, refer to
addresses in the DNS reply. For information about the metrics, refer to
DNS active-only
Indicates whether the GSLB ServerIron ADX removes IP addresses from the DNS
response if those addresses fail a health check. This field can have one of the
following values:
response if those addresses fail a health check. This field can have one of the
following values:
•
DISABLE: The ServerIron ADX does not remove the IP addresses from the
DNS response.
DNS response.
•
ENABLE: The ServerIron ADX removes IP addresses that fail a health check
from the DNS response.
from the DNS response.
DNS best-only
Indicates whether you have configured the ServerIron ADX to remove all IP
addresses except the “best” address from DNS replies. This field can have one
of the following values:
addresses except the “best” address from DNS replies. This field can have one
of the following values:
•
DISABLE: The ServerIron ADX does not remove all addresses except the
best one.
best one.
•
ENABLE: The ServerIron ADX removes all addresses except the best one.
NOTE: Even when this feature is enabled, if the GSLB policy does not result in
selection of a best address, the DNS reply can still contain more than
one address.
one address.