gtm global-settings load-balancing
gtm global-settings load-balanBIG-IP)TMSHgtmnglobal-settings load-balancing(1)
NAME
load-balancing - Configures the load balancing settings for the Global
Traffic Manager(tm).
MODULE
gtm global-settings
SYNTAX
Modify or display the load-balancing component within the gtm global-
settings module using the syntax in the following sections.
MODIFY
modify load-balancing
options:
failure-rcode [noerror | formerr | servfail | nxdomain | notimpl | refused]
failure-rcode-ttl [integer]
failure-rcode-response [disabled | enabled]
ignore-path-ttl [no | yes]
respect-fallback-dependency [no | yes]
topology-longest-match [no | yes]
topology-prefer-edns0-client-subnet [disabled | enabled]
verify-vs-availability [no | yes]
edit load-balancing
options:
all-properties
non-default-properties
DISPLAY
list
list load-balancing
show running-config load-balancing
show running-config load-balancing [option]
options:
all-properties
non-default-properties
one-line
DESCRIPTION
You can use the load-balancing component to modify or display the load
balancing settings for the Global Traffic Manager.
EXAMPLES
modify load-balancing ignore-path-ttl yes
Specifies that dynamic load balancing methods can use path data, even
after the time-to-live (TTL) for the path data expires.
list load-balancing all-properties
Displays all properties of the load balancing settings for the Global
Traffic Manager.
OPTIONS
failure-rcode
Specifies the DNS RCODE used when failure-rcode-response is
enabled. Default is noerror. Options include noerror (no type
exists at this name), formerr (format error in query), servfail
(unable to process query), nxdomain (name does not exist), notimpl
(no support for this kind of query), and refused (refuse to
process based on policy). If failure-rcode-ttl is non-zero, only
the Authority section of the noerror or nxdomain response will
include a SOA record.
failure-rcode-response
When enabled, specifies that the system returns a RCODE response
to Wide IP requests after exhausting all load-balancing methods.
This affects all Wide IPs and may only be overridden by a more
specific enabled configuration of a Wide IP. This response is an
authoritative empty answer from the system for record requests.
With this option enabled, the system responds faster to requests
for which it does not have viable answers configured. The default
value is disabled.
failure-rcode-ttl
Specifies the negative caching TTL of the SOA for the RCODE
response. The default is 0, meaning no SOA is included (i.e. no
caching).
ignore-path-ttl
Specifies, when set to yes, that dynamic load balancing methods
can use path data, even after the time-to-live (TTL) for the path
data expires. The default value is no.
respect-fallback-dependency
Specifies, when set to yes, that the system accepts virtual server
status when the load balancing mode changes to the mode specified
by the fallback-mode option of the pool. The default value is no.
topology-longest-match
Specifies, when set to yes, that the system evaluates all topology
records in the topology statement, and then selects the topology
record that most specifically matches the IP address in an LDNS
request (in other words, has the longest match). When this option
is set to no, the system selects the first record in the topology
statement that matches the request.
topology-prefer-edns0-client-subnet
Specifies, when set to enabled, that the system should use the
edns0 client subnet option (if one exists) instead of the source
address when using topology load balancing. When this option is
set to disabled or if the query did not contain a client subnet
option, the system will fall back to the source address.
When disabled this option can be overridden by a per wide IP
setting, gtm wideip [wideip type] [wideip name]
topology-prefer-edns0-client-subnet [disabled | enabled].
verify-vs-availability
Specifies, when set to yes, that the system checks the
availability of virtual servers before sending a connection to
those virtual servers. The default value is no.
SEE ALSO
edit, gtm global-settings general, gtm global-settings metrics, gtm
global-settings metrics-exclusions, list, modify, show, tmsh
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BIG-IP 2017-09gtm global-settings load-balancing(1)