['
About
', 'Virtual
', 'Servers
', 'Introduction
', 'to
', 'virtual
', 'servers
', 'A
', 'virtual
', 'server
', 'is
', 'one
', 'of
', 'the
', 'most
', 'important
', 'components
', 'of
', 'any
', 'BIG-IP
', '®
', 'system
', 'configuration.
', 'A
', 'virtual
', 'server
', 'is
', 'a
', 'traffic-management
', 'object
', 'on
', 'the
', 'BIG-IP
', 'system
', 'that
', 'is
', 'represented
', 'by
', 'a
', 'virtual
', 'IP
', 'address
', 'and
', 'a
', 'service,
', 'such
', 'as
', '192.168.20.10:80
', '.
', 'When
', 'clients
', 'on
', 'an
', 'external
', 'network
', 'send
', 'application
', 'traffic
', 'to
', 'virtual
', 'server,
', 'the
', 'virtual
', 'server
', 'listens
', 'for
', 'that
', 'traffic
', 'and,
', 'through
', 'destination
', 'address
', 'translation,
', 'directs
', 'the
', 'traffic
', 'according
', 'to
', 'the
', 'way
', 'that
', 'you
', 'configured
', 'the
', 'settings
', 'on
', 'the
', 'virtual
', 'server.
', 'A
', 'primary
', 'purpose
', 'of
', 'a
', 'virtual
', 'server
', 'is
', 'to
', 'distribute
', 'traffic
', 'across
', 'a
', 'pool
', 'of
', 'servers
', 'that
', 'you
', 'specify
', 'in
', 'the
', 'virtual
', 'server
', 'configuration.
', 'o
', 'customize
', 'the
', 'way
', 'that
', 'the
', 'BIG-IP
', 'system
', 'processes
', 'various
', 'types
', 'of
', 'traffic,
', 'you
', 'can
', 'assign
', 'profiles
', 'to
', 'a
', 'virtual
', 'server.
', 'For
', 'example,
', 'through
', 'profile
', 'assignment,
', 'a
', 'virtual
', 'server
', 'can
', 'enable
', 'compression
', 'on
', 'HTTP
', 'request
', 'data
', 'as
', 'it
', 'passes
', 'through
', 'the
', 'BIG-IP
', 'system,
', 'or
', 'decrypt
', 'and
', 're-encrypt
', 'SSL
', 'connections
', 'and
', 'verify
', 'SSL
', 'certificates.
', 'For
', 'each
', 'type
', 'of
', 'traffic,
', 'such
', 'as
', 'TCP,
', 'UDP,
', 'HTTP,
', 'SSL,
', 'SIP,
', 'and
', 'FTP,
', 'you
', 'can
', 'assign
', 'a
', 'custom
', 'profile
', 'to
', 'the
', 'virtual
', 'server
', 'or
', 'use
', 'the
', 'default
', 'profile.
', 'When
', 'you
', 'create
', 'a
', 'virtual
', 'server,
', 'you
', 'specify
', 'the
', 'pool
', 'or
', 'pools
', 'that
', 'you
', 'want
', 'to
', 'use
', 'as
', 'the
', 'destination
', 'for
', 'any
', 'traffic
', 'coming
', 'from
', 'that
', 'virtual
', 'server.
', 'You
', 'also
', 'configure
', 'its
', 'general
', 'properties,
', 'profiles,
', 'SNATs,
', 'and
', 'other
', 'resources
', 'you
', 'want
', 'to
', 'assign
', 'to
', 'it,
', 'such
', 'as
', 'iRules
', 'or
', 'session
', 'persistence
', 'types.
', 'Note:
', 'To
', 'ensure
', 'that
', 'a
', 'server
', 'response
', 'returns
', 'through
', 'the
', 'BIG-IP
', 'system,
', 'you
', 'can
', 'either
', 'configure
', 'the
', 'default
', 'route
', 'on
', 'the
', 'server
', 'to
', 'be
', 'a
', 'self
', 'IP
', 'address
', 'on
', 'an
', 'internal
', 'VLAN,
', 'or
', 'you
', 'can
', 'create
', 'a
', 'SNAT
', 'and
', 'assign
', 'it
', 'to
', 'a
', 'virtual
', 'server.
', 'Types
', 'of
', 'virtual
', 'servers
', 'You
', 'can
', 'create
', 'several
', 'different
', 'types
', 'of
', 'virtual
', 'servers,
', 'depending
', 'on
', 'your
', 'particular
', 'configuration
', 'needs.
', 'Table
', '1.
', 'Types
', 'of
', 'virtual
', 'servers
', 'Type
', 'Description
', 'Standard
', 'A
', 'Standard
', 'virtual
', 'server
', '(also
', 'known
', 'as
', 'a
', 'load
', 'balancing
', 'virtual
', 'server)
', 'directs
', 'client
', 'traffic
', 'to
', 'a
', 'load
', 'balancing
', 'pool
', 'and
', 'is
', 'the
', 'most
', 'basic
', 'type
', 'of
', 'virtual
', 'server.
', 'When
', 'you
', 'first
', 'create
', 'the
', 'virtual
', 'server,
', 'you
', 'assign
', 'an
', 'existing
', 'default
', 'pool
', 'to
', 'it.
', 'From
', 'then
', 'on,
', 'the
', 'virtual
', 'server
', 'automatically
', 'directs
', 'traffic
', 'to
', 'that
', 'default
', 'pool.
', 'Forwarding
', '(Layer
', '2)
', 'You
', 'can
', 'set
', 'up
', 'a
', 'Forwarding
', '(Layer
', '2)
', 'virtual
', 'server
', 'to
', 'share
', 'the
', 'same
', 'IP
', 'address
', 'as
', 'a
', 'node
', 'in
', 'an
', 'associated
', 'VLAN.
', 'To
', 'do
', 'this,
', 'you
', 'must
', 'perform
', 'some
', 'additional
', 'configuration
', 'tasks.
', 'These
', 'tasks
', 'consist
', 'of:
', 'creating
', 'a
', 'VLAN
', 'group
', 'that
', 'includes
', 'the
', 'VLAN
', 'in
', 'which
', 'the
', 'node
', 'resides,
', 'assigning
', 'a
', 'self-IP
', 'address
', 'to
', 'the
', 'VLAN
', 'group,
', 'and
', 'disabling
', 'the
', 'virtual
', 'server
', 'on
', 'the
', 'relevant
', 'VLAN.
', 'Forwarding
', '(IP)
', 'A
', 'Forwarding
', '(IP)
', 'virtual
', 'server
', 'is
', 'just
', 'like
', 'other
', 'virtual
', 'servers,
', 'except
', 'that
', 'a
', 'forwarding
', 'virtual
', 'server
', 'has
', 'no
', 'pool
', 'members
', 'to
', 'load
', 'balance.
', 'The
', 'virtual
', 'server
', 'simply
', 'forwards
', 'the
', 'packet
', 'directly
', 'to
', 'the
', 'destination
', 'IP
', 'address
', 'specified
', 'in
', 'the
', 'client
', 'request.
', 'When
', 'you
', 'use
', 'a
', 'forwarding
', 'virtual
', 'server
', 'to
', 'direct
', 'a
', 'request
', 'to
', 'its
', 'originally-specified
', 'destination
', 'IP
', 'address,
', 'the
', 'BIG-IP
', 'system
', 'adds,
', 'tracks,
', 'and
', 'reaps
', 'these
', 'connections
', 'just
', 'as
', 'with
', 'other
', 'virtual
', 'servers.
', 'You
', 'can
', 'also
', 'view
', 'statistics
', 'for
', 'a
', 'forwarding
', 'virtual
', 'servers.
', 'Performance
', '(HTTP)
', 'A
', 'Performance
', '(HTTP)
', 'virtual
', 'server
', 'is
', 'a
', 'virtual
', 'server
', 'with
', 'which
', 'you
', 'associate
', 'a
', 'Fast
', 'HTTP
', 'profile.
', 'Together,
', 'the
', 'virtual
', 'server
', 'and
', 'profile
', 'increase
', 'the
', 'speed
', 'at
', 'which
', 'the
', 'virtual
', 'server
', 'processes
', 'HTTP
', 'requests.
', 'Performance
', '(Layer
', '4)
', 'A
', 'Performance
', '(Layer
', '4)
', 'virtual
', 'server
', 'is
', 'a
', 'virtual
', 'server
', 'with
', 'which
', 'you
', 'associate
', 'a
', 'Fast
', 'L4
', 'profile.
', 'Together,
', 'the
', 'virtual
', 'server
', 'and
', 'profile
', 'increase
', 'the
', 'speed
', 'at
', 'which
', 'the
', 'virtual
', 'server
', 'processes
', 'Layer
', '4
', 'requests.
', 'Stateless
', 'A
', 'stateless
', 'virtual
', 'server
', 'prevents
', 'the
', 'BIG-IP
', 'system
', 'from
', 'putting
', 'connections
', 'into
', 'the
', 'connection
', 'table
', 'for
', 'wildcard
', 'and
', 'forwarding
', 'destination
', 'IP
', 'addresses.
', 'When
', 'creating
', 'a
', 'stateless
', 'virtual
', 'server,
', 'you
', 'cannot
', 'configure
', 'SNAT
', 'automap,
', 'iRules,
', 'or
', 'port
', 'translation,
', 'and
', 'you
', 'must
', 'configure
', 'a
', 'default
', 'load
', 'balancing
', 'pool.
', 'Note
', 'that
', 'this
', 'type
', 'of
', 'virtual
', 'server
', 'applies
', 'to
', 'UDP
', 'traffic
', 'only.
', 'Reject
', 'A
', 'Reject
', 'virtual
', 'server
', 'specifies
', 'that
', 'the
', 'BIG-IP
', 'system
', 'rejects
', 'any
', 'traffic
', 'destined
', 'for
', 'the
', 'virtual
', 'server
', 'IP
', 'address.
', 'DHCP
', 'A
', 'DHCP
', 'virtual
', 'server
', 'relays
', 'Dynamic
', 'Host
', 'Control
', 'Protocol
', '(DHCP)
', 'messages
', 'between
', 'clients
', 'and
', 'servers
', 'residing
', 'on
', 'different
', 'IP
', 'networks.
', 'Known
', 'as
', 'a
', 'DHCP
', 'relay
', 'agent
', ',
', 'a
', 'BIG-IP
', 'system
', 'with
', 'a
', 'DHCP
', 'type
', 'of
', 'virtual
', 'server
', 'listens
', 'for
', 'DHCP
', 'client
', 'messages
', 'being
', 'broadcast
', 'on
', 'the
', 'subnet
', 'and
', 'then
', 'relays
', 'those
', 'messages
', 'to
', 'the
', 'DHCP
', 'server.
', 'The
', 'DHCP
', 'server
', 'then
', 'uses
', 'the
', 'BIG-IP
', 'system
', 'to
', 'send
', 'the
', 'responses
', 'back
', 'to
', 'the
', 'DHCP
', 'client.
', 'Configuring
', 'a
', 'DHCP
', 'virtual
', 'server
', 'on
', 'the
', 'BIG-IP
', 'system
', 'relieves
', 'you
', 'of
', 'the
', 'tasks
', 'of
', 'installing
', 'and
', 'running
', 'a
', 'separate
', 'DHCP
', 'server
', 'on
', 'each
', 'subnet.
', 'Internal
', 'An
', 'internal
', 'virtual
', 'server
', 'is
', 'one
', 'that
', 'can
', 'send
', 'traffic
', 'to
', 'an
', 'intermediary
', 'server
', 'for
', 'specialized
', 'processing
', 'before
', 'the
', 'standard
', 'virtual
', 'server
', 'sends
', 'the
', 'traffic
', 'to
', 'its
', 'final
', 'destination.
', 'For
', 'example,
', 'if
', 'you
', 'want
', 'the
', 'BIG-IP
', 'system
', 'to
', 'perform
', 'content
', 'adaptation
', 'on
', 'HTTP
', 'requests
', 'or
', 'responses,
', 'you
', 'can
', 'create
', 'an
', 'internal
', 'virtual
', 'server
', 'that
', 'load
', 'balances
', 'those
', 'requests
', 'or
', 'responses
', 'to
', 'a
', 'pool
', 'of
', 'ICAP
', 'servers
', 'before
', 'sending
', 'the
', 'traffic
', 'back
', 'to
', 'the
', 'standard
', 'virtual
', 'server.
', 'An
', 'internal
', 'virtual
', 'server
', 'supports
', 'both
', 'TCP
', 'and
', 'UDP
', 'traffic.
', 'Creating
', 'a
', 'virtual
', 'server
', 'Before
', 'creating
', 'a
', 'virtual
', 'server,
', 'verify
', 'that
', 'you
', 'have
', 'created
', 'the
', 'pool
', 'to
', 'which
', 'you
', 'want
', 'this
', 'virtual
', 'server
', 'to
', 'send
', 'traffic.
', 'When
', 'you
', 'create
', 'a
', 'virtual
', 'server,
', 'you
', 'specify
', 'a
', 'destination
', 'IP
', 'address
', 'and
', 'service
', 'port.
', 'All
', 'other
', 'settings
', 'on
', 'the
', 'virtual
', 'server
', 'have
', 'default
', 'values.
', 'You
', 'can
', 'change
', 'the
', 'default
', 'values
', 'of
', 'any
', 'settings
', 'to
', 'suit
', 'your
', 'needs.
', 'On
', 'the
', 'Main
', 'tab,
', 'click
', 'Local
', 'Traffic
', '>
', 'Virtual
', 'Servers
', '.
', 'The
', 'Virtual
', 'Server
', 'List
', 'screen
', 'opens.
', 'Click
', 'the
', 'Create
', 'button.
', 'The
', 'New
', 'Virtual
', 'Server
', 'screen
', 'opens.
', 'In
', 'the
', 'Name
', 'field,
', 'type
', 'a
', 'unique
', 'name
', 'for
', 'the
', 'virtual
', 'server.
', 'In
', 'the
', 'Destination
', 'Address
', 'field,
', 'type
', 'the
', 'IP
', 'address
', 'in
', 'CIDR
', 'format.
', 'The
', 'supported
', 'format
', 'is
', 'address/prefix,
', 'where
', 'the
', 'prefix
', 'length
', 'is
', 'in
', 'bits.
', 'For
', 'example,
', 'an
', 'IPv4
', 'address/prefix
', 'is
', '10.0.0.1
', 'or
', '10.0.0.0/24
', ',
', 'and
', 'an
', 'IPv6
', 'address/prefix
', 'is
', 'ffe1::0020/64
', 'or
', '2001:ed8:77b5:2:10:10:100:42/64
', '.
', 'When
', 'you
', 'use
', 'an
', 'IPv4
', 'address
', 'without
', 'specifying
', 'a
', 'prefix,
', 'the
', 'BIG-IP
', '®
', 'system
', 'automatically
', 'uses
', 'a
', '/32
', 'prefix.
', 'Note:
', 'The
', 'IP
', 'address
', 'for
', 'this
', 'field
', 'needs
', 'to
', 'be
', 'on
', 'the
', 'same
', 'subnet
', 'as
', 'the
', 'external
', 'self-IP
', 'address.
', 'In
', 'the
', 'Service
', 'Port
', 'field,
', 'type
', 'a
', 'port
', 'number
', 'or
', 'select
', 'a
', 'service
', 'name
', 'from
', 'the
', 'Service
', 'Port
', 'list.
', 'Configure
', 'any
', 'other
', 'settings
', 'as
', 'needed.
', 'If
', 'this
', 'type
', 'of
', 'virtual
', 'server
', 'forwards
', 'traffic
', 'to
', 'a
', 'pool,
', 'then
', 'in
', 'the
', 'Resources
', 'area
', 'of
', 'the
', 'screen,
', 'from
', 'the
', 'Default
', 'Pool
', 'list,
', 'select
', 'the
', 'relevant
', 'pool
', 'name.
', 'After
', 'performing
', 'this
', 'task,
', 'you
', 'have
', 'a
', 'virtual
', 'server
', 'that
', 'listens
', 'for
', 'application
', 'traffic
', 'and
', 'acts
', 'according
', 'to
', 'the
', 'values
', 'configured
', 'within
', 'the
', 'virtual
', 'server.
', 'About
', 'the
', 'destination
', 'address
', 'When
', 'creating
', 'a
', 'virtual
', 'server,
', 'you
', 'must
', 'specify
', 'a
', 'destination
', 'address.
', 'You
', 'can
', 'specify
', 'either
', 'a
', 'host
', 'address
', 'or
', 'a
', 'network
', 'address,
', 'in
', 'either
', 'IPv4
', 'or
', 'IPv6
', 'format:
', 'With
', 'a
', 'host
', 'address,
', 'a
', 'virtual
', 'server
', 'can
', 'listen
', 'for
', 'client
', 'connections
', 'that
', 'are
', 'destined
', 'for
', 'the
', 'host
', 'address
', 'and
', 'then
', 'direct
', 'them
', 'to
', 'a
', 'server
', 'in
', 'a
', 'server
', 'pool.
', 'If
', 'you
', 'do
', 'not
', 'append
', 'a
', 'prefix
', '(in
', 'CIDR
', 'notation)
', 'to
', 'a
', 'host
', 'address,
', 'the
', 'default
', 'prefix
', 'is
', '/32
', '.
', 'With
', 'a
', 'network
', 'address
', '(specifically,
', 'an
', 'address
', 'whose
', 'host
', 'bit
', 'is
', 'set
', 'to
', '0),
', 'a
', 'virtual
', 'server
', 'can
', 'direct
', 'client
', 'connections
', 'that
', 'are
', 'destined
', 'for
', 'an
', 'entire
', 'range
', 'of
', 'IP
', 'addresses,
', 'rather
', 'than
', 'for
', 'a
', 'single
', 'destination
', 'IP
', 'address.
', 'For
', 'example,
', 'the
', 'virtual
', 'server
', 'can
', 'direct
', 'client
', 'traffic
', 'that
', 'is
', 'destined
', 'for
', 'any
', 'of
', 'the
', 'nodes
', 'on
', 'the
', '192.168.1.0
', 'network
', 'to
', 'a
', 'specific
', 'pool
', 'such
', 'as
', 'ingress-firewalls
', '.
', 'Or,
', 'a
', 'virtual
', 'server
', 'can
', 'direct
', 'a
', 'web
', 'connection
', 'destined
', 'to
', 'any
', 'address
', 'within
', 'the
', 'subnet
', '192.168.1.0/24
', ',
', 'to
', 'the
', 'pool
', 'default_webservers
', '.
', 'If
', 'you
', 'do
', 'not
', 'append
', 'a
', 'prefix
', '(in
', 'CIDR
', 'notation)
', 'to
', 'a
', 'network
', 'address,
', 'the
', 'default
', 'prefix
', 'is
', '/24
', '.
', 'About
', 'wildcard
', 'servers
', 'Besides
', 'directing
', 'client
', 'connections
', 'that
', 'are
', 'destined
', 'for
', 'a
', 'specific
', 'network
', 'or
', 'subnet,
', 'a
', 'virtual
', 'server
', 'can
', 'also
', 'direct
', 'client
', 'connections
', 'that
', 'have
', 'a
', 'specific
', 'destination
', 'IP
', 'address
', 'that
', 'the
', 'virtual
', 'server
', 'does
', 'not
', 'recognize,
', 'such
', 'as
', 'a
', 'transparent
', 'device.
', 'This
', 'type
', 'of
', 'virtual
', 'server
', 'is
', 'known
', 'as
', 'a
', 'wildcard
', 'virtual
', 'server.
', 'Examples
', 'of
', 'transparent
', 'devices
', 'are
', 'firewalls,
', 'routers,
', 'proxy
', 'servers,
', 'and
', 'cache
', 'servers.
', 'Wildcard
', 'virtual
', 'servers
', 'are
', 'a
', 'special
', 'type
', 'of
', 'virtual
', 'server
', 'that
', 'have
', 'a
', 'network
', 'IP
', 'address
', 'as
', 'the
', 'specified
', 'destination
', 'address
', 'instead
', 'of
', 'a
', 'host
', 'IP
', 'address.
', 'When
', 'the
', 'BIG-IP
', '®
', 'system
', 'does
', 'not
', 'find
', 'a
', 'specific
', 'virtual
', 'server
', 'that
', 'matches
', 'a
', 'client’s
', 'destination
', 'IP
', 'address,
', 'the
', 'BIG-IP
', 'system
', 'matches
', 'the
', 'client’s
', 'destination
', 'IP
', 'address
', 'to
', 'a
', 'wildcard
', 'virtual
', 'server,
', 'designated
', 'by
', 'an
', 'IP
', 'address
', 'of
', '0.0.0.0
', '.
', 'The
', 'BIG-IP
', 'system
', 'then
', 'forwards
', 'the
', 'client’s
', 'packet
', 'to
', 'one
', 'of
', 'the
', 'firewalls
', 'or
', 'routers
', 'assigned
', 'to
', 'that
', 'virtual
', 'server.
', 'Wildcardvirtual
', 'servers
', 'do
', 'not
', 'translate
', 'the
', 'destination
', 'IP
', 'address
', 'of
', 'the
', 'incoming
', 'packet.
', 'Default
', 'and
', 'port-specific
', 'wildcard
', 'virtual
', 'servers
', 'There
', 'are
', 'two
', 'kinds
', 'of
', 'wildcard
', 'virtual
', 'servers
', 'that
', 'you
', 'can
', 'create:
', 'Default
', 'wildcard
', 'virtual
', 'servers
', 'A
', 'default
', 'wildcard
', 'virtual
', 'server
', 'is
', 'a
', 'wildcard
', 'virtual
', 'server
', 'that
', 'uses
', 'port
', '0
', 'and
', 'handles
', 'traffic
', 'for
', 'all
', 'services.
', 'A
', 'wildcard
', 'virtual
', 'server
', 'allows
', 'traffic
', 'from
', 'all
', 'external
', 'VLANs
', 'by
', 'default.
', 'However,
', 'you
', 'can
', 'specifically
', 'disable
', 'any
', 'VLANs
', 'that
', 'you
', 'do
', 'not
', 'want
', 'the
', 'default
', 'wildcard
', 'virtual
', 'server
', 'to
', 'support.
', 'Disabling
', 'VLANs
', 'for
', 'the
', 'default
', 'wildcard
', 'virtual
', 'server
', 'is
', 'done
', 'by
', 'creating
', 'a
', 'VLAN
', 'disabled
', 'list.
', 'Note
', 'that
', 'a
', 'VLAN
', 'disabled
', 'list
', 'applies
', 'to
', 'default
', 'wildcard
', 'virtual
', 'servers
', 'only.
', 'You
', 'cannot
', 'create
', 'a
', 'VLAN
', 'disabled
', 'list
', 'for
', 'a
', 'wildcard
', 'virtual
', 'server
', 'that
', 'is
', 'associated
', 'with
', 'one
', 'VLAN
', 'only.
', 'Port-specific
', 'wildcard
', 'virtual
', 'servers
', 'A
', 'port-specific
', 'wildcard
', 'virtual
', 'server
', 'handles
', 'traffic
', 'for
', 'a
', 'particular
', 'service
', 'only,
', 'and
', 'you
', 'define
', 'the
', 'virtual
', 'server
', 'using
', 'a
', 'service
', 'name
', 'or
', 'a
', 'port
', 'number.
', 'You
', 'can
', 'use
', 'port-specific
', 'wildcard
', 'virtual
', 'servers
', 'for
', 'tracking
', 'statistics
', 'for
', 'a
', 'particular
', 'type
', 'of
', 'network
', 'traffic,
', 'or
', 'for
', 'routing
', 'outgoing
', 'traffic,
', 'such
', 'as
', 'HTTP
', '
traffic,
', 'directly
', 'to
', 'a
', 'cache
', 'server
', 'rather
', 'than
', 'a
', 'firewall
', 'or
', 'router.
', 'If
', 'you
', 'use
', 'both
', 'a
', 'default
', 'wildcard
', 'virtual
', 'server
', 'and
', 'port-specific
', 'wildcard
', 'virtual
', 'servers,
', 'any
', 'traffic
', 'that
', 'does
', 'not
', 'match
', 'either
', 'a
', 'standard
', 'virtual
', 'server
', 'or
', 'one
', 'of
', 'the
', 'port-specific
', 'wildcard
', 'virtual
', 'servers
', 'is
', 'handled
', 'by
', 'the
', 'default
', 'wildcard
', 'virtual
', 'server.
', 'F5
', 'Networks
', 'recommends
', 'that
', 'when
', 'you
', 'define
', 'transparent
', 'nodes
', 'that
', 'need
', 'to
', 'handle
', 'more
', 'than
', 'one
', 'type
', 'of
', 'service,
', 'such
', 'as
', 'a
', 'firewall
', 'or
', 'a
', 'router,
', 'you
', 'specify
', 'an
', 'actual
', 'port
', 'for
', 'the
', 'node
', 'and
', 'turn
', 'off
', 'port
', 'translation
', 'for
', 'the
', 'virtual
', 'server.
', 'About
', 'multiple
', 'wildcard
', 'servers
', 'You
', 'can
', 'define
', 'multiple
', 'wildcard
', 'virtual
', 'servers
', 'that
', 'run
', 'simultaneously.
', 'Each
', 'wildcard
', 'virtual
', 'server
', 'must
', 'be
', 'assigned
', 'to
', 'an
', 'individual
', 'VLAN,
', 'and
', 'therefore
', 'accepts
', 'packets
', 'from
', 'that
', 'VLAN
', 'only.
', 'In
', 'some
', 'configurations,
', 'you
', 'need
', 'to
', 'set
', 'up
', 'a
', 'wildcard
', 'virtual
', 'server
', 'on
', 'one
', 'side
', 'of
', 'the
', 'BIG-IP
', 'system
', 'to
', 'distribute
', 'connections
', 'across
', 'transparent
', 'devices.
', 'You
', 'can
', 'create
', 'another
', 'wildcard
', 'virtual
', 'server
', 'on
', 'the
', 'other
', 'side
', 'of
', 'the
', 'BIG-IP
', 'system
', 'to
', 'forward
', 'packets
', 'to
', 'virtual
', 'servers
', 'receiving
', 'connections
', 'from
', 'the
', 'transparent
', 'devices
', 'and
', 'forwarding
', 'them
', 'to
', 'their
', 'destination.
', 'About
', 'virtual
', 'addresses
', 'A
', 'virtual
', 'address
', 'is
', 'the
', 'specific
', 'node
', 'or
', 'network
', 'IP
', 'address
', 'with
', 'which
', 'you
', 'associate
', 'a
', 'virtual
', 'server.
', 'For
', 'example,
', 'if
', 'a
', 'virtual
', "server's
", 'destination
', 'address
', 'and
', 'service
', 'port
', 'are
', '192.168.20.10:80
', ',
', 'then
', 'the
', 'IP
', 'address
', '192.168.20.10
', 'is
', 'a
', 'virtual
', 'address.
', 'You
', 'can
', 'create
', 'a
', 'many-to-one
', 'relationship
', 'between
', 'virtual
', 'servers
', 'and
', 'a
', 'virtual
', 'address.
', 'For
', 'example,
', 'you
', 'can
', 'create
', 'the
', 'three
', 'virtual
', 'servers
', '192.168.20.10:80
', ',
', '192.168.20.10:443
', ',
', 'and
', '192.168.20.10:161
', 'for
', 'the
', 'same
', 'virtual
', 'address,
', '192.168.20.10
', '.
', 'You
', 'cannot
', 'explicitly
', 'create
', 'a
', 'virtual
', 'address;
', 'the
', 'BIG-IP
', 'system
', 'creates
', 'a
', 'virtual
', 'address
', 'whenever
', 'you
', 'create
', 'a
', 'virtual
', 'server,
', 'if
', 'the
', 'virtual
', 'address
', 'has
', 'not
', 'already
', 'been
', 'created.
', 'However,
', 'you
', 'can
', 'modify
', 'the
', 'properties
', 'of
', 'a
', 'virtual
', 'address,
', 'and
', 'you
', 'can
', 'enable
', 'and
', 'disable
', 'a
', 'virtual
', 'address.
', 'When
', 'you
', 'disable
', 'a
', 'virtual
', 'address,
', 'none
', 'of
', 'the
', 'virtual
', 'servers
', 'associated
', 'with
', 'that
', 'address
', 'can
', 'receive
', 'incoming
', 'network
', 'traffic.
', 'When
', 'you
', 'create
', 'a
', 'virtual
', 'server,
', 'BIG-IP
', '®
', 'internally
', 'associates
', 'the
', 'virtual
', 'address
', 'with
', 'a
', 'MAC
', 'address.
', 'This
', 'in
', 'turn
', 'causes
', 'the
', 'BIG-IP
', '®
', 'system
', 'to
', 'respond
', 'to
', 'Address
', 'Resolution
', 'Protocol
', '(ARP)
', 'requests
', 'for
', 'the
', 'virtual
', 'address,
', 'and
', 'to
', 'send
', 'gratuitous
', 'ARP
', 'requests
', 'and
', 'responses
', 'with
', 'respect
', 'to
', 'the
', 'virtual
', 'address.
', 'As
', 'an
', 'option,
', 'you
', 'can
', 'disable
', 'ARP
', 'activity
', 'for
', 'virtual
', 'addresses,
', 'in
', 'the
', 'rare
', 'case
', 'that
', 'ARP
', 'activity
', 'affects
', 'system
', 'performance.
', 'This
', 'most
', 'likely
', 'occurs
', 'only
', 'when
', 'you
', 'have
', 'a
', 'large
', 'number
', 'of
', 'virtual
', 'addresses
', 'defined
', 'on
', 'the
', 'system.
', 'About
', 'virtual
', 'address
', 'creation
', 'You
', 'create
', 'a
', 'virtual
', 'address
', 'indirectly
', 'when
', 'you
', 'create
', 'the
', 'first
', 'virtual
', 'server
', 'with
', 'a
', 'destination
', 'address
', 'that
', 'includes
', 'the
', 'virtual
', 'address.
', 'You
', 'do
', 'not
', 'explicitly
', 'create
', 'a
', 'virtual
', 'address.
', 'For
', 'example,
', 'if
', 'you
', 'create
', 'a
', 'virtual
', 'server
', 'with
', 'a
', 'destination
', 'address
', 'of
', '192.168.30.22:80
', ',
', 'the
', 'BIG-IP
', '®
', 'system
', 'automatically
', 'creates
', 'the
', 'virtual
', 'address
', '192.168.30.22
', '.
', 'Viewing
', 'virtual
', 'address
', 'properties
', 'Using
', 'the
', 'BIG-IP™
', 'Configuration
', 'utility,
', 'you
', 'can
', 'view
', 'the
', 'properties
', 'of
', 'an
', 'existing
', 'virtual
', 'address
', 'on
', 'the
', 'BIG-IP
', 'system.
', 'On
', 'the
', 'Main
', 'tab,
', 'click
', 'Local
', 'Traffic
', '>
', 'Virtual
', 'Servers
', '.
', 'The
', 'Virtual
', 'Server
', 'List
', 'screen
', 'displays
', 'a
', 'list
', 'of
', 'existing
', 'virtual
', 'servers.
', 'On
', 'the
', 'menu
', 'bar,
', 'click
', 'Virtual
', 'Address
', 'List
', '.
', 'This
', 'displays
', 'the
', 'list
', 'of
', 'virtual
', 'addresses.
', 'In
', 'the
', 'Name
', 'column,
', 'click
', 'the
', 'name
', 'of
', 'the
', 'relevant
', 'virtual
', 'address.
', 'This
', 'displays
', 'the
', 'properties
', 'of
', 'the
', 'virtual
', 'address.
', 'Click
', 'the
', 'Cancel
', 'button.
', 'Modifying
', 'a
', 'virtual
', 'address
', 'You
', 'can
', 'modify
', 'the
', 'properties
', 'of
', 'a
', 'virtual
', 'address.
', 'For
', 'example,
', 'you
', 'might
', 'want
', 'to
', 'assign
', 'a
', 'virtual
', 'address
', 'to
', 'a
', 'different
', 'traffic
', 'group,
', 'or
', 'change
', 'the
', 'conditions
', 'under
', 'which
', 'the
', 'system
', 'advertises
', 'the
', 'virtual
', 'address
', 'to
', 'dynamic
', 'routing
', 'protocols.
', 'On
', 'the
', 'Main
', 'tab,
', 'click
', 'Local
', 'Traffic
', '>
', 'Virtual
', 'Servers
', '>
', 'Virtual
', 'Address
', 'List
', '.
', 'The
', 'Virtual
', 'Address
', 'List
', 'screen
', 'opens.
', 'In
', 'the
', 'Name
', 'column,
', 'click
', 'the
', 'virtual
', 'address
', 'that
', 'you
', 'want
', 'to
', 'modify.
', 'This
', 'displays
', 'the
', 'properties
', 'of
', 'that
', 'virtual
', 'address.
', 'Modify
', 'any
', 'property
', 'values
', 'as
', 'needed.
', 'Click
', 'Update
', '.
', 'Virtual
', 'address
', 'settings
', 'Lists
', 'and
', 'describes
', 'the
', 'configuration
', 'settings
', 'of
', 'a
', 'virtual
', 'address.
', 'Property
', 'Description
', 'Default
', 'Value
', 'Name
', 'The
', 'name
', 'that
', 'you
', 'assign
', 'to
', 'the
', 'virtual
', 'address.
', 'This
', 'name
', 'can
', 'match
', 'the
', 'virtual
', 'IP
', 'address
', 'itself.
', 'No
', 'default
', 'value
', 'Partition
', '/
', 'Path
', 'The
', 'pathname
', 'indicating
', 'the
', 'partition/folder
', 'in
', 'which
', 'the
', 'virtual
', 'address
', 'resides.
', '/Common
', 'Address
', 'The
', 'IP
', 'address
', 'of
', 'the
', 'virtual
', 'server,
', 'excluding
', 'the
', 'service.
', 'No
', 'default
', 'value
', 'Traffic
', 'Group
', 'The
', 'traffic
', 'group
', 'that
', 'contains
', 'this
', 'virtual
', 'IP
', 'address.
', 'traffic-group-1
', 'or
', 'traffic-group-local-only
', 'Availability
', 'The
', 'availability
', 'of
', 'the
', 'virtual
', 'address
', 'with
', 'respect
', 'to
', 'service
', 'checking.
', 'No
', 'default
', 'value
', 'State
', 'The
', 'state
', 'of
', 'the
', 'virtual
', 'address,
', 'that
', 'is,
', 'enabled
', 'or
', 'disabled
', '.
', 'Enabled
', 'Auto
', 'Delete
', 'A
', 'directive
', 'that
', 'the
', 'system
', 'should
', 'automatically
', 'delete
', 'the
', 'virtual
', 'address
', 'with
', 'the
', 'deletion
', 'of
', 'the
', 'last
', 'associated
', 'virtual
', 'server.
', 'When
', 'cleared
', '(disabled),
', 'this
', 'setting
', 'specifies
', 'that
', 'the
', 'system
', 'should
', 'retain
', 'the
', 'virtual
', 'address
', 'even
', 'when
', 'all
', 'associated
', 'virtual
', 'servers
', 'have
', 'been
', 'deleted.
', 'Enabled
', 'Advertise
', 'Route
', 'The
', 'virtual-server
', 'conditions
', 'for
', 'which
', 'the
', 'BIG-IP
', 'system
', 'should
', 'advertise
', 'this
', 'virtual
', 'address
', 'to
', 'an
', 'advanced
', 'routing
', 'module.
', 'This
', 'setting
', 'only
', 'applies
', 'when
', 'the
', 'Route
', 'Advertisement
', 'setting
', 'is
', 'enabled
', '(checked).
', 'Possible
', 'values
', 'are:
', 'When
', 'any
', 'virtual
', 'server
', 'is
', 'available
', 'When
', 'all
', 'virtual
', 'server(s)
', 'are
', 'available
', 'Always
', 'When
', 'any
', 'virtual
', 'server
', 'is
', 'available
', 'Connection
', 'Limit
', 'The
', 'number
', 'of
', 'concurrent
', 'connections
', 'that
', 'the
', 'BIG-IP
', 'system
', 'allows
', 'on
', 'this
', 'virtual
', 'address.
', '0
', 'ARP
', 'A
', 'setting
', 'that
', 'enables
', 'or
', 'disables
', 'ARP
', 'requests
', 'for
', 'the
', 'virtual
', 'address.
', 'When
', 'this
', 'setting
', 'is
', 'disabled,
', 'the
', 'BIG-IP
', 'system
', 'ignores
', 'ARP
', 'requests
', 'that
', 'other
', 'routers
', 'send
', 'for
', 'this
', 'virtual
', 'address.
', 'Enabled
', '(checked)
', 'ICMP
', 'Echo
', 'A
', 'setting
', 'that
', 'enables,
', 'selectively
', 'enables,
', 'or
', 'disables
', 'responses
', 'to
', 'ICMP
', 'echo
', 'requests
', 'on
', 'a
', 'per-virtual
', 'address
', 'basis.
', 'When
', 'this
', 'setting
', 'is
', 'disabled,
', 'the
', 'BIG-IP
', 'system
', 'drops
', 'any
', 'ICMP
', 'echo
', 'request
', 'packets
', 'sent
', 'to
', 'virtual
', 'addresses,
', 'including
', 'standard
', 'statistics
', 'and
', 'logging.
', 'Note
', 'that
', 'the
', 'resulting
', 'behavior
', 'is
', 'affected
', 'by
', 'the
', 'value
', 'you
', 'configure
', 'for
', 'the
', 'Advertise
', 'Route
', 'setting.
', 'Enabled
', 'Route
', 'Advertisement
', 'A
', 'setting
', 'that
', 'inserts
', 'a
', 'route
', 'to
', 'this
', 'virtual
', 'address
', 'into
', 'the
', 'kernel
', 'routing
', 'table
', 'so
', 'that
', 'an
', 'advanced
', 'routing
', 'module
', 'can
', 'redistribute
', 'that
', 'route
', 'to
', 'other
', 'routers
', 'on
', 'the
', 'network.
', 'Enabled
', '(checked)
', 'About
', 'virtual
', 'servers
', 'and
', 'route
', 'domain
', 'IDs
', 'Whenever
', 'you
', 'configure
', 'the
', 'Source
', 'Address
', 'and
', 'Destination
', 'Address
', 'settings
', 'on
', 'a
', 'virtual
', 'server,
', 'the
', 'BIG-IP
', 'system
', 'requires
', 'that
', 'the
', 'route
', 'domain
', 'IDs
', 'match,
', 'if
', 'route
', 'domain
', 'IDs
', 'are
', 'specified.
', 'To
', 'ensure
', 'that
', 'this
', 'requirement
', 'is
', 'met,
', 'the
', 'BIG-IP
', 'system
', 'enforces
', 'specific
', 'rules,
', 'which
', 'vary
', 'depending
', 'on
', 'whether
', 'you
', 'are
', 'modifying
', 'an
', 'existing
', 'virtual
', 'server
', 'or
', 'creating
', 'a
', 'new
', 'virtual
', 'server.
', 'Table
', '2.
', 'Modifying
', 'an
', 'existing
', 'virtual
', 'server
', 'User
', 'action
', 'Result
', 'In
', 'the
', 'destination
', 'address,
', 'you
', 'change
', 'an
', 'existing
', 'route
', 'domain
', 'ID.
', 'The
', 'system
', 'automatically
', 'changes
', 'the
', 'route
', 'domain
', 'ID
', 'on
', 'the
', 'source
', 'address
', 'to
', 'match
', 'the
', 'new
', 'destination
', 'route
', 'domain
', 'ID.
', 'In
', 'the
', 'source
', 'address,
', 'you
', 'change
', 'an
', 'existing
', 'route
', 'domain
', 'ID.
', 'If
', 'the
', 'new
', 'route
', 'domain
', 'ID
', 'does
', 'not
', 'match
', 'the
', 'route
', 'domain
', 'ID
', 'in
', 'the
', 'destination
', 'address,
', 'the
', 'system
', 'displays
', 'an
', 'error
', 'message
', 'stating
', 'that
', 'the
', 'two
', 'route
', 'domain
', 'IDs
', 'must
', 'match.
', 'Table
', '3.
', 'Creating
', 'a
', 'new
', 'virtual
', 'server
', 'User
', 'action
', 'Result
', 'You
', 'specify
', 'a
', 'destination
', 'IP
', 'address
', 'only,with
', 'a
', 'route
', 'domain
', 'ID,
', 'and
', 'do
', 'not
', 'specify
', 'a
', 'source
', 'IP
', 'address.
', 'The
', 'source
', 'IP
', 'address
', 'defaults
', 'to
', '0.0.0.0
', 'and
', 'inherits
', 'the
', 'route
', 'domain
', 'ID
', 'from
', 'the
', 'destination
', 'IP
', 'address.
', 'You
', 'specify
', 'both
', 'source
', 'and
', 'destination
', 'addresses
', 'but
', 'no
', 'route
', 'domain
', 'IDs.
', 'The
', 'BIG-IP
', 'system
', 'uses
', 'the
', 'default
', 'route
', 'domain.
', 'You
', 'specify
', 'both
', 'source
', 'and
', 'destination
', 'addresses
', 'and
', 'a
', 'route
', 'domain
', 'ID
', 'on
', 'each
', 'of
', 'the
', 'IP
', 'addresses.
', 'The
', 'BIG-IP
', 'system
', 'verifies
', 'that
', 'both
', 'route
', 'domain
', 'IDs
', 'match.
', 'Otherwise,
', 'the
', 'system
', 'displays
', 'an
', 'error
', 'message.
', 'You
', 'specify
', 'both
', 'source
', 'and
', 'destination
', 'addresses
', 'and
', 'a
', 'route
', 'domain
', 'ID
', 'on
', 'one
', 'of
', 'the
', 'addresses,
', 'but
', 'exclude
', 'an
', 'ID
', 'from
', 'the
', 'other
', 'address.
', 'The
', 'system
', 'verifies
', 'that
', 'the
', 'specified
', 'route
', 'domain
', 'ID
', 'matches
', 'the
', 'ID
', 'of
', 'the
', 'default
', 'route
', 'domain.
', 'Specifically,
', 'when
', 'one
', 'address
', 'lacks
', 'an
', 'ID,
', 'the
', 'only
', 'valid
', 'configuration
', 'is
', 'one
', 'in
', 'which
', 'the
', 'ID
', 'specified
', 'on
', 'the
', 'other
', 'address
', 'is
', 'the
', 'ID
', 'of
', 'a
', 'default
', 'route
', 'domain.
', 'Otherwise,
', 'the
', 'system
', 'displays
', 'an
', 'error
', 'message.
', 'About
', 'virtual
', 'server
', 'and
', 'virtual
', 'address
', 'status
', 'At
', 'any
', 'time,
', 'you
', 'can
', 'determine
', 'the
', 'status
', 'of
', 'a
', 'virtual
', 'server
', 'or
', 'virtual
', 'address,
', 'using
', 'the
', 'BIG-IP
', '®
', 'Configuration
', 'utility.
', 'You
', 'can
', 'find
', 'this
', 'information
', 'by
', 'displaying
', 'the
', 'list
', 'of
', 'virtual
', 'servers
', 'or
', 'virtual
', 'addresses
', 'and
', 'viewing
', 'the
', 'Status
', 'column,
', 'or
', 'by
', 'viewing
', 'the
', 'Availability
', 'property
', 'of
', 'the
', 'object.
', 'The
', 'BIG-IP
', 'Configuration
', 'utility
', 'indicates
', 'status
', 'by
', 'displaying
', 'one
', 'of
', 'several
', 'icons,
', 'distinguished
', 'by
', 'shape
', 'and
', 'color:
', 'The
', 'shape
', 'of
', 'the
', 'icon
', 'indicates
', 'the
', 'status
', 'that
', 'the
', 'monitor
', 'has
', 'reported
', 'for
', 'that
', 'node.
', 'The
', 'color
', 'of
', 'the
', 'icon
', 'indicates
', 'the
', 'actual
', 'status
', 'of
', 'the
', 'node.
', 'About
', 'clustered
', 'multiprocessing
', 'The
', 'BIG-IP
', '®
', 'system
', 'includes
', 'a
', 'performance
', 'feature
', 'known
', 'as
', 'Clustered
', 'Multiprocessing™,
', 'or
', 'CMP
', '®
', '.
', 'CMP
', 'is
', 'a
', 'traffic
', 'acceleration
', 'feature
', 'that
', 'creates
', 'a
', 'separate
', 'instance
', 'of
', 'the
', 'Traffic
', 'Management
', 'Microkernel
', '(TMM)
', 'service
', 'for
', 'each
', 'central
', 'processing
', 'unit
', '(CPU)
', 'on
', 'the
', 'system.
', 'When
', 'CMP
', 'is
', 'enabled,
', 'the
', 'workload
', 'is
', 'shared
', 'equally
', 'among
', 'all
', 'CPUs.
', 'Whenever
', 'you
', 'create
', 'a
', 'virtual
', 'server,
', 'the
', 'BIG-IP
', 'system
', 'automatically
', 'enables
', 'the
', 'CMP
', 'feature.
', 'When
', 'CMP
', 'is
', 'enabled,
', 'all
', 'instances
', 'of
', 'the
', 'TMM
', 'service
', 'process
', 'application
', 'traffic.
', 'When
', 'you
', 'view
', 'standard
', 'performance
', 'graphs
', 'using
', 'the
', 'BIG-IP
', 'Configuration
', 'utility,
', 'you
', 'can
', 'see
', 'multiple
', 'instances
', 'of
', 'the
', 'TMM
', 'service
', '(
', 'tmm0
', ',
', 'tmm1
', ',
', 'and
', 'so
', 'on).
', 'When
', 'CMP
', 'is
', 'enabled,
', 'be
', 'aware
', 'that:
', 'While
', 'displaying
', 'some
', 'statistics
', 'individually
', 'for
', 'each
', 'TMM
', 'instance,
', 'the
', 'BIG-IP
', 'system
', 'displays
', 'other
', 'statistics
', 'as
', 'the
', 'combined
', 'total
', 'of
', 'all
', 'TMM
', 'instances.
', 'Connection
', 'limits
', 'for
', 'a
', 'virtual
', 'server
', 'with
', 'CMP
', 'enabled
', 'are
', 'distributed
', 'evenly
', 'across
', 'all
', 'instances
', 'of
', 'the
', 'TMM
', 'service.
', 'Note:
', 'F5
', 'recommends
', 'that
', 'you
', 'disable
', 'the
', 'CMP
', 'feature
', 'if
', 'you
', 'set
', 'a
', 'small
', 'connection
', 'limit
', 'on
', 'pool
', 'members
', '(for
', 'example,
', 'a
', 'connection
', 'limit
', 'of
', '2
', 'for
', 'the
', '8400
', 'platform
', 'or
', '4
', 'for
', 'the
', '8800
', 'platform).
', 'You
', 'can
', 'enable
', 'or
', 'disable
', 'CMP
', 'for
', 'a
', 'virtual
', 'server,
', 'or
', 'you
', 'can
', 'enable
', 'CMP
', 'for
', 'a
', 'specific
', 'CPU.
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