During a configuration synchronization (ConfigSync) procedure, BIG-IP elements that are not synced amongst device group members are discussed in this post.
ConfigSync is a HA feature that synchronizes configuration changes between BIG-IP devices in a device group. This feature guarantees that all members of a BIG-IP device group have the same configuration data and work together to handle application traffic efficiently.
Items that are not synced across device group members during a ConfigSync transaction are listed below:
BIG-IP objects that are not synchronized
Class of Service
Connection mirroring port, VLAN, and IP address
Hypervisor VLAN members
Hypervisor management network
Hypervisor vCMP capacity
Installed software image, status, volumes, and hotfixes
Route domains (eviction policy assignment is synchronized)
ZebOS routing configuration
Flow eviction policy setting for route domains Note: Beginning in BIG-IP 12.0.0, the flow-eviction-policy setting is synchronized; prior to BIG-IP 12.0.0, that setting is not synchronized.
Static ARP entries
System certificates and keys
VCMP virtual disks
The Show Security Banner on the Login Screen message (System > Preferences)
BIG-IP attributes that are not synchronized
Analytics Reports – Sent information, status, and messages
Device failover state
Device group member State, commit ID, and Last sync CID
Nodes – Monitor status and logs
Pool Members – Status and logs
Trust domain, certificate, key, CA bundle, and status
Unicast IP address and port
Virtual Address status
SNMP Agent Contact Information and Machine Location
A good example is setting up a new VLAN and Self Service IP. These do not get Synched, so you have to jump over to the PASSIVE F5 and configure them. You have to make sure you use a unique IP for the Self IP Address and not the same one you have on the ACTIVE.