User's Manual

79-5
cannot connect together physically. Therefore, one stracking will divide into two stracking. This process is
called split.
Figure 83-5: Splitting of tacking
(6) Priority of member
Priority of member is the member facilities attribute, mainly use for the role selection for confirming the
role of each members. If the facility has higher the priority, it will have higher chance to become the
Master. The default setting of the facilities is 1. If the user want to pre-set particular facility become the
Master, he can increase the priority value of that facility manually before build up the VSF.
79.1.3 Glossary
VSF is the short form of the Virtual Switching Framework.
VSF Port: VSF port, is a mode on port-channel
VSF AM: the master card of the VSF activities
VSF SM: the backup master card of the VSF activities
VSF Slave: the slave card of VSF, to operate the VSF agreement ,during the switching it means Chassis
AM，the not selecte one is VSF AM or VSF SM
VSF Member: the member facilities of VSF
VSF Master Member: the master member facility of VSF
VSF Standby Master Member: the standby master member facility of VSF
VSF Slave Member: the slave member facilities of VSF
HA: High Availability
AM: Active Master, activities controller. It is the switch whose working mode is Master is and it is in the
operation status, each of the cassette vsf group can only has a AM at each time.
SM
：
Standby Master, the working mode in the cassette vsf group is Master and it locates in the standby
status.
SSO: Stateful Switchove, the data of in-phase agreement layer will occour the switchover, the backup
master agreement apply function which can connect to corresponding function fleetly. The data of
this function will not be lose, but the router agreement data is not in-phase
NSF: None Stop Forwarding. Using the independent management characteristics of data layer control,
data layer can still transmit data normally as the control layer is out of order
NSF/SSO: Nonstop Forwarding with Stateful Switchover means that undergo the SSO “master-backup
interchange”, the data transmit is not affected
Syn process
：
HA synchronization processes responsable for activities control and backup agreement
function collection or distribution and data synchronization communication.