User's Manual

Configuration Guide of XGS-5240-Series
74-6
Fig 1-5 Splitting of tacking
(6) Priority of member
Priority of member is the member facilities attribute, mainly use for the role selection for confirmi
ng the role of each members. If the facility has higher the priority, it will have higher chance to beco
me the Master. The default setting of the facilities is 1. If the user want to pre-set particular facility b
ecome the Master, he can increase the priority value of that facility manually before build up the VSF.
74.1.3 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 i
s 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 ba
ckup 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 co
ntrol, 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-ba
ckup interchange”, the data transmit is not affected
Syn process
：
HA synchronization processes responsable for activities control and backup agreem
ent function collection or distribution and data synchronization communication.
GR: Graceful restart. In order to transmitting uninterruptedly, require the router confer to extend t
o support the GR ability.
MAD: Multi-Active Detection
74.1.4 VSF Typical Application