H3C Technologies H3C S12500-X Series Switches - Manual (Page 91)

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Figure 26 Distribution process
The distribution process is as follows:
1. The manager switch obtains the status of each managed switch through an ACA request, which
carries the fabric-wide list of domain IDs (addresses of all switches in the fabric) known to the
manager switch. After sending the ACA request, the manager switch enters the locked state. After
receiving the ACA request, a managed switch compares its list of domain IDs with that in the
packet. If they are consistent, the fabric is in stable state [1] . In this case, the managed switch is
prepared for synchronization, replies with an ACC (acknowledgement) packet, and enters the
change authorization state (locked). If the managed switch has been in change authorization state
or cannot process the ACA request for some reason, it replies with an RJT (reject) packet.
2. The manager switch starts data synchronization by sending an SFC request only after receiving
ACC requests from all managed switches. Otherwise, it notifies managed switches to release the
change authorization state by sending an RCA request [2] .
3. The manager switch sends an SFC request to all managed switches. The SFC request carries data
to be synchronized, including the active zone set and zone database information. After receiving
the SFC request with zone database information, the managed switch determines whether the total
number of zones, zone sets, and zone aliases exceeds the limit after its local zone database is
replaced. If not, it replies with an ACC packet. Otherwise, it replies with an RJT packet.
4. The manager switch notifies managed switches by sending a UFC request to replace their local
data with the received data only after receiving ACC packets from all managed switches.
Otherwise, it notifies managed switches to release the change authorization state by sending an
RCA request.
5. After receiving the UFC request, the managed switch updates its local zone database. It replies
with an ACC packet for a successful update and with an RJT packet for a failed update.
6. The manager switch notifies managed switches by sending an RCA request to release the change
authorization state after receiving ACC packets from all managed switches.