H3C Technologies H3C S10500 Series Switches - Manual (Page 88)

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If the managed switch replies with neither an ACC packet nor an RJT packet because of its
abnormal state, the manager switch cannot release its locked state. To prevent this situation, the
manager switch transmits an ACA request up to three times.
{
If no reply is received, the manager switch releases its locked state.
{
If the manager switch becomes abnormal after sending an ACA request, the managed switch
will be in locked state and cannot receive subsequent packets. In this situation, the managed
switch releases its locked state after waiting for a period of time.
4. 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, the managed switch calculates the total numbers of zones, zone sets, and zone
aliases if its local zone database is replaced.
{
If none of the total numbers exceed the limit, the managed switch replies with an ACC packet.
{
If any of the total numbers exceed the limit, the managed switch replies with an RJT packet.
{
After receiving ACC packets from all managed switches, the manager switch sends a UFC
request to the managed switches. The UFC request notifies the managed switches to replace
their local data with the received data. Otherwise, the manager switch sends an RCA request
to notify managed switches to release the change authorization state.
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.
7. After receiving the RCA request, the managed switch releases its change authorization state and
replies with an ACC packet.
8. The manager switch releases its change authorization state after receiving ACC packets from all
managed switches.
Zone distribution in enhanced zoning mode
Enhanced zoning has the following differences from basic zoning in zone distribution:
• Enhanced zoning distributes the zone policy and hard zoning status in addition to the active zone
set and zone database.
The zone policy includes the merge control mode and default zone policy. For information about
the merge control mode, see "
Zone merge in enhanced zoning mode ."
• Enhanced zoning always performs complete distribution and does not support the zoneset
distribute full command.
You can use the same zone distribution methods for basic zoning as used in enhanced zoning mode.
A switchover between basic zoning and enhanced zoning also causes zone distribution.
Switchover-triggered distribution distributes the active zone set, zone database, zone policy, and hard
zoning status.
For both switchover-triggered distribution and zone distribution in enhanced zoning mode, the SFC
request carries the zone policy whether or not the SFC request carries the active zone set and zone
database.
For zone distribution in enhanced zoning mode, the SFC request always carries hard zoning status.
For zone distribution caused by a switchover from basic zoning to enhanced zoning, the SFC request
carries hard zoning status.