H3C s3100 series Command Manual page 1025

Among S3100 series switches, only S3100-EI series switches support the two commands.
Examples
# Enable ND snooping for VLAN 1.
<Sysname> system-view
[Sysname] vlan 1
[Sysname-vlan1] ipv6 nd snooping enable
ipv6 nd snooping uplink
Syntax
ipv6 nd snooping uplink [ learn [ probe ] ]
undo ipv6 nd snooping uplink
View
Layer 2 Ethernet port view
Parameters
learn: Permits the ND snooping uplink port to learn ND snooping entries.
probe: Permits active acknowledgement using the learned ND snooping entries.
Description
Use the ipv6 nd snooping uplink command to configure a port as an ND snooping uplink port.
Use the undo ipv6 nd snooping uplink command to restore the default.
By default, a port is not an ND snooping uplink port.
Note that:
Use the ipv6 nd snooping uplink command to configure a port as an ND snooping uplink port that
does not learn any ND snooping entries.
Use the ipv6 nd snooping uplink learn command to configure a port as an ND snooping uplink
port that learns ND snooping entries but does not use the learned ND snooping entries to perform
active acknowledgement.
Use the ipv6 nd snooping uplink learn probe command to configure a port as an ND snooping
uplink port that learns ND snooping entries and uses the learned ND snooping entries to perform
active acknowledgement.
The ND snooping entries learned by an ND snooping uplink port are not used by IPv6 filtering.
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