Chapter 45: IP Interface Commands
ND Snooping
– 1369 –
ND snooping maintains a binding table in the process of neighbor
discovery. When it receives an Neighbor Solicitation (NS) packet from a
host, it creates a new binding. If it subsequently receives a Neighbor
Advertisement (NA) packet, this means that the address is already being
used by another host, and the binding is therefore deleted. If it does not
receive an NA packet after a timeout period, the binding will be bound to
the original host. ND snooping can also maintain a prefix table used for
stateless address auto-configuration by monitoring Router Advertisement
(RA) packets sent from neighboring routers.
ND snooping can also detect if an IPv6 address binding is no longer valid.
When a binding has been timed out, it checks to see if the host still exists
by sending an NS packet to the target host. If it receives an NA packet in
response, it knows that the target still exists and updates the lifetime of
the binding; otherwise, it deletes the binding.
This section describes commands used to configure ND Snooping.
ipv6 nd snooping
This command enables ND snooping globally or on a specified VLAN or
range of VLANs. Use the
no
form to disable this feature.
S
YNTAX
[no] ipv6 nd snooping [vlan {
vlan-id
|
vlan-range
}]
Table 45-9: ND Snooping Commands
Command
Function
Mode
Enables ND snooping globally or on a specified VLAN
or range of VLANs
GC
Enables automatic validation of binding table entries
by periodically sending NS messages and awaiting
NA replies
GC
Sets the number of times to send an NS message to
determine if a binding is still valid
GC
Sets the interval between sending NS messages to
determine if a binding is still valid
GC
Sets the time to wait for an RA message before
deleting an entry in the prefix table
GC
Sets the maximum number of address entries which
can be bound to a port
IC
Configures a port as a trusted interface from which
prefix information in RA messages can be added to
the prefix table, or NS messages can be forwarded
without validation
IC
Clears all entries in the address binding table
PE
Clears all entries in the prefix table
PE
Shows configuration settings for ND snooping
PE
Shows entries in the binding table
PE
Show entries in the prefix table
PE
Содержание SSE-G2252
Страница 42: ...44 General IP Routing on page 627...
Страница 174: ...Chapter 6 VLAN Configuration Configuring VLAN Mirroring 178 Figure 6 27 Showing the VLANs to Mirror...
Страница 511: ...Chapter 14 Basic Administration Protocols UDLD Configuration 518 Figure 14 100 Displaying UDLD Neighbor Information...
Страница 603: ...Chapter 16 IP Configuration Setting the Switch s IP Address IP Version 6 609...
Страница 883: ...Chapter 24 General Security Measures Port based Traffic Segmentation 894...
Страница 989: ...Chapter 30 Congestion Control Commands Automatic Traffic Control Commands 1000 Console...
Страница 1007: ...Chapter 33 Address Table Commands 1019...
Страница 1137: ...Chapter 38 Quality of Service Commands 1150...
Страница 1366: ...Chapter 46 IP Routing Commands Global Routing Configuration 1381 Connected 2 Total 2 FIB 0 Console...