Control the IPv6 Neighbor Discovery Protocol
Syntax:
ndp -A wait [-ntl]
ndp -a [-ntl]
ndp -c [-nt]
ndp -d [-nt] hostname
ndp -f [-nt] filename
ndp -H
ndp -I [delete|interface]
ndp -i interface [flags...]
ndp -P
ndp -p
ndp -R
ndp -r
ndp -s [-nt] nodename ether_addr [temp] [proxy]
Options:
- -A wait
- Repeat -a (dump NDP entries) every wait seconds.
- -a
- Dump the existing NDP entries.
- -c
- Erase all NDP entries.
- -d hostname
- Delete the NDP entry for this hostname.
- -f filename
- Parse the file specified by filename.
- -H
- Harmonize consistency between the routing table and the default router list;
install the top entry of the list into the kernel routing table.
- -I [delete|interface]
- Show or specify the default interface that's to be used as the default route when there's no default router.
| Option: |
Action: |
| -I |
Show the current default interface. |
| -I delete |
Delete the current interface from the kernel. |
| -I interface |
Use this interface as the default. |
- -i interface [flags...]
- View the neighbor discovery (ND) information for this interface.
If flags is specified, set or clear the flag(s) associated with this interface.
A flag is cleared if it starts with a hyphen (-).
For example, to disable IPv6 on an interface:
ndp -i interface disabled
To re-enable IPv6 on an interface:
ndp -i interface -- -disabled
The supported flags include:
- nud — toggle Neighbor Unreachability Detection on the interface (the default is on)
- accept_rtadv — specify whether or not to accept Router Advertisement
messages received on the interface
- auto_linklocal — specify whether or not to perform automatic link-local
address configuration on interface
- override_rtadv — specify whether or not to override the
net.inet6.ip6.accept_rtadv variable
- prefer_source — prefer addresses on the interface as candidates of the source
address for outgoing packets
- disabled — disable IPv6 operation on the interface
- basereachable=number — specify the BaseReachbleTimer on the interface in
milliseconds.
- retrans=number — specify the RetransTimer on the interface
in milliseconds.
- curhlim=number — specify the Cur Hop Limit on the interface
- -n
- Don't try to resolve a numeric address to a hostname.
- -P
- Flush all the entries in the prefix list.
- -p
- Show the prefix list.
- -R
- Flush all the entries in the default router list.
- -r
- Show the default router list.
- -s nodename ether_addr [temp] [proxy]
- Register a permanent NDP entry for this node (use temp to register a temporary entry).
If you specify proxy, the system acts as a proxy NDP server
that responds to requests for hostname even though the host address is not its own.
Description:
This utility manipulates the address mapping table used by the Neighbor Discovery Protocol (NDP).
Exit status:
- 0
- Successful completion.
- Nonzero
- An error occurred.