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Shell Programming and Scripting
awk : match only the pattern string , not letters or numbers after that.
Post 302813595 by Yoda on Monday 27th of May 2013 04:48:48 PM
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LEARN ABOUT HPUX
ndp
ndp(1M) ndp(1M) NAME
ndp - IPv6 Neighbor Discovery cache display and control SYNOPSIS
host interface] interface] interval interface] host interface] interface] interface] interface host hw_addr filename DESCRIPTION
The command displays and modifies the IPv6 Neighbor Discovery cache as specified in the IPv6 Neighbor Discovery (ND) protocol. Options recognizes the following options and arguments: host Display the current Neighbor Discovery cache entries for the host specified by host, which is either a name present in the hostname database (see hosts(4)), or an IPv6 address expressed in colon notation (see inet6(3N)). Select the Neighbor Discovery cache entries for the specified interface. There is no distinction between primary and secondary interfaces. Therefore, specifying is the same as speci- fying Display host addresses in IPv6 colon notation. If this option is not specified, attempts to display host addresses symbolically first, and falls back to displaying the host addresses in IPv6 colon notation if that failed. Display all Neighbor Discovery cache entries. Continuously display all Neighbor Discovery cache entries, updated at each interval, measured in seconds. Deletes Neighbor Discovery cache entries with IP addresses that are not associated with local interfaces for the host specified by host. Flushes all Neighbor Discovery cache entries with IP addresses that are not associated with local interfaces. These are entries with the (local) flag set. Refer to the section of this manpage for information about flags. (Quiet) Do not write anything to standard output. This option only applies to and options. Display the prefix list in the Neighbor Discovery cache table. The prefix list defines a set of IP address ranges that the host can reach. The prefix flags are for on-link, and for au- tonomous. The on-link flag indicates that addresses with that prefix can be reached directly without going through a router. The autonomous flag indicates that the prefix came from stateless autoconfiguration. Flushes all autoconfigured addresses learned from prefixes advertised by the Router Advertisement Messages. Create a Neighbor Discovery cache entry for the interface specified by interface, the host specified by host, and the hardware address (link-layer address) specified by hw_addr. The hw_addr is specified as where each x is a hexadecimal digit. If is specified, the entry is published, which means that this system will respond to Neighbor Solicitation for the speci- fied "host" even though the host address is not its own. If is specified, it means that the published entry refers to an anycast address. This parameter can only be specified when the parameter is specified. Create Neighbor Discovery cache entries from the specifications found in the file specified by filename. Each entry in this file specifies the interface, host, hw_addr, and optionally the flag. For example, the content of this file can be: The use of and options requires root privileges. Contents A Neighbor Discovery cache entry includes the following fields: o host (neighbor's host name or IP address) o hardware address (link layer address) of host o interface name o state o flags The state of an entry can be or o An entry is in an state if address resolution is in progress and the hardware address of the neighbor has not been determined. o An entry is in a state if the neighbor is known to have been reachable recently. o An entry is in a state if the neighbor is no longer known to be reachable. However, no attempt has been made to verify its reachability because no traffic has been sent to this neighbor. o An entry is in a state if the neighbor is no longer known to be reachable, and traffic has recently been sent to the neighbor. o An entry is in a state if the neighbor is no longer known to be reachable, and unicast Neighbor Solicitation probes have been sent to verify reachability. The flags can be (Deprecated), (Local), (Published), (Temporary), (Auto), or (anycast). A deprecated address can be used for receiving packets, but it should not be used for sending packets because its validity is expected to expire soon. The local flag indicates that this Neighbor Discovery cache entry corresponds to an interface on this host. The published flag indicates that the host will respond to Neigh- bor Solicitations on this IPv6 address. The temporary flag indicates that the address has a randomly generated interface identifier which changes over time. The autonomous flag indicates that the prefix for the address came from stateless address autoconfiguration. The any- cast flag indicates that the address is an anycast address. DIAGNOSTICS
returns a non-zero value to indicate errors. A zero return value indicates success. EXAMPLES
The following output shows the local interfaces and the IP addresses assigned to them. Name Mtu Address/Prefix Ipkts Opkts lan1 1500 fe80::210:83ff:fef7:3a21/10 982 759 lan1:1 1500 fec0::9:210:83ff:fef7:3a21/64 0 0 lan3 1500 fe80::210:83ff:fef7:7a9d/10 0 0 lo0 4136 ::1/128 57 57 To display the entire Neighbor Discovery cache: Destination Physical Address Interface State Flags fe80::202:fdff:fe36:8720 0:2:fd:36:87:20 lan1 STALE - fec0::9:210:83ff:fef7:3a21 0:10:83:f7:3a:21 lan1:1 REACHABLE LP fe80::210:83ff:fef7:3a21 0:10:83:f7:3a:21 lan1 REACHABLE LP fe80::210:83ff:fef7:7a9d 0:10:83:f7:7a:9d lan3 REACHABLE LP To show Neighbor Discovery cache entries for a host: Destination Physical Address Interface State Flags fe80::210:83ff:fef7:3a21 0:10:83:f7:3a:21 lan1 REACHABLE LP To show Neighbor Discovery cache entries for an interface: Destination Physical Address Interface State Flags fe80::210:83ff:fef7:7a9d 0:10:83:f7:7a:9d lan3 REACHABLE LP To delete a Neighbor Discovery cache entries for a host and an interface: fe80::202:fdff:fe36:8720 (fe80::202:fdff:fe36:8720) deleted. To show the prefix list: Prefix List Interface Valid Preferred Flags Entries Lifetime Lifetime fec0:0:0:9::/64 lan1 167 107 A fe80::/10 lan1 inf inf LA fe80::/10 lan3 inf inf LA To add an entry in the Neighbor Discovery cache: nodeb (2001::1) added. Destination Physical Address Interface State Flags fe80::210:83ff:fef7:7a9d 0:10:83:f7:7a:9d lan3 REACHABLE LP 2001::1 0:1:2:3:4:5 lan3 - - To flush all remote entries: nodea (fe80::202:fdff:fe36:8720) flushed. nodeb (2001::1) flushed. AUTHOR
was developed by HP. SEE ALSO
hosts(4), inet6(3N), ndp(7P). Neighbor Discovery for IP Version 6 (IPv6), RFC2461, Narten, Nordmark, Simpson. IPv6 Stateless Address Autoconfiguration, RFC2462, Thomson, Narten. ndp(1M)