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IPv6: Neighbor discovery diagnostics utility for Linux?

To: <usagi-users@xxxxxxxxxxxxxx>
Subject: IPv6: Neighbor discovery diagnostics utility for Linux?
From: Pekka Savola <pekkas@xxxxxxxxxx>
Date: Wed, 2 May 2001 15:16:16 +0300 (EEST)
Cc: <netdev@xxxxxxxxxxx>
Sender: owner-netdev@xxxxxxxxxxx
Hi,

Is there an utility to diagnose/control neighbour discovery, list all
neighbors, routers etc. for Linux?

I haven't been able to find one.  Please provide pointers if you have.

For example, KAME ndp(8) (see:
http://www.FreeBSD.org/cgi/man.cgi?query=ndp&sektion=8) is very nice.
(ndp is like arp(8) transformed into IPv6)

A few examples:

# ndp -a [ndp entries]
Neighbor                        Linklayer Address  Netif Expire    St Flgs Prbs
3ffe:2620:1:ff88::1             (incomplete)        gif1 expired   S  R
3ffe:2620:10:1::1               0:90:27:bd:62:c6    fxp0 permanent R
3ffe:2620:10:1::82e9:1311       0:50:4:3c:98:a9     fxp0 expired   S
3ffe:2620:10:1:250:daff:fed3:5a 0:50:da:d3:5:a6     fxp0 expired   S
3ffe:2620:10:1:290:27ff:fe4f:fd 0:90:27:4f:fd:3a    fxp0 expired   S
fe80::250:4ff:fe3c:98a9%fxp0    0:50:4:3c:98:a9     fxp0 expired   S
fe80::290:27ff:fe4f:fd3a%fxp0   0:90:27:4f:fd:3a    fxp0 10s       D
fe80::290:27ff:febd:62c6%fxp0   0:90:27:bd:62:c6    fxp0 permanent R

# ndp -p [prefixes]
3ffe:2620:1:ff88::/126 if=gif1
  advertise: flags=LA vltime=infinity, pltime=infinity, expire=Never, origin=RR
3ffe:2620:10:1::/64 if=fxp0
  advertise: flags=LA vltime=infinity, pltime=infinity, expire=Never, origin=RR

This kind of tool could prove really useful sometimes, especially when
debugging different kinds of IPv6 setups.

-- 
Pekka Savola                 "Tell me of difficulties surmounted,
Netcore Oy                   not those you stumble over and fall"
Systems. Networks. Security.  -- Robert Jordan: A Crown of Swords



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