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Date:	Mon, 17 Dec 2007 09:32:53 -0600
From:	"Chris Friesen" <cfriesen@...tel.com>
To:	yoshfuji@...ux-ipv6.org
CC:	dada1@...mosbay.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: "ip neigh show" not showing arp cache entries?

YOSHIFUJI Hideaki / 吉藤英明 wrote:
> In article <47605934.2060604@...tel.com> (at Wed, 12 Dec 2007
> 15:57:08 -0600), "Chris Friesen" <cfriesen@...tel.com> says:

>>> You may try other versions of this command
>>> 
>>> http://devresources.linux-foundation.org/dev/iproute2/download/
>> 
>> They appear to be numbered by kernel version, and the above version
>> is the most recent one for 2.6.14.  Will more recent ones (for
>> newer kernels) work with my kernel?

> It should work; if it doesn't, please make a report.  Thanks.

I downloaded iproute2-2.6.23 and built it for my kernel.

I'm compiling for a different kernel than is actually running on the 
build system, so I had to add a line defining KERNEL_INCLUDE to the 
Makefile, and I had to add "-I${KERNEL_INCLUDE}" to the CFLAGS 
definition.  Someone might want to do something about that...

Anyways, the arp entry issue is still there.  The "arp" command gives a 
bunch of entries:

root@...hoon-base-unit0:/root> arp -n
Address          HWtype  HWaddress           Flags Mask            Iface
192.168.24.81    ether   00:01:AF:14:E9:8A   C                     bond2
172.24.132.2             (incomplete)                              bond0
172.24.136.0     ether   00:C0:8B:07:B3:7E   C                     bond0
172.24.137.0             (incomplete)                              bond0
172.24.0.9       ether   00:07:E9:41:4B:B4   C                     bond0
10.41.18.101     ether   00:0E:0C:5E:95:BD   C                     eth6
172.24.0.11      ether   00:03:CC:51:06:5E   C                     bond0
172.24.132.1     ether   00:01:AF:14:E9:88   C                     bond0
172.24.0.15      ether   00:0E:0C:85:FD:D2   C                     bond0
172.24.0.3       ether   00:01:AF:14:C8:CC   C                     bond0
172.24.0.5       ether   00:01:AF:15:E0:6A   C                     bond0

The original "ip" command and the new one ("/tmp/ip") both give the same 
results--some of the entries are missing.

root@...hoon-base-unit0:/root> ip neigh show all
172.24.137.0 dev bond0  FAILED
172.24.0.9 dev bond0 lladdr 00:07:e9:41:4b:b4 REACHABLE
10.41.18.101 dev eth6 lladdr 00:0e:0c:5e:95:bd REACHABLE
172.24.0.11 dev bond0 lladdr 00:03:cc:51:06:5e STALE
172.24.132.1 dev bond0 lladdr 00:01:af:14:e9:88 REACHABLE
172.24.0.15 dev bond0 lladdr 00:0e:0c:85:fd:d2 STALE
172.24.0.3 dev bond0 lladdr 00:01:af:14:c8:cc REACHABLE
172.24.0.5 dev bond0 lladdr 00:01:af:15:e0:6a STALE

root@...hoon-base-unit0:/root> /tmp/ip neigh show all
172.24.137.0 dev bond0  FAILED
172.24.0.9 dev bond0 lladdr 00:07:e9:41:4b:b4 REACHABLE
10.41.18.101 dev eth6 lladdr 00:0e:0c:5e:95:bd REACHABLE
172.24.0.11 dev bond0 lladdr 00:03:cc:51:06:5e STALE
172.24.132.1 dev bond0 lladdr 00:01:af:14:e9:88 REACHABLE
172.24.0.15 dev bond0 lladdr 00:0e:0c:85:fd:d2 STALE
172.24.0.3 dev bond0 lladdr 00:01:af:14:c8:cc REACHABLE
172.24.0.5 dev bond0 lladdr 00:01:af:15:e0:6a STALE


However, if I specifically try to print out one of the missing entries, 
it shows up:

root@...hoon-base-unit0:/root> /tmp/ip neigh show 192.168.24.81
192.168.24.81 dev bond2 lladdr 00:01:af:14:e9:8a REACHABLE


Chris
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