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Message-ID: <476715DB.6050808@trash.net> Date: Tue, 18 Dec 2007 01:35:39 +0100 From: Patrick McHardy <kaber@...sh.net> To: Thomas Graf <tgraf@...g.ch> CC: Chris Friesen <cfriesen@...tel.com>, yoshfuji@...ux-ipv6.org, dada1@...mosbay.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: "ip neigh show" not showing arp cache entries? Thomas Graf wrote: > * Patrick McHardy <kaber@...sh.net> 2007-12-18 00:51 >> Chris Friesen wrote: >>> Patrick McHardy wrote: >>> >>>> From a kernel perspective there are only complete dumps, the >>>> filtering is done by iproute. So the fact that it shows them >>>> when querying specifically implies there is a bug in the >>>> iproute neighbour filter. Does it work if you omit "all" >>> >from the ip neigh show command? >>> >>> Omitting "all" gives identical results. It is still missing entries >>> when compared with the output of "arp". >> >> In that case the easiest way to debug this is probably if you >> add some debugging to ip/ipneigh.c:print_neigh() since I'm >> unable to reproduce this problem. A printf for all the filter >> conditions (=> return 0) at the top should do. > > Alternatively, you can download libnl and run > > NLCB=debug src/nl-neigh-dump brief > > and check if the netlink message is sent by the kenrel for the > neighbour in question. It should be, according to Chris, "ip neigh show <ip>" does show the missing entries, and in case of neighbour entries all filtering is done in userspace. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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