From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: iproute2 caching and batch mode Date: Sat, 08 Jan 2011 22:09:39 +0200 Message-ID: <0befc7c09f04936c1244eaa5a1d2620c@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit To: Stephen Hemminger , Return-path: Received: from hosting.visp.net.lb ([194.146.153.11]:56867 "EHLO hosting.visp.net.lb" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751159Ab1AHUTl (ORCPT ); Sat, 8 Jan 2011 15:19:41 -0500 Sender: netdev-owner@vger.kernel.org List-ID: Hi, noticed some issue a while ago, and because of recent patches decided to post my thoughts: This issue can happen if ip or tc running in some kind of "daemon" batch mode, or processing large batch file on computer where interfaces can reappear with same name but different index (pppoe NAS for example). It is easy to reproduce the problem: centaur iproute2-2.6.37 # ip/ip -force -batch - tunnel add test0 mode ipip remote 1.1.1.2 local 1.1.1.1 link show dev test0 201: test0: mtu 1480 qdisc noop state DOWN link/ipip 1.1.1.1 peer 1.1.1.2 tunnel del test0 Unsupported family:17 Or: centaur iproute2-2.6.37 # ip/ip -force -batch - tunnel del test0 tunnel add test0 mode ipip remote 1.1.1.2 local 1.1.1.1 link show dev test0 202: test0: mtu 1480 qdisc noop state DOWN link/ipip 1.1.1.1 peer 1.1.1.2 (another console, delete and create again test0) link show dev test0 (nothing will appear)