From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yang Yingliang Subject: A problem about ICMP packet-too-big message handler Date: Tue, 27 Jan 2015 20:58:53 +0800 Message-ID: <54C78B8D.1070104@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit To: netdev , "David S. Miller" Return-path: Received: from szxga03-in.huawei.com ([119.145.14.66]:25909 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758854AbbA0M73 (ORCPT ); Tue, 27 Jan 2015 07:59:29 -0500 Sender: netdev-owner@vger.kernel.org List-ID: Hi, My kernel is 3.10 LTS. I got a problem here about handling ICMP packet-too-big message. Before sending a packet-too-big packet : # ip -6 route list table local local ::1 dev lo metric 0 local fe80:: dev lo metric 0 local fe80:: dev lo metric 0 local fe80:: dev lo metric 0 local fe80:: dev lo metric 0 local fe80:: dev lo metric 0 local fe80:: dev lo metric 0 local fe80::1 dev lo metric 0 //It does not have expire value local fe80::200:ff:fe00:0 dev lo metric 0 local fe80::200:ff:fe00:0 dev lo metric 0 local fe80::200:ff:fe00:0 dev lo metric 0 local fe80::200:ff:fe00:0 dev lo metric 0 local fe80::200:ff:fe00:2 dev lo metric 0 local fe80::5054:ff:fe12:3456 dev lo metric 0 After sending a packet-too-big packet ip -6 route list table local local ::1 dev lo metric 0 local fe80:: dev lo metric 0 local fe80:: dev lo metric 0 local fe80:: dev lo metric 0 local fe80:: dev lo metric 0 local fe80:: dev lo metric 0 local fe80:: dev lo metric 0 local fe80::1 dev lo metric 0 expires _597_ //It has expire value local fe80::200:ff:fe00:0 dev lo metric 0 local fe80::200:ff:fe00:0 dev lo metric 0 local fe80::200:ff:fe00:0 dev lo metric 0 local fe80::200:ff:fe00:0 dev lo metric 0 local fe80::200:ff:fe00:2 dev lo metric 0 local fe80::5054:ff:fe12:3456 dev lo metric 0 When time is up, I can't ping fe80::1 . Is it ok or a bug ? Regards, Yang