From owner-freebsd-bugs@FreeBSD.ORG Mon May 26 01:10:02 2008 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 886E4106566B for ; Mon, 26 May 2008 01:10:02 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 56A8B8FC19 for ; Mon, 26 May 2008 01:10:02 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.14.2/8.14.2) with ESMTP id m4Q1A2Mw090481 for ; Mon, 26 May 2008 01:10:02 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.2/8.14.1/Submit) id m4Q1A2It090480; Mon, 26 May 2008 01:10:02 GMT (envelope-from gnats) Resent-Date: Mon, 26 May 2008 01:10:02 GMT Resent-Message-Id: <200805260110.m4Q1A2It090480@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Barrett Lyon Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DCD931065670 for ; Mon, 26 May 2008 01:00:21 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (www.freebsd.org [IPv6:2001:4f8:fff6::21]) by mx1.freebsd.org (Postfix) with ESMTP id BD3A48FC22 for ; Mon, 26 May 2008 01:00:21 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.14.2/8.14.2) with ESMTP id m4Q0wmun001348 for ; Mon, 26 May 2008 00:58:48 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.14.2/8.14.1/Submit) id m4Q0wmPV001347; Mon, 26 May 2008 00:58:48 GMT (envelope-from nobody) Message-Id: <200805260058.m4Q0wmPV001347@www.freebsd.org> Date: Mon, 26 May 2008 00:58:48 GMT From: Barrett Lyon To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: misc/123992: ECMP does not remove/disable next-hop for downed GRE interface X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 May 2008 01:10:02 -0000 >Number: 123992 >Category: misc >Synopsis: ECMP does not remove/disable next-hop for downed GRE interface >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon May 26 01:10:02 UTC 2008 >Closed-Date: >Last-Modified: >Originator: Barrett Lyon >Release: 8.0-CURRENT >Organization: >Environment: FreeBSD home.blyon.com 8.0-CURRENT FreeBSD 8.0-CURRENT #3: Sun May 25 02:18:13 PDT 2008 blyon@home.blyon.com:/usr/obj/usr/src/sys/GENERIC i386 >Description: Using RADIX_MPATH support in the kernel provides the desired ECMP support. I have two GRE tunnels setup with two routes defined for the same destination. When using ifconfig to down one of the tunnels, the route/next-hop for the downed tunnel stays active. I would assume that once the GRE tunnel is down, the network on that interface is no longer available, thus the next-hop on that network should also no longer be an active next-hop. This appears to work with if_em. >How-To-Repeat: Create two GRE tunnels, create two routes for the same destination address which route over the two GRE interfaces. Verify that ECMP is working over the two interfaces, then down/disable one GRE interface with ifconfig and traffic goes to a bit bucket. >Fix: none >Release-Note: >Audit-Trail: >Unformatted: