lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Fri, 11 Apr 2014 11:30:42 -0700
From:	Stephen Hemminger <>
To:	zhuyj <>
Cc:, "David S. Miller" <>,,,
	"Yang, Zhangle (Eric)" <>,
	"Tao, Yue" <>,
	"Zadoyan, Grant" <>,,,,
Subject: Re: Should linux send netlink message as it is deleting that
 routing entry?

On Fri, 11 Apr 2014 17:15:48 +0800
zhuyj <> wrote:

> > With ubuntu 12.04, I run the following to reproduce this defect.
> >
> > 1) Configure an interface
> > ifconfig eth1 up
> >
> > 2) Add routing entry via that interface address
> > route add -net gw
> >
> > 3) Change the ip address on that interface as shown below.
> > ifconfig eth1 up
> >
> > 4) Check netlink messages with "ip monitor all". There is no route 
> > delete netlink message.
> >

With IPv4 there are several cases where there is a non-notified
implicit route withdrawal. This is not something that can be fixed.
There are two issues:
 1. with large backbone size route tables (ie 1M routes), the number
    of notification messages becomes a bottleneck and would be unreliable
 2. the existing routing daemons (quagga, bird, etc) all understand/expect
    the existing semantics

To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists