Bug 1030813 - No error when duplicate default routes added in routing table
Summary: No error when duplicate default routes added in routing table
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: iproute
Version: 7.0
Hardware: All
OS: Linux
high
medium
Target Milestone: rc
: ---
Assignee: Petr Šabata
QA Contact: BaseOS QE Security Team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-11-15 08:40 UTC by Guangze Bai
Modified: 2015-02-08 21:39 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-11-15 09:08:25 UTC
Target Upstream Version:

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Description Guangze Bai 2013-11-15 08:40:00 UTC 
Description of problem:


Version-Release number of selected component (if applicable):
In a RHEL7 guest, the initial routing table is:

# ip r s
default via 192.168.122.1 dev eth0  proto static  metric 1024 
192.168.122.0/24 dev eth0  proto kernel  scope link  src 192.168.122.16

# ip route add default via 192.168.122.1 dev eth0  proto static

No error shown and check it again:

# ip r s
default via 192.168.122.1 dev eth0  proto static 
default via 192.168.122.1 dev eth0  proto static  metric 1024 
192.168.122.0/24 dev eth0  proto kernel  scope link  src 192.168.122.16 

There are two default routes. That's the problem.

How reproducible:
always

Expected results:
Ban adding the duplicate in routing table.

Additional info:
Comment 1 Guangze Bai 2013-11-15 08:42:12 UTC 
Forgot to say, I use following to reproduce:

iproute-3.10.0-6.el7.x86_64
kernel-3.10.0-48.el7.x86_64
Comment 3 Petr Šabata 2013-11-15 09:08:25 UTC 
This is not a bug, let alone a regression.  If anything, this is an RFE.  Adding identical routes with different metrics has always been possible.

Even though it doesn't make much sense at first, there may be some scenarios where users could want this.
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