Bug 60587 - Bringing up a dummy interface causes error message
Summary: Bringing up a dummy interface causes error message
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: initscripts (Show other bugs)
(Show other bugs)
Version: 7.2
Hardware: i386 Linux
Target Milestone: ---
Assignee: Bill Nottingham
QA Contact: Brock Organ
Depends On:
TreeView+ depends on / blocked
Reported: 2002-03-01 21:00 UTC by Kambiz Aghaiepour
Modified: 2014-03-17 02:25 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-09-29 19:40:47 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Kambiz Aghaiepour 2002-03-01 21:00:55 UTC
From Bugzilla Helper:
User-Agent: hippie/0.01 [en] (VGA; U; some O/S)

Description of problem:
Bringing up a dummy interface, though seems to function, has issues with an
error reported upon ifup'ing the interface, IF the NETMASK is set to  This has to be the netmask, as we want to avoid adding network
routes on the dummy interface.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Create /etc/sysconfig/network-scripts/ifcfg-dummy0 with the following

(with a.b.c.d being an actual address of course)

2. run "ifup dummy0"

3. See the output:
RTNETLINK answers: File exists

Actual Results:  The other thing to note (which is different than the 6.2
behavior, which does work by the way) is the routing table entries that are
created.  After upping the interface, the routing table looks like such: UH       40 0          0 dummy0   U        40 0          0 eth0   U        40 0          0 eth1       U        40 0          0 lo         UG       40 0          0 eth0

I would have expected the entry for dummy0 to look like:

a.b.c.d UH       40 0          0 dummy0

(where a.b.c.d is that real IP address assigned to the dummy interface and seen
from the output of ifconfig -a)

Expected Results:  Described in "actual results"

Additional info:

Comment 1 Bill Nottingham 2005-09-29 19:40:47 UTC
Closing bugs on older, no longer supported, releases. Apologies for any lack of

If this persists on a current release, such as Fedora Core 4, please open a new bug.

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