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Description of problem:
On system with multiple network interfaces, if kdump does the interface mapping,
it will throw:
cat: can't open '/sys/class/net/eth1/dev_id': No such file or directory

Actually there's only eth0 in kdump kernel, eth1 is the old interface in the first kernel.

Normally, this has no problem, but for multiport network card with no "HWADDR" directive specified in ifcfg files, it will rely on DEV_ID to do the matching, and thus problematic.

Version-Release number of selected component (if applicable):
Release 2.0.0-300

How reproducible:


Steps to Reproduce:
1. Using system with multiple network cards installed.
2. Configure to use network dumping via eth1 for example
3. rebuild initramfs and trigger a crash

Actual results:
cat: can't open '/sys/class/net/eth1/dev_id': No such file or directory

Expected results:
No warning printed, and the network dumping can work properly.

Additional info:

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2017-0584.html