Bug 161513 - arping logic in /etc/init.d/netdump doesn't scale
arping logic in /etc/init.d/netdump doesn't scale
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: netdump (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Jeff Moyer
Depends On:
Blocks: 168429
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Reported: 2005-06-23 16:40 EDT by Joshua Jensen
Modified: 2007-11-30 17:07 EST (History)
2 users (show)

See Also:
Fixed In Version: RHBA-2006-0038
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2006-03-07 13:24:34 EST
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Joshua Jensen 2005-06-23 16:40:41 EDT
Description of problem:

For security reasons, my global organization may have to turn of proxy arp. 
This means that when arpping fails to find the MAC of the IP of the
netdump-server, the netdump startup script errors out.  This isn't a problem if
the client is on the same subnet/vlan as the server, but if it isn't we
unnecisarily see errors:

netdump: cannot arp
netdump: cannot find in arp cache
netdump: can't resolve MAC address
netdump server address resolution                          [FAILED]

Most enterprises *don't* have a netdump-server per subnet, they have one per
location.  In this setup we have to hardcode the MAC address of the gateway into
/etc/sysconfig/netdump.  We need all this, which causes netdump to fail, to get
the MAC that was hardcoded anyway?

Why rely on arping working?  Why not leave the MAC address in
/etc/sysconfig/netdump optional, even for netdump-across-subnet scenarios, and
just do this:

arping netdump_server_IP && use_server_MAC || arping default_gateway_IP &&


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

netdump in RHEL3 and RHEL4
Comment 1 Jeff Moyer 2005-06-27 15:42:40 EDT
I'll take a look.
Comment 4 Jeff Moyer 2005-08-01 11:40:40 EDT
I've built a fix for this into netdump-0.7.10-3, and posted the i386 package here:

Note that this rpm is being provided for testing only.  It has not seen any QA
other than the testing I performed in my environment.  Please provide feedback.
Comment 5 Ray Bellis 2005-08-17 05:59:12 EDT
The change to /etc/rc.d/init.d/netdump works for me - the syslog server I wanted
to dump to is completely offsite, so I needed to be able to put the default GW's
MAC address in /etc/sysconfig/netdump, but previously couldn't without modifying
the startup script.

Will this make it into the next RHEL 3 update?

Comment 6 Jeff Moyer 2005-08-17 07:50:49 EDT
Thanks for the testing feedback.  This fix is not going to be in Update 6,
Comment 7 Joshua Jensen 2005-08-26 16:36:53 EDT
How about U7 ??
Comment 16 Joshua Jensen 2005-12-28 11:28:40 EST
PING.... How about U7?
Comment 18 Red Hat Bugzilla 2006-03-07 13:24:34 EST
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


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