Bug 17745

Summary:	Wrong outgoing IP address with IP aliases
Product:	[Retired] Red Hat Linux	Reporter:	Need Real Name <volker>
Component:	kernel	Assignee:	Michael K. Johnson <johnsonm>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.2
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2001-01-30 00:24:01 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Need Real Name 2000-09-20 15:22:45 UTC

I have set up my machine with one IP alias interface (eth0:0). The to
adresses are assigned
correctly. But if I establish an outgoing connection the originating
address is not the primary
IP assigned to eth0, but the alias IP assigned to eth0:0. If I run "ifdown
eth0" and afterwards
"ifup eth0" everything works fine and the right IP address is used for
outgoing connections.

Comment 1 Bill Nottingham 2001-01-30 00:23:57 UTC

That is done by the kernel; it's not an initscripts problem.

Comment 2 Michael K. Johnson 2001-01-30 23:00:52 UTC

David Miller reports:
The selection of source address for outgoing packets
through primary or aliased interfaces is basically
arbitrary.

Those who absolutely require a specific source address
need to use the "ip" program to tell the kernel the
preferred source address for outgoing routes through
those interfaces.