Bug 337651 - network-bridge do not work with vlan interfaces
network-bridge do not work with vlan interfaces
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: xen (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Daniel Berrange
Yulia Kopkova
Depends On:
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Reported: 2007-10-18 06:06 EDT by Alain RICHARD
Modified: 2010-10-22 15:35 EDT (History)
7 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2009-01-20 16:13:39 EST
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2009:0118 normal SHIPPED_LIVE xen bug fix and enhancement update 2009-01-20 11:04:49 EST

  None (edit)
Description Alain RICHARD 2007-10-18 06:06:39 EDT
Description of problem:

The network-bridge do not support vlan interfaces. Our setup needs that the main
interface is a vlan one (eth3.1), so we have to invoke the network-bridge script
with something like :

/etc/xen/scripts/network-bridge start vifnum=0 netdev=eth3.1 bridge=vlan1

the problem is that the network-bridge scripts fails to do its job because it
issue a ifdown eth3.1 that removes the vlan 1 on interface eth3. The scripts
already make sure that the interface is not a bonding as a special case, but
must also treat a vlan interface as a special case.

A simple fix :

--- network-bridge      2007-10-18 10:13:26.000000000 +0200
+++ network-bridge.new  2007-10-18 10:13:38.000000000 +0200
@@ -78,6 +78,10 @@
     [ -f "/sys/class/net/$1/bonding/slaves" ]
+is_vlan() {
+    [ -f "/proc/net/vlan/$1" ]
 is_ifup() {
     ip link show dev $1 | awk '{ exit $3 !~ /[<,]UP[,>]/ }'
@@ -214,7 +218,7 @@
        mac=`ip link show ${netdev} | grep 'link\/ether' | sed -e 's/.*ether
        preiftransfer ${netdev}
        transfer_addrs ${netdev} ${vdev}
-       if is_bonding ${netdev} || ! ifdown ${netdev}; then
+       if is_bonding ${netdev} || is_vlan ${netdev} || ! ifdown ${netdev}; then
            # Remember the IP details if necessary.
            get_ip_info ${netdev}
            ip link set ${netdev} down

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

Comment 1 RHEL Product and Program Management 2008-06-02 16:30:21 EDT
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
Comment 3 Daniel Berrange 2008-09-09 05:48:49 EDT
Built into xen-3.0.3-72.el5
Comment 8 errata-xmlrpc 2009-01-20 16:13:39 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 therefore 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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