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Operating Systems Linux Red Hat Network Teaming not working in RHEL/CentOS 7 Post 302957996 by atanubanerji on Saturday 17th of October 2015 12:48:29 PM
Old 10-17-2015
Network Teaming not working in RHEL/CentOS 7

I was testing Networking Teaming (activebackup) with a VM hosted on VmWare Workstation and VirtualBox, and the result is, if the active interface is down, the system is not using the backup interface.
Tested on both CentOS / RHEL 7

Please find below the command I have used to configure teaming.
Code:
nmcli connection add type team con-name team0 ifname team0 config '{"runner": {"name": "activebackup"}}'
nmcli connection modify team0 ipv4.addresses '192.168.56.150/24'
nmcli connection modify team0 ipv4.method manual

nmcli connection add type team-slave con-name team0-enp0s3 ifname enp0s3 master team0
nmcli connection add type team-slave con-name team0-enp0s8 ifname enp0s8 master team0
teamdctl team0 state

At this stage I am able to see enp0s3 is the active interface and I am able to ping from team0 interface.

But if I make enp0s3 down using
Code:
nmcli dev dis enp0s3

command, or uncheck "Cable Connected" in my vmware or virtualbox network setting, team0 fails.
I am getting expected result in
Code:
teamdctl team0 state

output, that the other interface is active, after disconnecting the primary interface, but practically team0 is failing to use the backup interface.

Please help me to work network teaming as expected.
 

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xmount(1)							      xmount								 xmount(1)

NAME
xmount - Tool to crossmount between multiple input and output harddisk image files SYNOPSIS
xmount [[fopts] [mopts]] <ifile> [<ifile> [...]] <mntp> DESCRIPTION
xmount allows you to convert on-the-fly between multiple input and output harddisk image types. xmount creates a virtual file system using FUSE (Filesystem in Userspace) that contains a virtual representation of the input image. The virtual representation can be in raw DD, Vir- tualBox's virtual disk file format, Microsoft's Virtual Hard Disk Image format or in VmWare's VMDK file format. Input images can be raw DD, EWF (Expert Witness Compression Format) or AFF (Advanced Forensic Format) files. In addition, xmount also supports virtual write access to the output files that is redirected to a cache file. This makes it possible to boot acquired harddisk images using QEMU, KVM, VirtualBox, VmWare or alike. OPTIONS
fopts: (Options specific to FUSE) -d: Enable FUSE's and xmount's debug mode. -h: Display this help message. -s: Run single threaded. -o no_allow_other: Disable automatic addition of FUSE's allow_other option. -o <fmopts> : Specify fuse mount options. Will also disable automatic addition of FUSE's allow_other option! INFO: For VMDK emulation, you have to uncomment "user_allow_other" in /etc/fuse.conf or run xmount as root. mopts: (Options specific to xmount) --cache <file> : Enable virtual write support and set cachefile to use. --in <type> : Specify input image type. Type can be "dd" or "ewf". --info : Print out some infos about used compiler and libraries. --out <type> : Specify output image type. Type can be "dd", "vdi", "vhd", "vmdk(s)". --owcache <file> : Same as --cache <file> but overwrites existing cache. --rw <cache_file> : Same as --cache. --version : Same as --info. INFO: Input and output image type defaults to "dd" if not specified. ifile: Input image file. If you use EWF files, you have to specify all image segments! (If your shell supports it, you can use .E?? as file extension to specify them files) mntp: Mount point where virtual files should be located. BUGS
Hopefully none. If you find any, please e-mail to <bugs@pinguin.lu>. EXAMPLE
To xmount an EWF image from your acquired disk as a raw DD image under /mnt, use the following command: xmount --in ewf ./acquired_disk.E?? /mnt To xmount the same ewf image as vdi file, you would use a command like this: xmount --in ewf --out vdi ./acquired_disk.E?? /mnt And to enable virtual write support on a raw DD input image xmounted as VDI file: xmount --out vdi --cache ./acquired_disk.cache ./acquired_disk.dd /mnt Gillen Daniel May 9, 2012 xmount(1)
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