----- Forwarded Message -----
From: "Andrew Holway" <a.hol...@syseleven.de>
To: "Alex Jia" <a...@redhat.com>
Cc: k...@vger.kernel.org
Sent: Friday, August 17, 2012 4:24:33 PM
Subject: Re: [libvirt-users] vm pxe fail
Hello,
On Aug 17, 2012, at 4:34 AM, Alex Jia wrote:
> Hi Andrew,
> I can't confirm a root reason based on your information, perhaps you may
> try to find a reason by yourself via the following docs:
>
> http://wiki.libvirt.org/page/PXE_boot_%28or_dhcp%29_on_guest_failed
> (Troubleshooting)
> http://docs.fedoraproject.org/en-US/Fedora/13/html/Virtualization_Guide/sect-Virtualization-Virtualized_guest_installation_overview-Installing_guests_with_PXE.html
> (User Guide)
Everything seems quite normal.
>
> If can't, please provide your version of kvm, libvirt, tftp, etc, and run
> 'virsh net-dumpxml br0' to dump your
> network bridge XML configuration, and run 'cat pxelinux.cfg' to show your
> pxelinux configuration, thanks.
default is my pxelinux configuration but I'm not sure is this is what your
after.
dhcp is a protocol decode of the DHCP traffic. You see that the VM is sending
each request twice which is a bit odd.
[root@node002 ~]# yum list | grep qemu
gpxe-roms-qemu.noarch 0.9.7-6.9.el6 @base
qemu-img.x86_64 2:0.12.1.2-2.295.el6_3.1 @updates
qemu-kvm.x86_64 2:0.12.1.2-2.295.el6_3.1 @updates
qemu-guest-agent.x86_64 2:0.12.1.2-2.295.el6_3.1 updates
qemu-kvm-tools.x86_64 2:0.12.1.2-2.295.el6_3.1 updates
br0 is created by brctl. There is not XML config as far as I am aware.
[root@node002 ~]# ifconfig br0
br0 Link encap:Ethernet HWaddr 00:9C:02:24:1A:E0
inet addr:10.141.80.2 Bcast:10.141.255.255 Mask:255.255.0.0
inet6 addr: fe80::29c:2ff:fe24:1ae0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:185129 errors:0 dropped:0 overruns:0 frame:0
TX packets:2094 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:8820359 (8.4 MiB) TX bytes:123842 (120.9 KiB)
[root@node002 ~]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:02:C9:36:21:A1
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
[root@node002 ~]# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.009c02241ae0 no eth1
vnet0
virbr0 8000.525400a6d5aa yes virbr0-nic
>
> --
> Regards,
> Alex
>
>
> ----- Original Message -----
> From: "Andrew Holway" <a.hol...@syseleven.de>
> To: k...@vger.kernel.org
> Sent: Thursday, August 16, 2012 8:25:35 PM
> Subject: [libvirt-users] vm pxe fail
>
> Hallo
>
> I have a kvm vm that I am attempting to boot from pxe. The dhcp works
> perfectly and I can see the VM in the pxe server arp. but the tftp just times
> out. I don't see any tftp traffic on either the physical host or on the pie
> server. I am using a bridged interface. I have tried using several virtual
> nic drivers, several different mac addresses and several different ips. on
> the physical host I can get the pxelinux.0 file from the pxe server via tftp
> and can clearly see that traffic with tcpdump.
>
> Ive tried using various virtual interfaces.
>
> I can pxe boot my physical hosts with no problems.
>
> I can tftp fine from the physical host and see the traffic with ethdump
>
> Here is the terminal output from the VM:
> https://dl.dropbox.com/u/98200887/Screen%20Shot%202012-08-15%20at%206.41.12%20PM.png
>
> Thanks,
>
> Andrew
>
> [root@node002 ~]# yum list | grep qemu
> gpxe-roms-qemu.noarch 0.9.7-6.9.el6 @base
>
> qemu-img.x86_64 2:0.12.1.2-2.295.el6_3.1 @updates
>
> qemu-kvm.x86_64 2:0.12.1.2-2.295.el6_3.1 @updates
>
> qemu-guest-agent.x86_64 2:0.12.1.2-2.295.el6_3.1 updates
>
> qemu-kvm-tools.x86_64 2:0.12.1.2-2.295.el6_3.1 updates
>
> [root@node002 ~]# ethtool eth0
> Settings for eth0:
> Supported ports: [ TP ]
> Supported link modes: 10000baseT/Full
> Supports auto-negotiation: No
> Advertised link modes: 10000baseT/Full
> Advertised pause frame use: No
> Advertised auto-negotiation: No
> Speed: Unknown!
> Duplex: Unknown! (255)
> Port: Twisted Pair
> PHYAD: 0
> Transceiver: internal
> Auto-negotiation: off
> MDI-X: Unknown
> Supports Wake-on: g
> Wake-on: g
> Current message level: 0x00000014 (20)
> Link detected: no
>
> [root@node002 ~]# brctl show
> bridge name bridge id STP enabled interfaces
> br0 8000.009c02241ae0 no eth1
> vnet0
> virbr0 8000.525400a6d5aa yes virbr0-nic
>
> [root@node002 ~]# ethtool vnet0
> Settings for vnet0:
> Supported ports: [ ]
> Supported link modes:
> Supports auto-negotiation: No
> Advertised link modes: Not reported
> Advertised pause frame use: No
> Advertised auto-negotiation: No
> Speed: 10Mb/s
> Duplex: Full
> Port: Twisted Pair
> PHYAD: 0
> Transceiver: internal
> Auto-negotiation: off
> MDI-X: Unknown
> Current message level: 0xffffffa1 (-95)
> Link detected: yes
>
> <domain type='kvm'>
> <name>vm004</name>
> <uuid>4f03b09b-e834-bbf3-a6c2-1689f3156ef2</uuid>
> <memory unit='KiB'>2097152</memory>
> <currentMemory unit='KiB'>2097152</currentMemory>
> <vcpu placement='static'>2</vcpu>
> <os>
> <type arch='x86_64' machine='rhel6.3.0'>hvm</type>
> <boot dev='hd'/>
> </os>
> <features>
> <acpi/>
> <apic/>
> <pae/>
> </features>
> <clock offset='utc'/>
> <on_poweroff>destroy</on_poweroff>
> <on_reboot>restart</on_reboot>
> <on_crash>restart</on_crash>
> <devices>
> <emulator>/usr/libexec/qemu-kvm</emulator>
> <disk type='file' device='disk'>
> <driver name='qemu' type='raw' cache='none'/>
> <source file='/cm/shared/vm/vm004.img'/>
> <target dev='hda' bus='ide'/>
> <address type='drive' controller='0' bus='0' target='0' unit='0'/>
> </disk>
> <disk type='block' device='cdrom'>
> <driver name='qemu' type='raw'/>
> <target dev='hdc' bus='ide'/>
> <readonly/>
> <address type='drive' controller='0' bus='1' target='0' unit='0'/>
> </disk>
> <controller type='usb' index='0'>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x2'/>
> </controller>
> <controller type='ide' index='0'>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x1'/>
> </controller>
> <interface type='bridge'>
> <mac address='00:00:00:00:00:0d'/>
> <source bridge='br0'/>
> <model type='rtl8139'/>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
> function='0x0'/>
> </interface>
> <serial type='pty'>
> <target port='0'/>
> </serial>
> <console type='pty'>
> <target type='serial' port='0'/>
> </console>
> <input type='mouse' bus='ps2'/>
> <graphics type='vnc' port='-1' autoport='yes'/>
> <video>
> <model type='cirrus' vram='9216' heads='1'/>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x0'/>
> </video>
> <memballoon model='virtio'>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
> function='0x0'/>
> </memballoon>
> </devices>
> </domain>
>
>
>
> _______________________________________________
> libvirt-users mailing list
> libvirt-users@redhat.com
> https://www.redhat.com/mailman/listinfo/libvirt-users
# This is the Cluster Manager PXE configuration file.
#
# Note that every boot option should specify 'IPAPPEND 3', otherwise the
# ramdisk will fail.
#
# An optional kernel parameter 'INSTALLMODE' can be used to force a certain
# installmode.
#
# The CMDaemon will generate additional kernel parameters (if configured)
# and insert them between the CMDS rdblacklist=nouveau CMDE markers.
#
# There is also a possibility to try and boot the next device in the BIOS
# boot order. It can be specified as:
#
# LABEL disk
# localboot 0
# MENU LABEL ^BOOT - Boot next device in BIOS boot order.
#
# End of documentation, configuration follows:
LABEL linux
KERNEL vmlinuz
IPAPPEND 3
APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE
MENU LABEL ^AUTO - Normal node boot
MENU DEFAULT
LABEL full
KERNEL vmlinuz
IPAPPEND 3
APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE INSTALLMODE=FULL
CANCELBURN=1
MENU LABEL ^FULL - Force FULL install (cancels burn)
MENU HIDE
LABEL main
KERNEL vmlinuz
IPAPPEND 3
APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE INSTALLMODE=MAIN
CANCELBURN=1
MENU LABEL MA^IN - Drop to maintenance shell
LABEL newburn
KERNEL vmlinuz
IPAPPEND 3
APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE NEWBURN=1
MENU LABEL NEW^BURN - Force a new burn
MENU HIDE
LABEL manburn
KERNEL vmlinuz
IPAPPEND 3
APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE NEWBURN=1 BURNMENUPAUSE=1
MENU LABEL ^MANBURN - Force a new burn (no menu timeout)
MENU HIDE
LABEL cancelburn
KERNEL vmlinuz
IPAPPEND 3
APPEND initrd=initrd CMDS rdblacklist=nouveau CMDE CANCELBURN=1
MENU LABEL ^CANCELBURN - Cancel the current burn
MENU HIDE
LABEL RESCUE
KERNEL kernel.rescue
MENU LABEL ^RESCUE - Start rescue environment
APPEND vga=normal initrd=rescue.rootfs.cgz root=/dev/ram0 rw nokeymap
LABEL localdrive
MENU LABEL ^DRIVE - Boot from first hard drive
KERNEL chain.c32
APPEND hd0
LABEL MEMTEST
KERNEL memtest
MENU LABEL MEM^TEST - Start Memtest86
LABEL MEMPLUS
KERNEL memtestplus
MENU LABEL MEM^PLUS - Start Memtest86+
INCLUDE bios/menu.conf
INCLUDE mpxe/minstall.conf
DEFAULT menu.c32
PROMPT 0
TIMEOUT 50
MENU TITLE Cluster Manager PXE Environment
MENU BACKGROUND bootlogo.png
MENU COLOR sel 7;37;40 #ff94cc31 #ff303030 all
MENU COLOR hotsel 1;7;37;40 #ff94cc31 #ff303030 all
MENU COLOR unsel 37;44 #ff78af00 #00000000 std
MENU COLOR hotkey 1;37;44 #ff94cc31 #00000000 std
MENU COLOR border 30;44 #ff78af00 #00000000 std
MENU COLOR title 1;36;44 #ff78af00 #00000000 std
MENU COLOR tabmsg 31;40 #ff78af00 #00000000 std
[root@node002 ~]# tcpdump -vv -i br0 udp
tcpdump: listening on br0, link-type EN10MB (Ethernet), capture size 65535 bytes
17:39:24.212593 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP
(17), length 415)
0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request
from 00:00:00:00:00:0d (oui Ethernet), length 387, xid 0xd, Flags [none]
(0x0000)
Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
GUID Option 97, length 17:
0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
T175 Option 175, length 45:
177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
DHCP-Message Option 53, length 1: Discover
MSZ Option 57, length 2: 1472
ARCH Option 93, length 2: 0
NDI Option 94, length 3: 1.2.1
Vendor-Class Option 60, length 32:
"PXEClient:Arch:00000:UNDI:002001"
CLASS Option 77, length 4: "gPXE"
Parameter-Request Option 55, length 13:
Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
Hostname, Domain-Name, RP, Vendor-Option
Vendor-Class, TFTP, BF, Option 175
Option 203
17:39:24.212659 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP
(17), length 415)
0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request
from 00:00:00:00:00:0d (oui Ethernet), length 387, xid 0xd, Flags [none]
(0x0000)
Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
GUID Option 97, length 17:
0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
T175 Option 175, length 45:
177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
DHCP-Message Option 53, length 1: Discover
MSZ Option 57, length 2: 1472
ARCH Option 93, length 2: 0
NDI Option 94, length 3: 1.2.1
Vendor-Class Option 60, length 32:
"PXEClient:Arch:00000:UNDI:002001"
CLASS Option 77, length 4: "gPXE"
Parameter-Request Option 55, length 13:
Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
Hostname, Domain-Name, RP, Vendor-Option
Vendor-Class, TFTP, BF, Option 175
Option 203
17:39:24.212913 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP
(17), length 388)
master.cm.cluster.bootps > 255.255.255.255.bootpc: [udp sum ok] BOOTP/DHCP,
Reply, length 360, xid 0xd, Flags [none] (0x0000)
Your-IP vm001.cm.cluster
Server-IP master.cm.cluster
Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
file "cm-images/default-image/boot/pxelinux.0"
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Offer
Server-ID Option 54, length 4: master.cm.cluster
Lease-Time Option 51, length 4: 86400
Subnet-Mask Option 1, length 4: 255.255.0.0
Default-Gateway Option 3, length 4: master.cm.cluster
Domain-Name-Server Option 6, length 4: master.cm.cluster
Hostname Option 12, length 17: "vm001.internalnet"
Domain-Name Option 15, length 65: "eth.cluster brightcomputing.com
ib.cluster ilo.cluster cm.cluster"
17:39:25.178728 IP (tos 0x0, ttl 64, id 2, offset 0, flags [none], proto UDP
(17), length 415)
0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request
from 00:00:00:00:00:0d (oui Ethernet), length 387, xid 0xd, Flags [none]
(0x0000)
Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
GUID Option 97, length 17:
0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
T175 Option 175, length 45:
177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
DHCP-Message Option 53, length 1: Discover
MSZ Option 57, length 2: 1472
ARCH Option 93, length 2: 0
NDI Option 94, length 3: 1.2.1
Vendor-Class Option 60, length 32:
"PXEClient:Arch:00000:UNDI:002001"
CLASS Option 77, length 4: "gPXE"
Parameter-Request Option 55, length 13:
Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
Hostname, Domain-Name, RP, Vendor-Option
Vendor-Class, TFTP, BF, Option 175
Option 203
17:39:25.178784 IP (tos 0x0, ttl 64, id 2, offset 0, flags [none], proto UDP
(17), length 415)
0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request
from 00:00:00:00:00:0d (oui Ethernet), length 387, xid 0xd, Flags [none]
(0x0000)
Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
GUID Option 97, length 17:
0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
T175 Option 175, length 45:
177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
DHCP-Message Option 53, length 1: Discover
MSZ Option 57, length 2: 1472
ARCH Option 93, length 2: 0
NDI Option 94, length 3: 1.2.1
Vendor-Class Option 60, length 32:
"PXEClient:Arch:00000:UNDI:002001"
CLASS Option 77, length 4: "gPXE"
Parameter-Request Option 55, length 13:
Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
Hostname, Domain-Name, RP, Vendor-Option
Vendor-Class, TFTP, BF, Option 175
Option 203
17:39:25.179009 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP
(17), length 388)
master.cm.cluster.bootps > 255.255.255.255.bootpc: [udp sum ok] BOOTP/DHCP,
Reply, length 360, xid 0xd, Flags [none] (0x0000)
Your-IP vm001.cm.cluster
Server-IP master.cm.cluster
Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
file "cm-images/default-image/boot/pxelinux.0"
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Offer
Server-ID Option 54, length 4: master.cm.cluster
Lease-Time Option 51, length 4: 86400
Subnet-Mask Option 1, length 4: 255.255.0.0
Default-Gateway Option 3, length 4: master.cm.cluster
Domain-Name-Server Option 6, length 4: master.cm.cluster
Hostname Option 12, length 17: "vm001.internalnet"
Domain-Name Option 15, length 65: "eth.cluster brightcomputing.com
ib.cluster ilo.cluster cm.cluster"
17:39:27.156065 IP (tos 0x0, ttl 64, id 3, offset 0, flags [none], proto UDP
(17), length 427)
0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request
from 00:00:00:00:00:0d (oui Ethernet), length 399, xid 0xd, Flags [none]
(0x0000)
Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
Requested-IP Option 50, length 4: vm001.cm.cluster
Server-ID Option 54, length 4: master.cm.cluster
GUID Option 97, length 17:
0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
T175 Option 175, length 45:
177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
DHCP-Message Option 53, length 1: Request
MSZ Option 57, length 2: 1472
ARCH Option 93, length 2: 0
NDI Option 94, length 3: 1.2.1
Vendor-Class Option 60, length 32:
"PXEClient:Arch:00000:UNDI:002001"
CLASS Option 77, length 4: "gPXE"
Parameter-Request Option 55, length 13:
Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
Hostname, Domain-Name, RP, Vendor-Option
Vendor-Class, TFTP, BF, Option 175
Option 203
17:39:27.156121 IP (tos 0x0, ttl 64, id 3, offset 0, flags [none], proto UDP
(17), length 427)
0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request
from 00:00:00:00:00:0d (oui Ethernet), length 399, xid 0xd, Flags [none]
(0x0000)
Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
Requested-IP Option 50, length 4: vm001.cm.cluster
Server-ID Option 54, length 4: master.cm.cluster
GUID Option 97, length 17:
0.79.3.176.155.232.52.187.243.166.194.22.137.243.21.110.242
Client-ID Option 61, length 7: ether 00:00:00:00:00:0d
T175 Option 175, length 45:
177.5.1.16.236.129.57.19.1.1.23.1.1.21.1.1.24.1.1.35.1.1.34.1.1.25.1.1.33.1.1.16.1.2.18.1.1.17.1.1.235.3.0.9.7
DHCP-Message Option 53, length 1: Request
MSZ Option 57, length 2: 1472
ARCH Option 93, length 2: 0
NDI Option 94, length 3: 1.2.1
Vendor-Class Option 60, length 32:
"PXEClient:Arch:00000:UNDI:002001"
CLASS Option 77, length 4: "gPXE"
Parameter-Request Option 55, length 13:
Subnet-Mask, Default-Gateway, Domain-Name-Server, LOG
Hostname, Domain-Name, RP, Vendor-Option
Vendor-Class, TFTP, BF, Option 175
Option 203
17:39:27.156373 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP
(17), length 388)
master.cm.cluster.bootps > 255.255.255.255.bootpc: [udp sum ok] BOOTP/DHCP,
Reply, length 360, xid 0xd, Flags [none] (0x0000)
Your-IP vm001.cm.cluster
Server-IP master.cm.cluster
Client-Ethernet-Address 00:00:00:00:00:0d (oui Ethernet)
file "cm-images/default-image/boot/pxelinux.0"
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: ACK
Server-ID Option 54, length 4: master.cm.cluster
Lease-Time Option 51, length 4: 86400
Subnet-Mask Option 1, length 4: 255.255.0.0
Default-Gateway Option 3, length 4: master.cm.cluster
Domain-Name-Server Option 6, length 4: master.cm.cluster
Hostname Option 12, length 17: "vm001.internalnet"
Domain-Name Option 15, length 65: "eth.cluster brightcomputing.com
ib.cluster ilo.cluster cm.cluster"
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