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https://issues.apache.org/jira/browse/CLOUDSTACK-4132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13738619#comment-13738619
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Bharat Kumar commented on CLOUDSTACK-4132:
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I tried to do some sanity checks after setting the dhcp-client-update flag in
the dnsmasq.config files. following are the observations.
i used dhcpdump uttility to gather this.
without the flag dhcp-client-update
TIME: 2013-08-13 17:58:05.918
IP: 0.0.0.0 (6:cd:b2:0:0:2) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: 8de7bb4b
SECS: 2816
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: 06:cd:b2:00:00:02:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 3 (DHCPREQUEST)
OPTION: 61 ( 7) Client-identifier 01:06:cd:b2:00:00:02
OPTION: 50 ( 4) Request IP address 10.147.33.4
OPTION: 54 ( 4) Server identifier 10.147.33.6
OPTION: 12 ( 15) Host name WIN-MO8J8SHVOJI
OPTION: 81 ( 18) Client FQDN 0-0-0 WIN-MO8J8SHVOJI
OPTION: 60 ( 8) Vendor class identifier MSFT 5.0
OPTION: 55 ( 12) Parameter Request List 1 (Subnet mask)
15 (Domainname)
3 (Routers)
6 (DNS server)
44 (NetBIOS name server)
46 (NetBIOS node type)
47 (NetBIOS scope)
31 (Perform router discovery)
33 (Static route)
121 (Classless Static Route)
249 (MSFT - Classless route)
43 (Vendor specific info)
---------------------------------------------------------------------------
TIME: 2013-08-13 17:58:05.918
IP: 10.147.33.6 (6:20:be:0:0:4) > 10.147.33.4 (6:cd:b2:0:0:2)
OP: 2 (BOOTPREPLY)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: 8de7bb4b
SECS: 2816
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 10.147.33.4
SIADDR: 10.147.33.6
GIADDR: 0.0.0.0
CHADDR: 06:cd:b2:00:00:02:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 5 (DHCPACK)
OPTION: 54 ( 4) Server identifier 10.147.33.6
OPTION: 51 ( 4) IP address leasetime -1 ()
OPTION: 1 ( 4) Subnet mask 255.255.255.128
OPTION: 28 ( 4) Broadcast address 10.147.33.127
OPTION: 81 ( 24) Client FQDN 3-255-255 vm1.cs1cloud.internal
OPTION: 6 ( 8) DNS server 10.147.33.6,10.103.128.16
OPTION: 3 ( 4) Routers 10.147.33.1
OPTION: 15 ( 17) Domainname cs1cloud.internal
OPTION: 43 ( 7) Vendor specific info 020400000001ff .......
OPTION: 60 ( 8) Vendor class identifier MSFT 5.0
*******************************************************************************************
with dhcp-client-update flag added
TIME: 2013-08-13 18:08:35.336
IP: 0.0.0.0 (6:cd:b2:0:0:2) > 255.255.255.255 (ff:ff:ff:ff:ff:ff)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: b49a02fa
SECS: 1024
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: 06:cd:b2:00:00:02:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 3 (DHCPREQUEST)
OPTION: 61 ( 7) Client-identifier 01:06:cd:b2:00:00:02
OPTION: 50 ( 4) Request IP address 10.147.33.4
OPTION: 54 ( 4) Server identifier 10.147.33.6
OPTION: 12 ( 15) Host name WIN-MO8J8SHVOJI
OPTION: 81 ( 18) Client FQDN 0-0-0 WIN-MO8J8SHVOJI
OPTION: 60 ( 8) Vendor class identifier MSFT 5.0
OPTION: 55 ( 12) Parameter Request List 1 (Subnet mask)
15 (Domainname)
3 (Routers)
6 (DNS server)
44 (NetBIOS name server)
46 (NetBIOS node type)
47 (NetBIOS scope)
31 (Perform router discovery)
33 (Static route)
121 (Classless Static Route)
249 (MSFT - Classless route)
43 (Vendor specific info)
---------------------------------------------------------------------------
TIME: 2013-08-13 18:08:35.336
IP: 10.147.33.6 (6:20:be:0:0:4) > 10.147.33.4 (6:cd:b2:0:0:2)
OP: 2 (BOOTPREPLY)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: b49a02fa
SECS: 1024
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 10.147.33.4
SIADDR: 10.147.33.6
GIADDR: 0.0.0.0
CHADDR: 06:cd:b2:00:00:02:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 5 (DHCPACK)
OPTION: 54 ( 4) Server identifier 10.147.33.6
OPTION: 51 ( 4) IP address leasetime -1 ()
OPTION: 1 ( 4) Subnet mask 255.255.255.128
OPTION: 28 ( 4) Broadcast address 10.147.33.127
OPTION: 6 ( 8) DNS server 10.147.33.6,10.103.128.16
OPTION: 3 ( 4) Routers 10.147.33.1
OPTION: 15 ( 17) Domainname cs1cloud.internal
OPTION: 43 ( 7) Vendor specific info 020400000001ff .......
OPTION: 60 ( 8) Vendor class identifier MSFT 5.0
> current dnsmasq config does not allow guest virtual machines(clients) to
> update its hostnames with a DNS server
> ----------------------------------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-4132
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-4132
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Virtual Router
> Affects Versions: 4.2.0
> Reporter: Ram Ganesh
> Assignee: Bharat Kumar
> Priority: Critical
> Fix For: 4.2.0
>
>
> Current dnsmasq.conf does not have "dhcp-client-update" flag enabled thereby
> preventing say Windows clients to update AD servers with its hostname. We
> should enhance the config file to support this. More information about this
> parameter can be found here -
> http://www.thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html
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