Hi,

Net-dump xml File.

root@NFV-FRU:~# virsh net-dumpxml data-2
<network>
<name>data-2</name>
<uuid>ace4935f-0367-4632-be7c-61bab2da7d4a</uuid>
<bridge name='data-2br1' stp='on' delay='0'/>
<mac address='52:54:00:46:43:7d'/>
<ip address='10.12.12.1' netmask='255.255.255.240'>
<dhcp>
<range start='10.12.12.4' end='10.12.12.4'/>
</dhcp>
</ip>
</network>

The DHCP response is going with Subnet Mask 255.255.255.0

10.12.12.1.bootps > 10.12.12.4.bootpc: [udp sum ok] BOOTP/DHCP, Reply, length 300, xid 0x7331d77a, Flags [none] (0x0000)

Your-IP 10.12.12.4

Server-IP 10.12.12.1

Client-Ethernet-Address 52:54:00:5f:ab:94 (oui Unknown)

Vendor-rfc1048 Extensions

Magic Cookie 0x63825363

DHCP-Message Option 53, length 1: Offer

Server-ID Option 54, length 4: 10.12.12.1

Lease-Time Option 51, length 4: 3600

RN Option 58, length 4: 1800

RB Option 59, length 4: 3150

Subnet-Mask Option 1, length 4: 255.255.255.0

BR Option 28, length 4: 10.12.12.255

Domain-Name-Server Option 6, length 4: 10.12.12.1

Can I know the reason ?

Thanks & Regards

Santhosh Kumar Gunturu