Ask Your Question

Revision history [back]

Forced to use answer field , because need formatting.
Usualy tap interface is given by command

[root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
13: tap7a12f9b0-a4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
    link/ether fa:16:3e:29:fe:f1 brd ff:ff:ff:ff:ff:ff
    inet 50.0.0.11/24 brd 50.0.0.255 scope global tap7a12f9b0-a4
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fe29:fef1/64 scope link 
       valid_lft forever preferred_lft forever

Correspondent tcpdump capturing would look like:-

[root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 tcpdump -ln -i tap7a12f9b0-a4

Could you also enable dnsmasq logging and upload somewhere corresponding dnsmasq.log ? How to enable dnsmasq logging view http://bderzhavets.blogspot.com/2014/01/setting-up-two-physical-node-openstack.html
4. Updated dhcp_agent.ini and dnsmasq.conf to assign internal IP for instance.

dnsmasq.log

Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPREQUEST(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 tags: tag0, known, tap7a12f9b0-a4 Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPACK(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a host-50-0-0-32 Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route, Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 15:domain-name, 6:dns-server, 12:hostname, Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server, Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 26:mtu, 119:domain-search, 3:router, 121:classless-static-route, Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 249, 33:static-route, 252, 42:ntp-server Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 next server: 50.0.0.11 Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 1 option: 53 message-type 5 Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 4 option: 54 server-identifier 50.0.0.11 Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 4 option: 51 lease-time 1d Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 4 option: 58 T1 12h Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 4 option: 59 T2 21h Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 4 option: 1 netmask 255.255.255.0 Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 4 option: 28 broadcast 50.0.0.255 Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 15 domain-name openstacklocal Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 12 hostname host-50-0-0-32 Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 4 option: 3 router 50.0.0.1 Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 4 option: 6 dns-server 83.221.202.254

Forced to use answer field , because need formatting.
Usualy tap interface is given by command

[root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
13: tap7a12f9b0-a4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
    link/ether fa:16:3e:29:fe:f1 brd ff:ff:ff:ff:ff:ff
    inet 50.0.0.11/24 brd 50.0.0.255 scope global tap7a12f9b0-a4
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fe29:fef1/64 scope link 
       valid_lft forever preferred_lft forever

Correspondent tcpdump capturing would look like:-

[root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 tcpdump -ln -i tap7a12f9b0-a4

tap7a12f9b0-a4

Could you also enable dnsmasq logging and upload somewhere corresponding dnsmasq.log ? How to enable dnsmasq logging view http://bderzhavets.blogspot.com/2014/01/setting-up-two-physical-node-openstack.html
4. Updated dhcp_agent.ini and dnsmasq.conf to assign internal IP for instance.

dnsmasq.log

Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPREQUEST(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 tags: tag0, known, tap7a12f9b0-a4
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPACK(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 15:domain-name, 6:dns-server, 12:hostname,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 26:mtu, 119:domain-search, 3:router, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 249, 33:static-route, 252, 42:ntp-server
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 next server: 50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  1 option: 53 message-type  5
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 54 server-identifier  50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 51 lease-time  1d
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 58 T1  12h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 59 T2  21h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  1 netmask  255.255.255.0
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 28 broadcast  50.0.0.255
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 15 domain-name  openstacklocal
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 12 hostname  host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  3 router  50.0.0.1
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  6 dns-server  83.221.202.254

83.221.202.254

Forced to use answer field , because need formatting.
Usualy tap interface is given by command

[root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
13: tap7a12f9b0-a4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
    link/ether fa:16:3e:29:fe:f1 brd ff:ff:ff:ff:ff:ff
    inet 50.0.0.11/24 brd 50.0.0.255 scope global tap7a12f9b0-a4
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fe29:fef1/64 scope link 
       valid_lft forever preferred_lft forever

Correspondent tcpdump capturing would look like:-

 [root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 tcpdump -ln -i tap7a12f9b0-a4
........
18:43:31.127181 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:bb:67:1a, length 300
18:43:31.127751 IP 50.0.0.11.bootps > 50.0.0.32.bootpc: BOOTP/DHCP, Reply, length 324
18:43:31.151226 IP 50.0.0.32 > 224.0.0.22: igmp v3 report, 1 group record(s)
18:43:31.399526 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0 [4q] [7n] ANY (QM)? a.1.7.6.b.b.e.f.f.f.e.3.6.1.8.f.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. ANY (QM)? vf20rsx1511.local. ANY (QM)? 32.0.0.50.in-addr.arpa. ANY (QM)? vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (323)
18:43:31.449740 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0*- [0q] 2/0/0 PTR _workstation._tcp.local., PTR vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (118)

Could you also enable dnsmasq logging and upload somewhere corresponding dnsmasq.log ? How to enable dnsmasq logging view http://bderzhavets.blogspot.com/2014/01/setting-up-two-physical-node-openstack.html
4. Updated dhcp_agent.ini and dnsmasq.conf to assign internal IP for instance.

dnsmasq.log

Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPREQUEST(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 tags: tag0, known, tap7a12f9b0-a4
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPACK(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 15:domain-name, 6:dns-server, 12:hostname,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 26:mtu, 119:domain-search, 3:router, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 249, 33:static-route, 252, 42:ntp-server
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 next server: 50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  1 option: 53 message-type  5
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 54 server-identifier  50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 51 lease-time  1d
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 58 T1  12h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 59 T2  21h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  1 netmask  255.255.255.0
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 28 broadcast  50.0.0.255
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 15 domain-name  openstacklocal
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 12 hostname  host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  3 router  50.0.0.1
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  6 dns-server  83.221.202.254

Forced to use answer field , because need formatting.
Usualy

Run : [root@juno1 ~(keystone_admin)]# neutron net-list
Select yours private-net-id
[root@juno1 ~(keystone_admin)]# ip netns | grep  private-net-id
Say it is qdhcp-45577666-657d-4f75-a3ab-9bc232f15203
Usually tap interface is given by command 

 [root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 ip addr show
 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
     inet 127.0.0.1/8 scope host lo
        valid_lft forever preferred_lft forever
     inet6 ::1/128 scope host 
        valid_lft forever preferred_lft forever
 13: tap7a12f9b0-a4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
     link/ether fa:16:3e:29:fe:f1 brd ff:ff:ff:ff:ff:ff
     inet 50.0.0.11/24 brd 50.0.0.255 scope global tap7a12f9b0-a4
        valid_lft forever preferred_lft forever
     inet6 fe80::f816:3eff:fe29:fef1/64 scope link 
        valid_lft forever preferred_lft forever

Correspondent tcpdump capturing would look like:-

 [root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 tcpdump -ln -i tap7a12f9b0-a4
........
18:43:31.127181 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:bb:67:1a, length 300
18:43:31.127751 IP 50.0.0.11.bootps > 50.0.0.32.bootpc: BOOTP/DHCP, Reply, length 324
18:43:31.151226 IP 50.0.0.32 > 224.0.0.22: igmp v3 report, 1 group record(s)
18:43:31.399526 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0 [4q] [7n] ANY (QM)? a.1.7.6.b.b.e.f.f.f.e.3.6.1.8.f.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. ANY (QM)? vf20rsx1511.local. ANY (QM)? 32.0.0.50.in-addr.arpa. ANY (QM)? vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (323)
18:43:31.449740 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0*- [0q] 2/0/0 PTR _workstation._tcp.local., PTR vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (118)

Could you also enable dnsmasq logging and upload somewhere corresponding dnsmasq.log ? How to enable dnsmasq logging view http://bderzhavets.blogspot.com/2014/01/setting-up-two-physical-node-openstack.html
4. Updated dhcp_agent.ini and dnsmasq.conf to assign internal IP for instance.

dnsmasq.log

Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPREQUEST(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 tags: tag0, known, tap7a12f9b0-a4
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPACK(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 15:domain-name, 6:dns-server, 12:hostname,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 26:mtu, 119:domain-search, 3:router, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 249, 33:static-route, 252, 42:ntp-server
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 next server: 50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  1 option: 53 message-type  5
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 54 server-identifier  50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 51 lease-time  1d
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 58 T1  12h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 59 T2  21h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  1 netmask  255.255.255.0
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 28 broadcast  50.0.0.255
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 15 domain-name  openstacklocal
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 12 hostname  host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  3 router  50.0.0.1
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  6 dns-server  83.221.202.254

Forced to use answer field , because need formatting.

Run : [root@juno1 ~(keystone_admin)]# neutron net-list
Select yours private-net-id
[root@juno1 ~(keystone_admin)]# ip netns | grep  private-net-id
Say it is qdhcp-45577666-657d-4f75-a3ab-9bc232f15203
Usually tap interface is given by command 
[root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 ip addr show
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    13: tap7a12f9b0-a4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
        link/ether fa:16:3e:29:fe:f1 brd ff:ff:ff:ff:ff:ff
        inet 50.0.0.11/24 brd 50.0.0.255 scope global tap7a12f9b0-a4
           valid_lft forever preferred_lft forever
        inet6 fe80::f816:3eff:fe29:fef1/64 scope link 
           valid_lft forever preferred_lft forever

Correspondent tcpdump capturing would look like:-

 [root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 tcpdump -ln -i tap7a12f9b0-a4
........
18:43:31.127181 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:bb:67:1a, length 300
18:43:31.127751 IP 50.0.0.11.bootps > 50.0.0.32.bootpc: BOOTP/DHCP, Reply, length 324
18:43:31.151226 IP 50.0.0.32 > 224.0.0.22: igmp v3 report, 1 group record(s)
18:43:31.399526 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0 [4q] [7n] ANY (QM)? a.1.7.6.b.b.e.f.f.f.e.3.6.1.8.f.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. ANY (QM)? vf20rsx1511.local. ANY (QM)? 32.0.0.50.in-addr.arpa. ANY (QM)? vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (323)
18:43:31.449740 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0*- [0q] 2/0/0 PTR _workstation._tcp.local., PTR vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (118)

Could you Enable also enable dnsmasq logging and upload somewhere corresponding dnsmasq.log ? How to enable dnsmasq logging view http://bderzhavets.blogspot.com/2014/01/setting-up-two-physical-node-openstack.html
View section - 4. Updated dhcp_agent.ini and dnsmasq.conf to assign internal IP for instance.

dnsmasq.log

Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPREQUEST(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 tags: tag0, known, tap7a12f9b0-a4
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPACK(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 15:domain-name, 6:dns-server, 12:hostname,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 26:mtu, 119:domain-search, 3:router, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 249, 33:static-route, 252, 42:ntp-server
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 next server: 50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  1 option: 53 message-type  5
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 54 server-identifier  50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 51 lease-time  1d
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 58 T1  12h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 59 T2  21h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  1 netmask  255.255.255.0
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 28 broadcast  50.0.0.255
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 15 domain-name  openstacklocal
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 12 hostname  host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  3 router  50.0.0.1
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  6 dns-server  83.221.202.254

Forced to use answer field , because need formatting.

Run : [root@juno1 ~(keystone_admin)]# neutron net-list
Select yours private-net-id
[root@juno1 ~(keystone_admin)]# ip netns | grep  private-net-id
Say it is qdhcp-45577666-657d-4f75-a3ab-9bc232f15203
Usually tap interface is given by command 
[root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 ip addr show
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    13: tap7a12f9b0-a4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
        link/ether fa:16:3e:29:fe:f1 brd ff:ff:ff:ff:ff:ff
        inet 50.0.0.11/24 brd 50.0.0.255 scope global tap7a12f9b0-a4
           valid_lft forever preferred_lft forever
        inet6 fe80::f816:3eff:fe29:fef1/64 scope link 
           valid_lft forever preferred_lft forever

Correspondent tcpdump capturing would look like:-

 [root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 tcpdump -ln -i tap7a12f9b0-a4
........
18:43:31.127181 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:bb:67:1a, length 300
18:43:31.127751 IP 50.0.0.11.bootps > 50.0.0.32.bootpc: BOOTP/DHCP, Reply, length 324
18:43:31.151226 IP 50.0.0.32 > 224.0.0.22: igmp v3 report, 1 group record(s)
18:43:31.399526 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0 [4q] [7n] ANY (QM)? a.1.7.6.b.b.e.f.f.f.e.3.6.1.8.f.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. ANY (QM)? vf20rsx1511.local. ANY (QM)? 32.0.0.50.in-addr.arpa. ANY (QM)? vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (323)
18:43:31.449740 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0*- [0q] 2/0/0 PTR _workstation._tcp.local., PTR vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (118)

Enable also dnsmasq logging and upload somewhere corresponding dnsmasq.log ? How .

Add line
dnsmasq_config_file = /etc/neutron/dnsmasq.conf
to enable dnsmasq logging view http://bderzhavets.blogspot.com/2014/01/setting-up-two-physical-node-openstack.html
View section - 4. Updated
dhcp_agent.ini and dnsmasq.conf to assign internal IP for instance.

&& create file /etc/neutron/dnsmasq.cof log-facility = /var/log/neutron/dnsmasq.log log-dhcp

dnsmasq.log

Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPREQUEST(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 tags: tag0, known, tap7a12f9b0-a4
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPACK(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 15:domain-name, 6:dns-server, 12:hostname,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 26:mtu, 119:domain-search, 3:router, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 249, 33:static-route, 252, 42:ntp-server
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 next server: 50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  1 option: 53 message-type  5
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 54 server-identifier  50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 51 lease-time  1d
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 58 T1  12h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 59 T2  21h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  1 netmask  255.255.255.0
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 28 broadcast  50.0.0.255
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 15 domain-name  openstacklocal
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 12 hostname  host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  3 router  50.0.0.1
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  6 dns-server  83.221.202.254

Forced to use answer field , because need formatting.

Run : [root@juno1 ~(keystone_admin)]# neutron net-list
Select yours private-net-id
[root@juno1 ~(keystone_admin)]# ip netns | grep  private-net-id
Say it is qdhcp-45577666-657d-4f75-a3ab-9bc232f15203
Usually tap interface is given by command 
[root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 ip addr show
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    13: tap7a12f9b0-a4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
        link/ether fa:16:3e:29:fe:f1 brd ff:ff:ff:ff:ff:ff
        inet 50.0.0.11/24 brd 50.0.0.255 scope global tap7a12f9b0-a4
           valid_lft forever preferred_lft forever
        inet6 fe80::f816:3eff:fe29:fef1/64 scope link 
           valid_lft forever preferred_lft forever

Correspondent tcpdump capturing would should look like:-

 [root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 tcpdump -ln -i tap7a12f9b0-a4
........
18:43:31.127181 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:bb:67:1a, length 300
18:43:31.127751 IP 50.0.0.11.bootps > 50.0.0.32.bootpc: BOOTP/DHCP, Reply, length 324
18:43:31.151226 IP 50.0.0.32 > 224.0.0.22: igmp v3 report, 1 group record(s)
18:43:31.399526 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0 [4q] [7n] ANY (QM)? a.1.7.6.b.b.e.f.f.f.e.3.6.1.8.f.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. ANY (QM)? vf20rsx1511.local. ANY (QM)? 32.0.0.50.in-addr.arpa. ANY (QM)? vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (323)
18:43:31.449740 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0*- [0q] 2/0/0 PTR _workstation._tcp.local., PTR vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (118)

Enable also dnsmasq logging and upload somewhere corresponding dnsmasq.log .

Add line
dnsmasq_config_file = /etc/neutron/dnsmasq.conf
to dhcp_agent.ini  && create file /etc/neutron/dnsmasq.cof
log-facility = /var/log/neutron/dnsmasq.log
log-dhcp

dnsmasq.log

Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPREQUEST(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 tags: tag0, known, tap7a12f9b0-a4
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPACK(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 15:domain-name, 6:dns-server, 12:hostname,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 26:mtu, 119:domain-search, 3:router, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 249, 33:static-route, 252, 42:ntp-server
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 next server: 50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  1 option: 53 message-type  5
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 54 server-identifier  50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 51 lease-time  1d
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 58 T1  12h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 59 T2  21h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  1 netmask  255.255.255.0
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 28 broadcast  50.0.0.255
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 15 domain-name  openstacklocal
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 12 hostname  host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  3 router  50.0.0.1
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  6 dns-server  83.221.202.254

Forced to use answer field , because need formatting.

Run : [root@juno1 ~(keystone_admin)]# neutron net-list
Select yours private-net-id
[root@juno1 ~(keystone_admin)]# ip netns | grep  private-net-id
Say it is qdhcp-45577666-657d-4f75-a3ab-9bc232f15203
Usually tap interface is given by command 
[root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 ip addr show
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    13: tap7a12f9b0-a4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN 
        link/ether fa:16:3e:29:fe:f1 brd ff:ff:ff:ff:ff:ff
        inet 50.0.0.11/24 brd 50.0.0.255 scope global tap7a12f9b0-a4
           valid_lft forever preferred_lft forever
        inet6 fe80::f816:3eff:fe29:fef1/64 scope link 
           valid_lft forever preferred_lft forever

Correspondent tcpdump capturing should look like:-

 [root@juno1 ~(keystone_admin)]# ip netns exec qdhcp-45577666-657d-4f75-a3ab-9bc232f15203 tcpdump -ln -i tap7a12f9b0-a4
........
18:43:31.127181 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:bb:67:1a, length 300
18:43:31.127751 IP 50.0.0.11.bootps > 50.0.0.32.bootpc: BOOTP/DHCP, Reply, length 324
18:43:31.151226 IP 50.0.0.32 > 224.0.0.22: igmp v3 report, 1 group record(s)
18:43:31.399526 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0 [4q] [7n] ANY (QM)? a.1.7.6.b.b.e.f.f.f.e.3.6.1.8.f.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. ANY (QM)? vf20rsx1511.local. ANY (QM)? 32.0.0.50.in-addr.arpa. ANY (QM)? vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (323)
18:43:31.449740 IP 50.0.0.32.mdns > 224.0.0.251.mdns: 0*- [0q] 2/0/0 PTR _workstation._tcp.local., PTR vf20rsx1511 [fa:16:3e:bb:67:1a]._workstation._tcp.local. (118)

Enable also dnsmasq logging and upload somewhere corresponding dnsmasq.log .

Add line
dnsmasq_config_file = /etc/neutron/dnsmasq.conf
to dhcp_agent.ini  && create file /etc/neutron/dnsmasq.cof
/etc/neutron/dnsmasq.conf
log-facility = /var/log/neutron/dnsmasq.log
log-dhcp

dnsmasq.log

Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPREQUEST(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 tags: tag0, known, tap7a12f9b0-a4
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 DHCPACK(tap7a12f9b0-a4) 50.0.0.32 fa:16:3e:bb:67:1a host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 1:netmask, 28:broadcast, 2:time-offset, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 15:domain-name, 6:dns-server, 12:hostname,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 40:nis-domain, 41:nis-server, 42:ntp-server,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 26:mtu, 119:domain-search, 3:router, 121:classless-static-route,
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 requested options: 249, 33:static-route, 252, 42:ntp-server
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 next server: 50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  1 option: 53 message-type  5
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 54 server-identifier  50.0.0.11
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 51 lease-time  1d
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 58 T1  12h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 59 T2  21h
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  1 netmask  255.255.255.0
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option: 28 broadcast  50.0.0.255
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 15 domain-name  openstacklocal
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size: 14 option: 12 hostname  host-50-0-0-32
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  3 router  50.0.0.1
Nov 19 18:43:31 dnsmasq-dhcp[5772]: 3802579461 sent size:  4 option:  6 dns-server  83.221.202.254