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Client:


Client config on QFX 
set interfaces xe-0/0/2 unit 0 family inet dhcp vendor-id Juniper-qfx10002-72q



DHCP Relay:


DHCP relay on QFX 
set routing-instances vrouter1 instance-type virtual-router
set routing-instances vrouter1 interface xe-0/0/0.0
set routing-instances vrouter1 interface xe-0/0/2.0
set routing-instances vrouter1 forwarding-options dhcp-relay server-group relaygrp 10.120.35.110
set routing-instances vrouter1 forwarding-options dhcp-relay active-server-group relaygrp
set routing-instances vrouter1 forwarding-options dhcp-relay group toclient interface xe-0/0/0.0

vagrant@vqfx2> show dhcp relay binding routing-instance vrouter1 detail

Client IP Address:  9.9.9.100
     Hardware Address:             02:05:86:71:95:0b
     State:                        BOUND(RELAY_STATE_BOUND)
     Lease Expires:                2018-09-20 15:26:00 UTC
     Lease Expires in:             86244 seconds
     Lease Start:                  2018-09-19 15:26:00 UTC
     Last Packet Received:         2018-09-19 15:26:00 UTC
     Incoming Client Interface:    xe-0/0/0.0
     Server Ip Address:            10.120.35.110
     Server Interface:             none
     Bootp Relay Address:          9.9.9.1
     Session Id:                   1



vagrant@vqfx2> show dhcp relay statistics routing-instance vrouter1
Packets dropped:
    Total                      0

Messages received:
    BOOTREQUEST                2
    DHCPDECLINE                0
    DHCPDISCOVER               1
    DHCPINFORM                 0
    DHCPRELEASE                0
    DHCPREQUEST                1
    DHCPLEASEACTIVE            0
    DHCPLEASEUNASSIGNED        0
    DHCPLEASEUNKNOWN           0
    DHCPLEASEQUERYDONE         0

Messages sent:
    BOOTREPLY                  2
    DHCPOFFER                  1
    DHCPACK                    1
    DHCPNAK                    0
    DHCPFORCERENEW             0
    DHCPLEASEQUERY             0
    DHCPBULKLEASEQUERY         0


Server:


dhcp server config on QFX 
set interfaces xe-0/0/1 unit 0 family inet address 10.120.35.110/24

set routing-instances dhcpserv_ri description "local dhcp server vrouter"
set routing-instances dhcpserv_ri instance-type virtual-router
set routing-instances dhcpserv_ri system services dhcp-local-server group g1 interface xe-0/0/1.0
set routing-instances dhcpserv_ri access address-assignment pool p1 family inet network 9.9.9.0/24
set routing-instances dhcpserv_ri access address-assignment pool p1 family inet range r1 low 9.9.9.100
set routing-instances dhcpserv_ri access address-assignment pool p1 family inet range r1 high 9.9.9.200
set routing-instances dhcpserv_ri access address-assignment pool p1 family inet dhcp-attributes name-server 9.9.9.1
set routing-instances dhcpserv_ri interface xe-0/0/1.0
set routing-instances dhcpserv_ri routing-options static route 9.9.9.0/24 next-hop 10.120.35.1


vagrant@vqfx3> show dhcp server binding routing-instance dhcpserv_ri detail

Client IP Address:  9.9.9.100
     Hardware Address:             02:05:86:71:95:0b
     State:                        BOUND(LOCAL_SERVER_STATE_BOUND)
     Protocol-Used:                DHCP
     Lease Expires:                2018-09-20 15:26:02 UTC
     Lease Expires in:             86178 seconds
     Lease Start:                  2018-09-19 15:26:01 UTC
     Last Packet Received:         2018-09-19 15:26:02 UTC
     Incoming Client Interface:    xe-0/0/1.0
     Server Identifier:            10.120.35.110
     Bootp Relay Address:          9.9.9.1
     Session Id:                   1
     Client Pool Name:             p1



vagrant@vqfx3> show dhcp server stati routing-instance dhcpserv_ri
Packets dropped:
    Total                      0

Offer Delay:
    DELAYED                    0
    INPROGRESS                 0
    TOTAL                      0

Messages received:
    BOOTREQUEST                2
    DHCPDECLINE                0
    DHCPDISCOVER               1
    DHCPINFORM                 0
    DHCPRELEASE                0
    DHCPREQUEST                1
    DHCPLEASEQUERY             0
    DHCPBULKLEASEQUERY         0

Messages sent:
    BOOTREPLY                  2
    DHCPOFFER                  1
    DHCPACK                    1
    DHCPNAK                    0
    DHCPFORCERENEW             0
    DHCPLEASEUNASSIGNED        0
    DHCPLEASEUNKNOWN           0
    DHCPLEASEACTIVE            0
    DHCPLEASEQUERYDONE         0
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