Relay
This scenario shows how to configure service dhcp-relay. The
relay agent must be used when the DHCP server and the DHCP
clients are not connected to the same layer 2 domain.
Test DHCP Relay
Description
This example demonstrates how to configure a DHCP relay instance in DUT0 to forward DHCP requests from DUT2 to DUT1.
Scenario
Step 1: Set the following configuration in DUT0 :
set interfaces ethernet eth0 vif 100 address 10.0.0.2/24 set interfaces ethernet eth1 vif 200 address 20.0.0.2/24 set service dhcp-relay INS downstream-interface eth1.200 set service dhcp-relay INS server 10.0.0.1 set service dhcp-relay INS upstream-interface eth0.100 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 2: Set the following configuration in DUT1 :
set interfaces ethernet eth0 vif 100 address 10.0.0.1/24 set protocols static route 0.0.0.0/0 next-hop 10.0.0.2 set service dhcp-server shared-network dummy subnet 10.0.0.1/32 set service dhcp-server shared-network remote subnet 20.0.0.0/24 start 20.0.0.50 stop 20.0.0.50 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 3: Set the following configuration in DUT2 :
set interfaces ethernet eth0 vif 200 address dhcp set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 4: Ping IP address 10.0.0.1 from DUT0:
admin@DUT0$ ping 10.0.0.1 count 1 size 56 timeout 1Show output
PING 10.0.0.1 (10.0.0.1) 56(84) bytes of data. 64 bytes from 10.0.0.1: icmp_seq=1 ttl=64 time=0.228 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.228/0.228/0.228/0.000 ms
Step 5: Run command interfaces ethernet show at DUT2 and check if output contains the following tokens:
20.0.0.50Show output
--------------------------------------------------------------------- Name IP Address Admin Oper Vrf Description --------------------------------------------------------------------- eth0 fe80::dcad:beff:feef:6c20/64 up up eth0.200 20.0.0.50/24 up up fe80::dcad:beff:feef:6c20/64 eth1 down down
Test DHCP Relay With Giaddr
Description
This example demonstrates how to set the gateway IP address (giaddr) in the IP address. This value must be set in an IP address that the DHCP server can reach.
Scenario
Step 1: Set the following configuration in DUT0 :
set interfaces ethernet eth0 vif 100 address 10.0.0.2/24 set interfaces ethernet eth1 vif 200 address 20.0.0.2/24 set interfaces ethernet eth1 vif 200 address 20.0.0.3/24 set service dhcp-relay INS downstream-interface eth1.200 set service dhcp-relay INS server 10.0.0.1 giaddr 20.0.0.3 set service dhcp-relay INS upstream-interface eth0.100 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 2: Set the following configuration in DUT1 :
set interfaces ethernet eth0 vif 100 address 10.0.0.1/24 set protocols static route 0.0.0.0/0 next-hop 10.0.0.2 set service dhcp-server shared-network dummy subnet 10.0.0.1/32 set service dhcp-server shared-network remote subnet 20.0.0.0/24 start 20.0.0.50 stop 20.0.0.50 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 3: Set the following configuration in DUT2 :
set interfaces ethernet eth0 vif 200 address dhcp set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 4: Ping IP address 10.0.0.1 from DUT0:
admin@DUT0$ ping 10.0.0.1 count 1 size 56 timeout 1Show output
PING 10.0.0.1 (10.0.0.1) 56(84) bytes of data. 64 bytes from 10.0.0.1: icmp_seq=1 ttl=64 time=0.229 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.229/0.229/0.229/0.000 ms
Step 5: Run command interfaces ethernet show at DUT2 and check if output contains the following tokens:
20.0.0.50Show output
--------------------------------------------------------------------- Name IP Address Admin Oper Vrf Description --------------------------------------------------------------------- eth0 fe80::dcad:beff:feef:6c20/64 up up eth0.200 20.0.0.50/24 up up fe80::dcad:beff:feef:6c20/64 eth1 down down
Step 6: Run command system journal show | cat at DUT1 and check if output matches the following regular expressions:
DHCPACK on 20.0.0.50 to [^\)]+\) via 20.0.0.3Show output
May 14 10:24:06.279464 osdx systemd-journald[1753]: Runtime Journal (/run/log/journal/899392cd00944cdaa29aa3964bffbd0e) is 1.0M, max 7.2M, 6.2M free. May 14 10:24:06.280132 osdx systemd-journald[1753]: Received client request to rotate journal, rotating. May 14 10:24:06.280173 osdx systemd-journald[1753]: Vacuuming done, freed 0B of archived journals from /run/log/journal/899392cd00944cdaa29aa3964bffbd0e. May 14 10:24:06.288666 osdx OSDxCLI[154664]: User 'admin' executed a new command: 'system journal clear'. May 14 10:24:06.712465 osdx osdx-coredump[250280]: Deleting all coredumps in /opt/vyatta/etc/config/coredump... May 14 10:24:06.720510 osdx OSDxCLI[154664]: User 'admin' executed a new command: 'system coredump delete all'. May 14 10:24:08.166488 osdx OSDxCLI[154664]: User 'admin' entered the configuration menu. May 14 10:24:08.273385 osdx OSDxCLI[154664]: User 'admin' added a new cfg line: 'set interfaces eth0.100 address 10.0.0.1/24'. May 14 10:24:08.333324 osdx OSDxCLI[154664]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network dummy subnet 10.0.0.1/32'. May 14 10:24:08.447534 osdx OSDxCLI[154664]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network remote subnet 20.0.0.0/24 start 20.0.0.50 stop 20.0.0.50'. May 14 10:24:08.517817 osdx OSDxCLI[154664]: User 'admin' added a new cfg line: 'set protocols static route 0.0.0.0/0 next-hop 10.0.0.2'. May 14 10:24:08.600801 osdx OSDxCLI[154664]: User 'admin' added a new cfg line: 'show working'. May 14 10:24:08.698950 osdx ubnt-cfgd[250300]: inactive May 14 10:24:08.729941 osdx INFO[250310]: FRR daemons did not change May 14 10:24:08.788068 osdx kernel: 8021q: adding VLAN 0 to HW filter on device eth0 May 14 10:24:08.812842 osdx (udev-worker)[250361]: Network interface NamePolicy= disabled on kernel command line. May 14 10:24:08.968323 osdx systemd[1]: Started dhcpd@main.service - "DHCP Server Service instance main". May 14 10:24:08.970558 osdx cfgd[1455]: [154664]Completed change to active configuration May 14 10:24:08.983353 osdx OSDxCLI[154664]: User 'admin' committed the configuration. May 14 10:24:08.985871 osdx dhcpd[250427]: Wrote 0 leases to leases file. May 14 10:24:09.011623 osdx OSDxCLI[154664]: User 'admin' left the configuration menu. May 14 10:24:09.022447 osdx dhcpd[250427]: May 14 10:24:09.022452 osdx dhcpd[250427]: No subnet declaration for eth0 (no IPv4 addresses). May 14 10:24:09.022455 osdx dhcpd[250427]: ** Ignoring requests on eth0. If this is not what May 14 10:24:09.022457 osdx dhcpd[250427]: you want, please write a subnet declaration May 14 10:24:09.022459 osdx dhcpd[250427]: in your dhcpd.conf file for the network segment May 14 10:24:09.022461 osdx dhcpd[250427]: to which interface eth0 is attached. ** May 14 10:24:09.022464 osdx dhcpd[250427]: May 14 10:24:09.032134 osdx dhcpd[250427]: Server starting service. May 14 10:24:09.599874 osdx dhcpd[250427]: DHCPDISCOVER from de:ad:be:ef:6c:20 via 20.0.0.3 May 14 10:24:10.610283 osdx dhcpd[250427]: DHCPOFFER on 20.0.0.50 to de:ad:be:ef:6c:20 (osdx) via 20.0.0.3 May 14 10:24:10.610903 osdx dhcpd[250427]: DHCPREQUEST for 20.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:20 (osdx) via 20.0.0.3 May 14 10:24:10.622115 osdx dhcpd[250427]: DHCPACK on 20.0.0.50 to de:ad:be:ef:6c:20 (osdx) via 20.0.0.3
Test DHCP Relay With GRE Tunnel
Description
This example demonstrates how to configure a DHCP relay that forwards DHCP requests to the DHCP server through a GRE tunnel (upstream).
Scenario
Step 1: Set the following configuration in DUT0 :
set interfaces ethernet eth0 vif 100 address 10.0.0.2/24 set interfaces ethernet eth1 vif 200 address 20.0.0.2/24 set interfaces tunnel tun1 address 1.0.0.2/32 set interfaces tunnel tun1 encapsulation gre set interfaces tunnel tun1 local-address 10.0.0.2 set interfaces tunnel tun1 local-interface eth0.100 set interfaces tunnel tun1 nhrp holdtime 5 set interfaces tunnel tun1 nhrp nhs 1.0.0.1 nbma 10.0.0.1 set service dhcp-relay INS downstream-interface eth1.200 set service dhcp-relay INS server 1.0.0.1 set service dhcp-relay INS upstream-interface eth0.100 set service dhcp-relay INS upstream-interface tun1 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 2: Set the following configuration in DUT1 :
set interfaces ethernet eth0 vif 100 address 10.0.0.1/24 set interfaces tunnel tun1 address 1.0.0.1/32 set interfaces tunnel tun1 encapsulation gre set interfaces tunnel tun1 local-address 10.0.0.1 set interfaces tunnel tun1 local-interface eth0.100 set interfaces tunnel tun1 nhrp set protocols static route 0.0.0.0/0 next-hop 10.0.0.2 set protocols static route 20.0.0.0/24 next-hop 1.0.0.2 set service dhcp-server shared-network dummy subnet 1.0.0.1/32 set service dhcp-server shared-network remote subnet 20.0.0.0/24 start 20.0.0.50 stop 20.0.0.50 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 3: Set the following configuration in DUT2 :
set interfaces ethernet eth0 vif 200 address dhcp set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 4: Ping IP address 10.0.0.1 from DUT0:
admin@DUT0$ ping 10.0.0.1 count 1 size 56 timeout 1Show output
PING 10.0.0.1 (10.0.0.1) 56(84) bytes of data. 64 bytes from 10.0.0.1: icmp_seq=1 ttl=64 time=0.222 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.222/0.222/0.222/0.000 ms
Step 5: Ping IP address 1.0.0.1 from DUT0:
admin@DUT0$ ping 1.0.0.1 count 1 size 56 timeout 1Show output
PING 1.0.0.1 (1.0.0.1) 56(84) bytes of data. 64 bytes from 1.0.0.1: icmp_seq=1 ttl=64 time=0.231 ms --- 1.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.231/0.231/0.231/0.000 ms
Step 6: Run command interfaces ethernet show at DUT2 and check if output contains the following tokens:
20.0.0.50Show output
--------------------------------------------------------------------- Name IP Address Admin Oper Vrf Description --------------------------------------------------------------------- eth0 fe80::dcad:beff:feef:6c20/64 up up eth0.200 20.0.0.50/24 up up fe80::dcad:beff:feef:6c20/64 eth1 down down
Test DHCP Relay With Multiple Instances
Description
This example demonstrates how to configure multiple DHCP relay instances.
Scenario
Step 1: Set the following configuration in DUT0 :
set interfaces ethernet eth0 vif 100 address 10.0.0.2/24 set interfaces ethernet eth1 vif 200 address 20.0.0.2/24 set interfaces ethernet eth1 vif 300 address 30.0.0.2/24 set service dhcp-relay INS downstream-interface eth1.200 set service dhcp-relay INS server 10.0.0.1 set service dhcp-relay INS upstream-interface eth0.100 set service dhcp-relay INS2 downstream-interface eth1.300 set service dhcp-relay INS2 server 10.0.0.1 set service dhcp-relay INS2 upstream-interface eth0.100 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 2: Set the following configuration in DUT1 :
set interfaces ethernet eth0 vif 100 address 10.0.0.1/24 set protocols static route 0.0.0.0/0 next-hop 10.0.0.2 set service dhcp-server shared-network dummy subnet 10.0.0.1/32 set service dhcp-server shared-network remote subnet 20.0.0.0/24 start 20.0.0.50 stop 20.0.0.50 set service dhcp-server shared-network remote2 subnet 30.0.0.0/24 start 30.0.0.50 stop 30.0.0.50 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 3: Set the following configuration in DUT2 :
set interfaces ethernet eth0 vif 200 address dhcp set interfaces ethernet eth0 vif 300 address dhcp set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 4: Ping IP address 10.0.0.1 from DUT0:
admin@DUT0$ ping 10.0.0.1 count 1 size 56 timeout 1Show output
PING 10.0.0.1 (10.0.0.1) 56(84) bytes of data. 64 bytes from 10.0.0.1: icmp_seq=1 ttl=64 time=0.243 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.243/0.243/0.243/0.000 ms
Step 5: Run command interfaces ethernet show at DUT2 and check if output contains the following tokens:
20.0.0.50Show output
--------------------------------------------------------------------- Name IP Address Admin Oper Vrf Description --------------------------------------------------------------------- eth0 fe80::dcad:beff:feef:6c20/64 up up eth0.200 20.0.0.50/24 up up fe80::dcad:beff:feef:6c20/64 eth0.300 30.0.0.50/24 up up fe80::dcad:beff:feef:6c20/64 eth1 down down
Step 6: Run command interfaces ethernet show at DUT2 and check if output contains the following tokens:
30.0.0.50Show output
--------------------------------------------------------------------- Name IP Address Admin Oper Vrf Description --------------------------------------------------------------------- eth0 fe80::dcad:beff:feef:6c20/64 up up eth0.200 20.0.0.50/24 up up fe80::dcad:beff:feef:6c20/64 eth0.300 30.0.0.50/24 up up fe80::dcad:beff:feef:6c20/64 eth1 down down
Step 7: Run command system journal show | cat at DUT1 and check if output matches the following regular expressions:
DHCPACK on 20.0.0.50 to [^\)]+\) via 20.0.0.2 DHCPACK on 30.0.0.50 to [^\)]+\) via 30.0.0.2Show output
May 14 10:24:32.338374 osdx systemd-journald[1753]: Runtime Journal (/run/log/journal/899392cd00944cdaa29aa3964bffbd0e) is 1.0M, max 7.2M, 6.2M free. May 14 10:24:32.340584 osdx systemd-journald[1753]: Received client request to rotate journal, rotating. May 14 10:24:32.340650 osdx systemd-journald[1753]: Vacuuming done, freed 0B of archived journals from /run/log/journal/899392cd00944cdaa29aa3964bffbd0e. May 14 10:24:32.348691 osdx OSDxCLI[154664]: User 'admin' executed a new command: 'system journal clear'. May 14 10:24:32.809381 osdx osdx-coredump[251237]: Deleting all coredumps in /opt/vyatta/etc/config/coredump... May 14 10:24:32.818918 osdx OSDxCLI[154664]: User 'admin' executed a new command: 'system coredump delete all'. May 14 10:24:34.456950 osdx OSDxCLI[154664]: User 'admin' entered the configuration menu. May 14 10:24:34.536171 osdx OSDxCLI[154664]: User 'admin' added a new cfg line: 'set interfaces eth0.100 address 10.0.0.1/24'. May 14 10:24:34.625889 osdx OSDxCLI[154664]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network dummy subnet 10.0.0.1/32'. May 14 10:24:34.695007 osdx OSDxCLI[154664]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network remote subnet 20.0.0.0/24 start 20.0.0.50 stop 20.0.0.50'. May 14 10:24:34.808621 osdx OSDxCLI[154664]: User 'admin' added a new cfg line: 'set protocols static route 0.0.0.0/0 next-hop 10.0.0.2'. May 14 10:24:34.891717 osdx OSDxCLI[154664]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network remote2 subnet 30.0.0.0/24 start 30.0.0.50 stop 30.0.0.50'. May 14 10:24:35.035145 osdx OSDxCLI[154664]: User 'admin' added a new cfg line: 'show working'. May 14 10:24:35.146501 osdx ubnt-cfgd[251258]: inactive May 14 10:24:35.177553 osdx INFO[251270]: FRR daemons did not change May 14 10:24:35.200611 osdx kernel: 8021q: adding VLAN 0 to HW filter on device eth0 May 14 10:24:35.231463 osdx (udev-worker)[251322]: Network interface NamePolicy= disabled on kernel command line. May 14 10:24:35.389095 osdx systemd[1]: Started dhcpd@main.service - "DHCP Server Service instance main". May 14 10:24:35.392545 osdx cfgd[1455]: [154664]Completed change to active configuration May 14 10:24:35.393175 osdx dhcpd[251387]: Wrote 0 leases to leases file. May 14 10:24:35.405056 osdx OSDxCLI[154664]: User 'admin' committed the configuration. May 14 10:24:35.425830 osdx dhcpd[251387]: May 14 10:24:35.425835 osdx dhcpd[251387]: No subnet declaration for eth0 (no IPv4 addresses). May 14 10:24:35.425838 osdx dhcpd[251387]: ** Ignoring requests on eth0. If this is not what May 14 10:24:35.425840 osdx dhcpd[251387]: you want, please write a subnet declaration May 14 10:24:35.425843 osdx dhcpd[251387]: in your dhcpd.conf file for the network segment May 14 10:24:35.425845 osdx dhcpd[251387]: to which interface eth0 is attached. ** May 14 10:24:35.425847 osdx dhcpd[251387]: May 14 10:24:35.428416 osdx OSDxCLI[154664]: User 'admin' left the configuration menu. May 14 10:24:35.432736 osdx dhcpd[251387]: Server starting service. May 14 10:24:36.192433 osdx dhcpd[251387]: DHCPDISCOVER from de:ad:be:ef:6c:20 via 20.0.0.2 May 14 10:24:36.356184 osdx dhcpd[251387]: DHCPDISCOVER from de:ad:be:ef:6c:20 via 30.0.0.2 May 14 10:24:37.193021 osdx dhcpd[251387]: DHCPOFFER on 20.0.0.50 to de:ad:be:ef:6c:20 (osdx) via 20.0.0.2 May 14 10:24:37.193641 osdx dhcpd[251387]: DHCPREQUEST for 20.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:20 (osdx) via 20.0.0.2 May 14 10:24:37.453895 osdx dhcpd[251387]: DHCPACK on 20.0.0.50 to de:ad:be:ef:6c:20 (osdx) via 20.0.0.2 May 14 10:24:37.453955 osdx dhcpd[251387]: DHCPOFFER on 30.0.0.50 to de:ad:be:ef:6c:20 (osdx) via 30.0.0.2 May 14 10:24:37.454529 osdx dhcpd[251387]: DHCPREQUEST for 30.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:20 (osdx) via 30.0.0.2 May 14 10:24:37.511172 osdx dhcpd[251387]: DHCPACK on 30.0.0.50 to de:ad:be:ef:6c:20 (osdx) via 30.0.0.2