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=0.263 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.263/0.263/0.263/0.000 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:6c30/64 up up eth0.200 20.0.0.50/24 up up fe80::dcad:beff:feef:6c30/64 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=0.245 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.245/0.245/0.245/0.000 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:6c30/64 up up eth0.200 20.0.0.50/24 up up fe80::dcad:beff:feef:6c30/64 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
Oct 07 12:57:03.264774 osdx systemd-journald[1498]: Runtime Journal (/run/log/journal/ea535239cdf24d6195135cccfda89139) is 1.3M, max 9.7M, 8.4M free. Oct 07 12:57:03.268237 osdx systemd-journald[1498]: Received client request to rotate journal, rotating. Oct 07 12:57:03.268290 osdx systemd-journald[1498]: Vacuuming done, freed 0B of archived journals from /run/log/journal/ea535239cdf24d6195135cccfda89139. Oct 07 12:57:03.274603 osdx OSDxCLI[117440]: User 'admin' executed a new command: 'system journal clear'. Oct 07 12:57:03.694629 osdx osdx-coredump[214241]: Deleting all coredumps in /opt/vyatta/etc/config/coredump... Oct 07 12:57:03.702303 osdx OSDxCLI[117440]: User 'admin' executed a new command: 'system coredump delete all'. Oct 07 12:57:05.157379 osdx OSDxCLI[117440]: User 'admin' entered the configuration menu. Oct 07 12:57:05.231990 osdx OSDxCLI[117440]: User 'admin' added a new cfg line: 'set interfaces eth0.100 address 10.0.0.1/24'. Oct 07 12:57:05.349731 osdx OSDxCLI[117440]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network dummy subnet 10.0.0.1/32'. Oct 07 12:57:05.472782 osdx OSDxCLI[117440]: 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'. Oct 07 12:57:05.544822 osdx OSDxCLI[117440]: User 'admin' added a new cfg line: 'set protocols static route 0.0.0.0/0 next-hop 10.0.0.2'. Oct 07 12:57:05.694983 osdx OSDxCLI[117440]: User 'admin' added a new cfg line: 'show working'. Oct 07 12:57:05.824361 osdx kernel: 8021q: adding VLAN 0 to HW filter on device eth0 Oct 07 12:57:05.852027 osdx (udev-worker)[214307]: Network interface NamePolicy= disabled on kernel command line. Oct 07 12:57:05.932457 osdx systemd[1]: Started dhcpd@main.service - "DHCP Server Service instance main". Oct 07 12:57:05.935233 osdx cfgd[1206]: [117440]Completed change to active configuration Oct 07 12:57:05.937777 osdx dhcpd[214329]: Wrote 0 leases to leases file. Oct 07 12:57:05.963368 osdx dhcpd[214329]: Oct 07 12:57:05.963372 osdx dhcpd[214329]: No subnet declaration for eth0 (no IPv4 addresses). Oct 07 12:57:05.963375 osdx dhcpd[214329]: ** Ignoring requests on eth0. If this is not what Oct 07 12:57:05.963377 osdx dhcpd[214329]: you want, please write a subnet declaration Oct 07 12:57:05.963379 osdx dhcpd[214329]: in your dhcpd.conf file for the network segment Oct 07 12:57:05.963381 osdx dhcpd[214329]: to which interface eth0 is attached. ** Oct 07 12:57:05.963383 osdx dhcpd[214329]: Oct 07 12:57:05.964874 osdx OSDxCLI[117440]: User 'admin' committed the configuration. Oct 07 12:57:05.968379 osdx dhcpd[214329]: Server starting service. Oct 07 12:57:05.997091 osdx OSDxCLI[117440]: User 'admin' left the configuration menu. Oct 07 12:57:06.557295 osdx dhcpd[214329]: DHCPDISCOVER from de:ad:be:ef:6c:30 via 20.0.0.3 Oct 07 12:57:07.557640 osdx dhcpd[214329]: DHCPOFFER on 20.0.0.50 to de:ad:be:ef:6c:30 (osdx) via 20.0.0.3 Oct 07 12:57:07.558208 osdx dhcpd[214329]: DHCPREQUEST for 20.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:30 (osdx) via 20.0.0.3 Oct 07 12:57:07.660339 osdx dhcpd[214329]: DHCPACK on 20.0.0.50 to de:ad:be:ef:6c:30 (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=0.245 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.245/0.245/0.245/0.000 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:6c30/64 up up eth0.200 20.0.0.50/24 up up fe80::dcad:beff:feef:6c30/64 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=0.277 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.277/0.277/0.277/0.000 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:6c30/64 up up eth0.200 20.0.0.50/24 up up fe80::dcad:beff:feef:6c30/64 eth0.300 30.0.0.50/24 up up fe80::dcad:beff:feef:6c30/64 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:6c30/64 up up eth0.200 20.0.0.50/24 up up fe80::dcad:beff:feef:6c30/64 eth0.300 30.0.0.50/24 up up fe80::dcad:beff:feef:6c30/64 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
Oct 07 12:57:33.265758 osdx systemd-journald[1498]: Runtime Journal (/run/log/journal/ea535239cdf24d6195135cccfda89139) is 1.3M, max 9.7M, 8.4M free. Oct 07 12:57:33.269139 osdx systemd-journald[1498]: Received client request to rotate journal, rotating. Oct 07 12:57:33.269202 osdx systemd-journald[1498]: Vacuuming done, freed 0B of archived journals from /run/log/journal/ea535239cdf24d6195135cccfda89139. Oct 07 12:57:33.279990 osdx OSDxCLI[117440]: User 'admin' executed a new command: 'system journal clear'. Oct 07 12:57:33.695083 osdx osdx-coredump[214886]: Deleting all coredumps in /opt/vyatta/etc/config/coredump... Oct 07 12:57:33.702772 osdx OSDxCLI[117440]: User 'admin' executed a new command: 'system coredump delete all'. Oct 07 12:57:35.331573 osdx OSDxCLI[117440]: User 'admin' entered the configuration menu. Oct 07 12:57:35.402056 osdx OSDxCLI[117440]: User 'admin' added a new cfg line: 'set interfaces eth0.100 address 10.0.0.1/24'. Oct 07 12:57:35.483376 osdx OSDxCLI[117440]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network dummy subnet 10.0.0.1/32'. Oct 07 12:57:35.543614 osdx OSDxCLI[117440]: 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'. Oct 07 12:57:35.637262 osdx OSDxCLI[117440]: User 'admin' added a new cfg line: 'set protocols static route 0.0.0.0/0 next-hop 10.0.0.2'. Oct 07 12:57:35.693722 osdx OSDxCLI[117440]: 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'. Oct 07 12:57:35.827321 osdx OSDxCLI[117440]: User 'admin' added a new cfg line: 'show working'. Oct 07 12:57:35.921189 osdx kernel: 8021q: adding VLAN 0 to HW filter on device eth0 Oct 07 12:57:35.950473 osdx (udev-worker)[214956]: Network interface NamePolicy= disabled on kernel command line. Oct 07 12:57:36.041399 osdx systemd[1]: Started dhcpd@main.service - "DHCP Server Service instance main". Oct 07 12:57:36.044337 osdx cfgd[1206]: [117440]Completed change to active configuration Oct 07 12:57:36.046893 osdx dhcpd[214977]: Wrote 0 leases to leases file. Oct 07 12:57:36.087410 osdx OSDxCLI[117440]: User 'admin' committed the configuration. Oct 07 12:57:36.088299 osdx dhcpd[214977]: Oct 07 12:57:36.088303 osdx dhcpd[214977]: No subnet declaration for eth0 (no IPv4 addresses). Oct 07 12:57:36.088306 osdx dhcpd[214977]: ** Ignoring requests on eth0. If this is not what Oct 07 12:57:36.088308 osdx dhcpd[214977]: you want, please write a subnet declaration Oct 07 12:57:36.088310 osdx dhcpd[214977]: in your dhcpd.conf file for the network segment Oct 07 12:57:36.088312 osdx dhcpd[214977]: to which interface eth0 is attached. ** Oct 07 12:57:36.088315 osdx dhcpd[214977]: Oct 07 12:57:36.097304 osdx dhcpd[214977]: Server starting service. Oct 07 12:57:36.126670 osdx OSDxCLI[117440]: User 'admin' left the configuration menu. Oct 07 12:57:36.830217 osdx dhcpd[214977]: DHCPDISCOVER from de:ad:be:ef:6c:30 via 20.0.0.2 Oct 07 12:57:36.922010 osdx dhcpd[214977]: DHCPDISCOVER from de:ad:be:ef:6c:30 via 30.0.0.2 Oct 07 12:57:37.830516 osdx dhcpd[214977]: DHCPOFFER on 20.0.0.50 to de:ad:be:ef:6c:30 (osdx) via 20.0.0.2 Oct 07 12:57:37.831223 osdx dhcpd[214977]: DHCPREQUEST for 20.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:30 (osdx) via 20.0.0.2 Oct 07 12:57:37.836071 osdx dhcpd[214977]: DHCPACK on 20.0.0.50 to de:ad:be:ef:6c:30 (osdx) via 20.0.0.2 Oct 07 12:57:37.922239 osdx dhcpd[214977]: DHCPOFFER on 30.0.0.50 to de:ad:be:ef:6c:30 (osdx) via 30.0.0.2 Oct 07 12:57:37.922808 osdx dhcpd[214977]: DHCPREQUEST for 30.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:30 (osdx) via 30.0.0.2 Oct 07 12:57:37.933759 osdx dhcpd[214977]: DHCPACK on 30.0.0.50 to de:ad:be:ef:6c:30 (osdx) via 30.0.0.2