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=0.334 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.334/0.334/0.334/0.000 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=0.436 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.436/0.436/0.436/0.000 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 09 10:10:59.349773 osdx systemd-journald[1556]: Runtime Journal (/run/log/journal/74236e08c7024a4484070d6014d45b65) is 2.4M, max 9.7M, 7.3M free. Oct 09 10:10:59.352964 osdx systemd-journald[1556]: Received client request to rotate journal, rotating. Oct 09 10:10:59.353044 osdx systemd-journald[1556]: Vacuuming done, freed 0B of archived journals from /run/log/journal/74236e08c7024a4484070d6014d45b65. Oct 09 10:10:59.365675 osdx OSDxCLI[9385]: User 'admin' executed a new command: 'system journal clear'. Oct 09 10:10:59.975847 osdx osdx-coredump[154164]: Deleting all coredumps in /opt/vyatta/etc/config/coredump... Oct 09 10:10:59.986082 osdx OSDxCLI[9385]: User 'admin' executed a new command: 'system coredump delete all'. Oct 09 10:11:02.013906 osdx OSDxCLI[9385]: User 'admin' entered the configuration menu. Oct 09 10:11:02.151218 osdx OSDxCLI[9385]: User 'admin' added a new cfg line: 'set interfaces eth0.100 address 10.0.0.1/24'. Oct 09 10:11:02.244145 osdx OSDxCLI[9385]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network dummy subnet 10.0.0.1/32'. Oct 09 10:11:02.383747 osdx OSDxCLI[9385]: 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 09 10:11:02.484354 osdx OSDxCLI[9385]: User 'admin' added a new cfg line: 'set protocols static route 0.0.0.0/0 next-hop 10.0.0.2'. Oct 09 10:11:02.614561 osdx OSDxCLI[9385]: User 'admin' added a new cfg line: 'show working'. Oct 09 10:11:02.780966 osdx kernel: 8021q: adding VLAN 0 to HW filter on device eth0 Oct 09 10:11:02.825814 osdx (udev-worker)[154236]: Network interface NamePolicy= disabled on kernel command line. Oct 09 10:11:03.049279 osdx systemd[1]: Started dhcpd@main.service - "DHCP Server Service instance main". Oct 09 10:11:03.052297 osdx cfgd[1223]: [9385]Completed change to active configuration Oct 09 10:11:03.057457 osdx dhcpd[154261]: Wrote 0 leases to leases file. Oct 09 10:11:03.103582 osdx dhcpd[154261]: Oct 09 10:11:03.103588 osdx dhcpd[154261]: No subnet declaration for eth0 (no IPv4 addresses). Oct 09 10:11:03.103591 osdx dhcpd[154261]: ** Ignoring requests on eth0. If this is not what Oct 09 10:11:03.103594 osdx dhcpd[154261]: you want, please write a subnet declaration Oct 09 10:11:03.103597 osdx dhcpd[154261]: in your dhcpd.conf file for the network segment Oct 09 10:11:03.103600 osdx dhcpd[154261]: to which interface eth0 is attached. ** Oct 09 10:11:03.103602 osdx dhcpd[154261]: Oct 09 10:11:03.104809 osdx OSDxCLI[9385]: User 'admin' committed the configuration. Oct 09 10:11:03.109096 osdx dhcpd[154261]: Server starting service. Oct 09 10:11:03.132553 osdx OSDxCLI[9385]: User 'admin' left the configuration menu. Oct 09 10:11:03.948032 osdx dhcpd[154261]: DHCPDISCOVER from de:ad:be:ef:6c:30 via 20.0.0.3 Oct 09 10:11:04.948894 osdx dhcpd[154261]: DHCPOFFER on 20.0.0.50 to de:ad:be:ef:6c:30 (osdx) via 20.0.0.3 Oct 09 10:11:04.949740 osdx dhcpd[154261]: DHCPREQUEST for 20.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:30 (osdx) via 20.0.0.3 Oct 09 10:11:04.968695 osdx dhcpd[154261]: 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=0.271 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.271/0.271/0.271/0.000 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=0.424 ms --- 1.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.424/0.424/0.424/0.000 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=0.300 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.300/0.300/0.300/0.000 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 09 10:11:30.404494 osdx systemd-journald[1556]: Runtime Journal (/run/log/journal/74236e08c7024a4484070d6014d45b65) is 2.4M, max 9.7M, 7.3M free. Oct 09 10:11:30.407133 osdx systemd-journald[1556]: Received client request to rotate journal, rotating. Oct 09 10:11:30.407239 osdx systemd-journald[1556]: Vacuuming done, freed 0B of archived journals from /run/log/journal/74236e08c7024a4484070d6014d45b65. Oct 09 10:11:30.426349 osdx OSDxCLI[9385]: User 'admin' executed a new command: 'system journal clear'. Oct 09 10:11:31.094895 osdx osdx-coredump[154830]: Deleting all coredumps in /opt/vyatta/etc/config/coredump... Oct 09 10:11:31.106060 osdx OSDxCLI[9385]: User 'admin' executed a new command: 'system coredump delete all'. Oct 09 10:11:33.552218 osdx OSDxCLI[9385]: User 'admin' entered the configuration menu. Oct 09 10:11:33.660156 osdx OSDxCLI[9385]: User 'admin' added a new cfg line: 'set interfaces eth0.100 address 10.0.0.1/24'. Oct 09 10:11:33.767197 osdx OSDxCLI[9385]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network dummy subnet 10.0.0.1/32'. Oct 09 10:11:33.897188 osdx OSDxCLI[9385]: 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 09 10:11:33.982504 osdx OSDxCLI[9385]: User 'admin' added a new cfg line: 'set protocols static route 0.0.0.0/0 next-hop 10.0.0.2'. Oct 09 10:11:34.088054 osdx OSDxCLI[9385]: 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 09 10:11:34.216535 osdx OSDxCLI[9385]: User 'admin' added a new cfg line: 'show working'. Oct 09 10:11:34.350869 osdx kernel: 8021q: adding VLAN 0 to HW filter on device eth0 Oct 09 10:11:34.390488 osdx (udev-worker)[154900]: Network interface NamePolicy= disabled on kernel command line. Oct 09 10:11:34.687372 osdx systemd[1]: Started dhcpd@main.service - "DHCP Server Service instance main". Oct 09 10:11:34.690487 osdx cfgd[1223]: [9385]Completed change to active configuration Oct 09 10:11:34.695983 osdx dhcpd[154925]: Wrote 0 leases to leases file. Oct 09 10:11:34.732263 osdx OSDxCLI[9385]: User 'admin' committed the configuration. Oct 09 10:11:34.757669 osdx OSDxCLI[9385]: User 'admin' left the configuration menu. Oct 09 10:11:35.366477 osdx dhcpd[154925]: Oct 09 10:11:35.366484 osdx dhcpd[154925]: No subnet declaration for eth0 (no IPv4 addresses). Oct 09 10:11:35.366488 osdx dhcpd[154925]: ** Ignoring requests on eth0. If this is not what Oct 09 10:11:35.366491 osdx dhcpd[154925]: you want, please write a subnet declaration Oct 09 10:11:35.366494 osdx dhcpd[154925]: in your dhcpd.conf file for the network segment Oct 09 10:11:35.366497 osdx dhcpd[154925]: to which interface eth0 is attached. ** Oct 09 10:11:35.366499 osdx dhcpd[154925]: Oct 09 10:11:35.374974 osdx dhcpd[154925]: Server starting service. Oct 09 10:11:35.809817 osdx dhcpd[154925]: DHCPDISCOVER from de:ad:be:ef:6c:30 via 20.0.0.2 Oct 09 10:11:36.001646 osdx dhcpd[154925]: DHCPDISCOVER from de:ad:be:ef:6c:30 via 30.0.0.2 Oct 09 10:11:36.810456 osdx dhcpd[154925]: DHCPOFFER on 20.0.0.50 to de:ad:be:ef:6c:30 (osdx) via 20.0.0.2 Oct 09 10:11:36.811546 osdx dhcpd[154925]: DHCPREQUEST for 20.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:30 (osdx) via 20.0.0.2 Oct 09 10:11:36.839835 osdx dhcpd[154925]: DHCPACK on 20.0.0.50 to de:ad:be:ef:6c:30 (osdx) via 20.0.0.2 Oct 09 10:11:37.001939 osdx dhcpd[154925]: DHCPOFFER on 30.0.0.50 to de:ad:be:ef:6c:30 (osdx) via 30.0.0.2 Oct 09 10:11:37.002915 osdx dhcpd[154925]: DHCPREQUEST for 30.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:30 (osdx) via 30.0.0.2 Oct 09 10:11:37.031484 osdx dhcpd[154925]: DHCPACK on 30.0.0.50 to de:ad:be:ef:6c:30 (osdx) via 30.0.0.2