Local-Address
This scenario shows how to configure a DHCP relay agent to
forward DHCP requests. By default, the local-address option uses
a custom local IP as source address for upstream traffic.
Test DHCP Relay With Local-Address
Description
This example shows how to configure the
local-address option. This command can be used
to set the source address for upstream traffic.
Scenario
Step 1: Set the following configuration in DUT0 :
set interfaces dummy dum0 address 1.1.1.1/32 set interfaces ethernet eth0 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 local-address 1.1.1.1 set service dhcp-relay INS server 10.0.0.1 set service dhcp-relay INS upstream-interface eth0 set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 2: Set the following configuration in DUT1 :
set interfaces ethernet eth0 address 10.0.0.1/24 set interfaces ethernet eth0 traffic policy in LOGGER 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' set traffic policy LOGGER rule 1 log prefix DHCP_ set traffic policy LOGGER rule 1 selector UDP set traffic selector UDP rule 1 destination port 67 set traffic selector UDP rule 1 protocol udp
Step 3: Set the following configuration in DUT2 :
set interfaces ethernet eth1 vif 200 address dhcp set system login user admin authentication encrypted-password '$6$GSjsCj8gHLv$/VcqU6FLi6CT2Oxn0MJQ2C2tqnRDrYKNF8HIYWJp68nvXvPdFccDsT04.WtigUONbKYrgKg8d6rEs8PjljMkH0'
Step 4: Ping the IP address 10.0.0.1 from DUT0:
admin@DUT0$ 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=0.280 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.280/0.280/0.280/0.000 ms
Step 5: Run the command interfaces ethernet show on DUT2 and check whether the output contains the following tokens:
20.0.0.50Show output
--------------------------------------------------------------------- Name IP Address Admin Oper Vrf Description --------------------------------------------------------------------- eth0 down down eth1 fe80::dcad:beff:feef:6c21/64 up up eth1.200 20.0.0.50/24 up up fe80::dcad:beff:feef:6c21/64 eth2 down down eth3 down down
Step 6: Run the command system journal show | cat on DUT1 and check whether the output matches the following regular expressions:
SRC=1.1.1.1 DST=10.0.0.1Show output
Jun 03 17:44:18.260801 osdx systemd-journald[2044]: Runtime Journal (/run/log/journal/5f949ce1ec2e4c3196487af568d04dde) is 896.0K, max 6.4M, 5.6M free. Jun 03 17:44:18.261207 osdx systemd-journald[2044]: Received client request to rotate journal, rotating. Jun 03 17:44:18.261239 osdx systemd-journald[2044]: Vacuuming done, freed 0B of archived journals from /run/log/journal/5f949ce1ec2e4c3196487af568d04dde. Jun 03 17:44:18.271011 osdx OSDxCLI[623229]: User 'admin' executed a new command: 'system journal clear'. Jun 03 17:44:18.464715 osdx OSDxCLI[623229]: User 'admin' executed a new command: 'system coredump delete all'. Jun 03 17:44:20.055018 osdx OSDxCLI[623229]: User 'admin' entered the configuration menu. Jun 03 17:44:20.149983 osdx OSDxCLI[623229]: User 'admin' added a new cfg line: 'set interfaces eth0 address 10.0.0.1/24'. Jun 03 17:44:20.210986 osdx OSDxCLI[623229]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network dummy subnet 10.0.0.1/32'. Jun 03 17:44:20.309741 osdx OSDxCLI[623229]: 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'. Jun 03 17:44:20.362980 osdx OSDxCLI[623229]: User 'admin' added a new cfg line: 'set protocols static route 0.0.0.0/0 next-hop 10.0.0.2'. Jun 03 17:44:20.466376 osdx OSDxCLI[623229]: User 'admin' added a new cfg line: 'set traffic policy LOGGER rule 1 log prefix DHCP_'. Jun 03 17:44:20.518739 osdx OSDxCLI[623229]: User 'admin' added a new cfg line: 'set traffic policy LOGGER rule 1 selector UDP'. Jun 03 17:44:20.624239 osdx OSDxCLI[623229]: User 'admin' added a new cfg line: 'set traffic selector UDP rule 1 protocol udp'. Jun 03 17:44:20.684312 osdx OSDxCLI[623229]: User 'admin' added a new cfg line: 'set traffic selector UDP rule 1 destination port 67'. Jun 03 17:44:20.801512 osdx OSDxCLI[623229]: User 'admin' added a new cfg line: 'set interfaces eth0 traffic policy in LOGGER'. Jun 03 17:44:20.886056 osdx OSDxCLI[623229]: User 'admin' added a new cfg line: 'show working'. Jun 03 17:44:20.978193 osdx ubnt-cfgd[711590]: inactive Jun 03 17:44:21.083655 osdx INFO[711622]: FRR daemons did not change Jun 03 17:44:21.113043 osdx kernel: 8021q: adding VLAN 0 to HW filter on device eth0 Jun 03 17:44:21.165033 osdx WARNING[711695]: No supported link modes on interface eth0 Jun 03 17:44:21.166611 osdx modulelauncher[711695]: osdx.utils.xos cmd error: /sbin/ethtool -A eth0 autoneg on Jun 03 17:44:21.166725 osdx modulelauncher[711695]: Command '/sbin/ethtool -A eth0 autoneg on' returned non-zero exit status 76. Jun 03 17:44:21.167866 osdx modulelauncher[711695]: osdx.utils.xos cmd error: /sbin/ethtool -s eth0 autoneg on advertise Asym_Pause off Pause off -- Jun 03 17:44:21.167925 osdx modulelauncher[711695]: Command '/sbin/ethtool -s eth0 autoneg on advertise Asym_Pause off Pause off --' returned non-zero exit status 75. Jun 03 17:44:21.429493 osdx systemd[1]: Started dhcpd@main.service - "DHCP Server Service instance main". Jun 03 17:44:21.431619 osdx dhcpd[711764]: Wrote 0 leases to leases file. Jun 03 17:44:21.453259 osdx dhcpd[711764]: Server starting service. Jun 03 17:44:21.604753 osdx cfgd[1768]: [623229]Completed change to active configuration Jun 03 17:44:21.605329 osdx OSDxCLI[623229]: User 'admin' committed the configuration. Jun 03 17:44:21.627622 osdx OSDxCLI[623229]: User 'admin' left the configuration menu. Jun 03 17:44:22.351941 osdx dhcpd[711764]: DHCPDISCOVER from de:ad:be:ef:6c:21 via 20.0.0.2 Jun 03 17:44:22.353020 osdx kernel: [DHCP_-1] ACCEPT IN=eth0 OUT= MAC=de:ad:be:ef:6c:10:de:ad:be:ef:6c:00:08:00 SRC=1.1.1.1 DST=10.0.0.1 LEN=328 TOS=0x00 PREC=0x00 TTL=64 ID=57143 DF PROTO=UDP SPT=67 DPT=67 LEN=308 Jun 03 17:44:23.352154 osdx dhcpd[711764]: DHCPOFFER on 20.0.0.50 to de:ad:be:ef:6c:21 (osdx) via 20.0.0.2 Jun 03 17:44:23.352932 osdx dhcpd[711764]: DHCPREQUEST for 20.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:21 (osdx) via 20.0.0.2 Jun 03 17:44:23.353030 osdx kernel: [DHCP_-1] ACCEPT IN=eth0 OUT= MAC=de:ad:be:ef:6c:10:de:ad:be:ef:6c:00:08:00 SRC=1.1.1.1 DST=10.0.0.1 LEN=328 TOS=0x00 PREC=0x00 TTL=64 ID=57310 DF PROTO=UDP SPT=67 DPT=67 LEN=308 Jun 03 17:44:23.371988 osdx dhcpd[711764]: DHCPACK on 20.0.0.50 to de:ad:be:ef:6c:21 (osdx) via 20.0.0.2