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=0.254 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.254/0.254/0.254/0.000 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
May 19 19:11:27.251857 osdx systemd-journald[2065]: Runtime Journal (/run/log/journal/c781b4f3f2134c23a5bd07e1836f7bfd) is 980.0K, max 6.4M, 5.5M free. May 19 19:11:27.254158 osdx systemd-journald[2065]: Received client request to rotate journal, rotating. May 19 19:11:27.254203 osdx systemd-journald[2065]: Vacuuming done, freed 0B of archived journals from /run/log/journal/c781b4f3f2134c23a5bd07e1836f7bfd. May 19 19:11:27.260632 osdx OSDxCLI[608788]: User 'admin' executed a new command: 'system journal clear'. May 19 19:11:27.444026 osdx OSDxCLI[608788]: User 'admin' executed a new command: 'system coredump delete all'. May 19 19:11:28.892410 osdx OSDxCLI[608788]: User 'admin' entered the configuration menu. May 19 19:11:28.965508 osdx OSDxCLI[608788]: User 'admin' added a new cfg line: 'set interfaces eth0 address 10.0.0.1/24'. May 19 19:11:29.037830 osdx OSDxCLI[608788]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network dummy subnet 10.0.0.1/32'. May 19 19:11:29.091794 osdx OSDxCLI[608788]: 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 19 19:11:29.176965 osdx OSDxCLI[608788]: User 'admin' added a new cfg line: 'set protocols static route 0.0.0.0/0 next-hop 10.0.0.2'. May 19 19:11:29.233598 osdx OSDxCLI[608788]: User 'admin' added a new cfg line: 'set traffic policy LOGGER rule 1 log prefix DHCP_'. May 19 19:11:29.317441 osdx OSDxCLI[608788]: User 'admin' added a new cfg line: 'set traffic policy LOGGER rule 1 selector UDP'. May 19 19:11:29.369726 osdx OSDxCLI[608788]: User 'admin' added a new cfg line: 'set traffic selector UDP rule 1 protocol udp'. May 19 19:11:29.461009 osdx OSDxCLI[608788]: User 'admin' added a new cfg line: 'set traffic selector UDP rule 1 destination port 67'. May 19 19:11:29.512606 osdx OSDxCLI[608788]: User 'admin' added a new cfg line: 'set interfaces eth0 traffic policy in LOGGER'. May 19 19:11:29.615384 osdx OSDxCLI[608788]: User 'admin' added a new cfg line: 'show working'. May 19 19:11:29.674927 osdx ubnt-cfgd[630634]: inactive May 19 19:11:29.737806 osdx INFO[630666]: FRR daemons did not change May 19 19:11:29.766154 osdx kernel: 8021q: adding VLAN 0 to HW filter on device eth0 May 19 19:11:29.809367 osdx WARNING[630739]: No supported link modes on interface eth0 May 19 19:11:29.810701 osdx modulelauncher[630739]: osdx.utils.xos cmd error: /sbin/ethtool -A eth0 autoneg on May 19 19:11:29.810753 osdx modulelauncher[630739]: Command '/sbin/ethtool -A eth0 autoneg on' returned non-zero exit status 76. May 19 19:11:29.811889 osdx modulelauncher[630739]: osdx.utils.xos cmd error: /sbin/ethtool -s eth0 autoneg on advertise Asym_Pause off Pause off -- May 19 19:11:29.811926 osdx modulelauncher[630739]: Command '/sbin/ethtool -s eth0 autoneg on advertise Asym_Pause off Pause off --' returned non-zero exit status 75. May 19 19:11:30.146794 osdx systemd[1]: Started dhcpd@main.service - "DHCP Server Service instance main". May 19 19:11:30.165196 osdx dhcpd[630815]: Wrote 0 leases to leases file. May 19 19:11:30.210258 osdx dhcpd[630815]: Server starting service. May 19 19:11:30.309063 osdx cfgd[1789]: [608788]Completed change to active configuration May 19 19:11:30.309501 osdx OSDxCLI[608788]: User 'admin' committed the configuration. May 19 19:11:30.323805 osdx OSDxCLI[608788]: User 'admin' left the configuration menu. May 19 19:11:30.889806 osdx dhcpd[630815]: DHCPDISCOVER from de:ad:be:ef:6c:21 via 20.0.0.2 May 19 19:11:30.890151 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=45291 DF PROTO=UDP SPT=67 DPT=67 LEN=308 May 19 19:11:31.889938 osdx dhcpd[630815]: DHCPOFFER on 20.0.0.50 to de:ad:be:ef:6c:21 (osdx) via 20.0.0.2 May 19 19:11:31.890652 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=45425 DF PROTO=UDP SPT=67 DPT=67 LEN=308 May 19 19:11:31.890678 osdx dhcpd[630815]: DHCPREQUEST for 20.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:21 (osdx) via 20.0.0.2 May 19 19:11:31.908981 osdx dhcpd[630815]: DHCPACK on 20.0.0.50 to de:ad:be:ef:6c:21 (osdx) via 20.0.0.2