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 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 local-address 1.1.1.1 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 interfaces ethernet eth0 vif 100 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 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=0.353 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.353/0.353/0.353/0.000 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 eth2 down down eth3 down down
Step 6: Run command system journal show | cat at DUT1 and check if output matches the following regular expressions:
SRC=1.1.1.1 DST=10.0.0.1Show output
Jun 04 16:52:24.281082 osdx systemd-journald[1992]: Runtime Journal (/run/log/journal/8ce304953175416aa09f22e2dd03a8cc) is 940.0K, max 6.4M, 5.5M free. Jun 04 16:52:24.283519 osdx systemd-journald[1992]: Received client request to rotate journal, rotating. Jun 04 16:52:24.283590 osdx systemd-journald[1992]: Vacuuming done, freed 0B of archived journals from /run/log/journal/8ce304953175416aa09f22e2dd03a8cc. Jun 04 16:52:24.291348 osdx OSDxCLI[459825]: User 'admin' executed a new command: 'system journal clear'. Jun 04 16:52:24.506081 osdx OSDxCLI[459825]: User 'admin' executed a new command: 'system coredump delete all'. Jun 04 16:52:25.973763 osdx OSDxCLI[459825]: User 'admin' entered the configuration menu. Jun 04 16:52:26.064251 osdx OSDxCLI[459825]: User 'admin' added a new cfg line: 'set interfaces eth0.100 address 10.0.0.1/24'. Jun 04 16:52:26.142065 osdx OSDxCLI[459825]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network dummy subnet 10.0.0.1/32'. Jun 04 16:52:26.198334 osdx OSDxCLI[459825]: 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 04 16:52:26.294505 osdx OSDxCLI[459825]: User 'admin' added a new cfg line: 'set protocols static route 0.0.0.0/0 next-hop 10.0.0.2'. Jun 04 16:52:26.355350 osdx OSDxCLI[459825]: User 'admin' added a new cfg line: 'set traffic policy LOGGER rule 1 log prefix DHCP_'. Jun 04 16:52:26.456840 osdx OSDxCLI[459825]: User 'admin' added a new cfg line: 'set traffic policy LOGGER rule 1 selector UDP'. Jun 04 16:52:26.518352 osdx OSDxCLI[459825]: User 'admin' added a new cfg line: 'set traffic selector UDP rule 1 protocol udp'. Jun 04 16:52:26.607069 osdx OSDxCLI[459825]: User 'admin' added a new cfg line: 'set traffic selector UDP rule 1 destination port 67'. Jun 04 16:52:26.664156 osdx OSDxCLI[459825]: User 'admin' added a new cfg line: 'set interfaces eth0.100 traffic policy in LOGGER'. Jun 04 16:52:26.774587 osdx OSDxCLI[459825]: User 'admin' added a new cfg line: 'show working'. Jun 04 16:52:26.836403 osdx ubnt-cfgd[563314]: inactive Jun 04 16:52:26.900506 osdx INFO[563343]: FRR daemons did not change Jun 04 16:52:26.935535 osdx kernel: 8021q: adding VLAN 0 to HW filter on device eth0 Jun 04 16:52:26.951571 osdx WARNING[563383]: No supported link modes on interface eth0 Jun 04 16:52:26.953260 osdx modulelauncher[563383]: osdx.utils.xos cmd error: /sbin/ethtool -A eth0 autoneg on Jun 04 16:52:26.953281 osdx modulelauncher[563383]: Command '/sbin/ethtool -A eth0 autoneg on' returned non-zero exit status 76. Jun 04 16:52:26.954632 osdx modulelauncher[563383]: osdx.utils.xos cmd error: /sbin/ethtool -s eth0 autoneg on advertise Pause off Asym_Pause off -- Jun 04 16:52:26.954645 osdx modulelauncher[563383]: Command '/sbin/ethtool -s eth0 autoneg on advertise Pause off Asym_Pause off --' returned non-zero exit status 75. Jun 04 16:52:26.968427 osdx (udev-worker)[563402]: Network interface NamePolicy= disabled on kernel command line. Jun 04 16:52:27.250954 osdx dhcpd[563507]: Wrote 0 static lease entries. Jun 04 16:52:27.248036 osdx systemd[1]: Started dhcpd@main.service - "DHCP Server Service instance main". Jun 04 16:52:27.250959 osdx dhcpd[563507]: Wrote 0 leases to leases file. Jun 04 16:52:27.253707 osdx cfgd[1711]: [459825]Completed change to active configuration Jun 04 16:52:27.260279 osdx dhcpd[563507]: Jun 04 16:52:27.260458 osdx dhcpd[563507]: No subnet declaration for eth0 (no IPv4 addresses). Jun 04 16:52:27.260490 osdx dhcpd[563507]: ** Ignoring requests on eth0. If this is not what Jun 04 16:52:27.260493 osdx dhcpd[563507]: you want, please write a subnet declaration Jun 04 16:52:27.260495 osdx dhcpd[563507]: in your dhcpd.conf file for the network segment Jun 04 16:52:27.260498 osdx dhcpd[563507]: to which interface eth0 is attached. ** Jun 04 16:52:27.260501 osdx dhcpd[563507]: Jun 04 16:52:27.268001 osdx OSDxCLI[459825]: User 'admin' committed the configuration. Jun 04 16:52:27.275668 osdx dhcpd[563507]: Server starting service. Jun 04 16:52:27.284017 osdx OSDxCLI[459825]: User 'admin' left the configuration menu. Jun 04 16:52:27.957553 osdx kernel: [DHCP_-1] ACCEPT IN=eth0.100 OUT= MAC=de:ad:be:ef:6c:10:de:ad:be:ef:6c:00:08:00:45:00:01:48 SRC=1.1.1.1 DST=10.0.0.1 LEN=328 TOS=0x00 PREC=0x00 TTL=64 ID=9424 DF PROTO=UDP SPT=67 DPT=67 LEN=308 Jun 04 16:52:27.957502 osdx dhcpd[563507]: DHCPDISCOVER from de:ad:be:ef:6c:20 via 20.0.0.2 Jun 04 16:52:28.958120 osdx dhcpd[563507]: DHCPOFFER on 20.0.0.50 to de:ad:be:ef:6c:20 (osdx) via 20.0.0.2 Jun 04 16:52:28.958794 osdx dhcpd[563507]: DHCPREQUEST for 20.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:20 (osdx) via 20.0.0.2 Jun 04 16:52:28.959495 osdx kernel: [DHCP_-1] ACCEPT IN=eth0.100 OUT= MAC=de:ad:be:ef:6c:10:de:ad:be:ef:6c:00:08:00:45:00:01:48 SRC=1.1.1.1 DST=10.0.0.1 LEN=328 TOS=0x00 PREC=0x00 TTL=64 ID=9653 DF PROTO=UDP SPT=67 DPT=67 LEN=308 Jun 04 16:52:28.975308 osdx dhcpd[563507]: DHCPACK on 20.0.0.50 to de:ad:be:ef:6c:20 (osdx) via 20.0.0.2