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=1.75 ms --- 10.0.0.1 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 1.750/1.750/1.750/0.000 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
Jul 24 11:43:33.310562 osdx systemd-journald[2060]: Runtime Journal (/run/log/journal/81882c36df9d4e5d8ea319c786369faf) is 1.6M, max 6.4M, 4.8M free. Jul 24 11:43:33.315585 osdx systemd-journald[2060]: Received client request to rotate journal, rotating. Jul 24 11:43:33.315658 osdx systemd-journald[2060]: Vacuuming done, freed 0B of archived journals from /run/log/journal/81882c36df9d4e5d8ea319c786369faf. Jul 24 11:43:33.324240 osdx OSDxCLI[2419]: User 'admin' executed a new command: 'system journal clear'. Jul 24 11:43:33.555482 osdx OSDxCLI[2419]: User 'admin' executed a new command: 'system coredump delete all'. Jul 24 11:43:35.459411 osdx OSDxCLI[2419]: User 'admin' entered the configuration menu. Jul 24 11:43:35.570417 osdx OSDxCLI[2419]: User 'admin' added a new cfg line: 'set interfaces eth0 address 10.0.0.1/24'. Jul 24 11:43:35.653348 osdx OSDxCLI[2419]: User 'admin' added a new cfg line: 'set service dhcp-server shared-network dummy subnet 10.0.0.1/32'. Jul 24 11:43:35.744824 osdx OSDxCLI[2419]: 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'. Jul 24 11:43:35.802334 osdx OSDxCLI[2419]: User 'admin' added a new cfg line: 'set protocols static route 0.0.0.0/0 next-hop 10.0.0.2'. Jul 24 11:43:35.901948 osdx OSDxCLI[2419]: User 'admin' added a new cfg line: 'set traffic policy LOGGER rule 1 log prefix DHCP_'. Jul 24 11:43:35.959300 osdx OSDxCLI[2419]: User 'admin' added a new cfg line: 'set traffic policy LOGGER rule 1 selector UDP'. Jul 24 11:43:36.087348 osdx OSDxCLI[2419]: User 'admin' added a new cfg line: 'set traffic selector UDP rule 1 protocol udp'. Jul 24 11:43:36.391081 osdx OSDxCLI[2419]: User 'admin' added a new cfg line: 'set traffic selector UDP rule 1 destination port 67'. Jul 24 11:43:36.523644 osdx OSDxCLI[2419]: User 'admin' added a new cfg line: 'set interfaces eth0 traffic policy in LOGGER'. Jul 24 11:43:36.629684 osdx OSDxCLI[2419]: User 'admin' added a new cfg line: 'show working'. Jul 24 11:43:36.707677 osdx ubnt-cfgd[489513]: inactive Jul 24 11:43:36.808553 osdx INFO[489547]: FRR daemons did not change Jul 24 11:43:36.844589 osdx kernel: 8021q: adding VLAN 0 to HW filter on device eth0 Jul 24 11:43:36.917776 osdx WARNING[489620]: No supported link modes on interface eth0 Jul 24 11:43:36.919483 osdx modulelauncher[489620]: osdx.utils.xos cmd error: /sbin/ethtool -A eth0 autoneg on Jul 24 11:43:36.919513 osdx modulelauncher[489620]: Command '/sbin/ethtool -A eth0 autoneg on' returned non-zero exit status 76. Jul 24 11:43:36.921317 osdx modulelauncher[489620]: osdx.utils.xos cmd error: /sbin/ethtool -s eth0 autoneg on advertise Asym_Pause off Pause off -- Jul 24 11:43:36.921330 osdx modulelauncher[489620]: Command '/sbin/ethtool -s eth0 autoneg on advertise Asym_Pause off Pause off --' returned non-zero exit status 75. Jul 24 11:43:37.301361 osdx systemd[1]: Started dhcpd@main.service - "DHCP Server Service instance main". Jul 24 11:43:37.354721 osdx dhcpd[489696]: Wrote 0 static lease entries. Jul 24 11:43:37.355003 osdx dhcpd[489696]: Wrote 0 leases to leases file. Jul 24 11:43:37.404818 osdx dhcpd[489696]: Server starting service. Jul 24 11:43:37.515940 osdx cfgd[1777]: [2419]Completed change to active configuration Jul 24 11:43:37.516734 osdx OSDxCLI[2419]: User 'admin' committed the configuration. Jul 24 11:43:37.545013 osdx OSDxCLI[2419]: User 'admin' left the configuration menu. Jul 24 11:43:38.245584 osdx dhcpd[489696]: DHCPDISCOVER from de:ad:be:ef:6c:21 via 20.0.0.2 Jul 24 11:43:38.248588 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=58832 DF PROTO=UDP SPT=67 DPT=67 LEN=308 Jul 24 11:43:39.246146 osdx dhcpd[489696]: DHCPOFFER on 20.0.0.50 to de:ad:be:ef:6c:21 (osdx) via 20.0.0.2 Jul 24 11:43:39.246931 osdx dhcpd[489696]: DHCPREQUEST for 20.0.0.50 (10.0.0.1) from de:ad:be:ef:6c:21 (osdx) via 20.0.0.2 Jul 24 11:43:39.248586 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=58871 DF PROTO=UDP SPT=67 DPT=67 LEN=308 Jul 24 11:43:39.273361 osdx dhcpd[489696]: DHCPACK on 20.0.0.50 to de:ad:be:ef:6c:21 (osdx) via 20.0.0.2