Whenever my client issues a DHCP request, the MT log says:
received discover from (MAC) with unknown giaddr 0.0.0.0
All my searching leads to some sort of DHCP relay, but the NIC is plugged directly into the router.
Can other clients receive DHCP from the server? Is it possible you turned on DHCP relay on the RouterOS device and ghat it is expecting to receive packets with GIADDR rewritten by a relay that doesn’t exist?
Another client could not pull an IP. It was a different brand of NIC.
There’s nothing in the DHCP Relay section. I reset the config before I set this up.
[admin@MikroTik] > /ip export
jan/02/1970 00:50:44 by RouterOS 4.10
software id = 1HTW-GZNC
/ip ipsec proposal
set default auth-algorithms=sha1 comment=“” disabled=no enc-algorithms=3des lifetime=30m name=default pfs-group=modp1024
/ip pool
add name=dhcp_pool1 ranges=172.16.99.2-172.16.99.254
/ip dhcp-server
add address-pool=dhcp_pool1 authoritative=after-2sec-delay bootp-support=static disabled=no interface=ether5 lease-time=3d name=dhcp1 relay=172.16.99.1
/ip accounting
set account-local-traffic=no enabled=no threshold=256
/ip accounting web-access
set accessible-via-web=no address=0.0.0.0/0
/ip address
add address=172.16.99.1/24 broadcast=172.16.99.255 comment=“” disabled=no interface=ether5 network=172.16.99.0
/ip dhcp-server config
set store-leases-disk=5m
/ip dhcp-server network
add address=172.16.99.0/24 comment=“” dns-server=10.1.5.103 gateway=172.16.99.1
/ip dns
set allow-remote-requests=no cache-max-ttl=1w cache-size=2048KiB max-udp-packet-size=512
/ip firewall connection tracking
set enabled=yes generic-timeout=10m icmp-timeout=10s tcp-close-timeout=10s tcp-close-wait-timeout=10s tcp-established-timeout=1d tcp-fin-wait-timeout=10s tcp-last-ack-timeout=10s tcp-syn-received-timeout=5s
tcp-syn-sent-timeout=5s tcp-syncookie=no tcp-time-wait-timeout=10s udp-stream-timeout=3m udp-timeout=10s
/ip firewall nat
add action=masquerade chain=srcnat comment=“” disabled=no out-interface=ether1
/ip firewall service-port
set ftp disabled=no ports=21
set tftp disabled=no ports=69
set irc disabled=no ports=6667
set h323 disabled=no
set sip disabled=no ports=5060,5061
set pptp disabled=no
/ip neighbor discovery
set ether1 discover=yes
set ether2 discover=yes
set ether3 discover=yes
set ether4 discover=yes
set ether5 discover=yes
set pppoe-out1 discover=no
/ip proxy
set always-from-cache=no cache-administrator=webmaster cache-hit-dscp=4 cache-on-disk=no enabled=no max-cache-size=none max-client-connections=600 max-fresh-time=3d max-server-connections=600 parent-proxy=0.0.0.0
parent-proxy-port=0 port=8080 serialize-connections=no src-address=0.0.0.0
/ip service
set telnet address=0.0.0.0/0 disabled=no port=23
set ftp address=0.0.0.0/0 disabled=no port=21
set www address=0.0.0.0/0 disabled=no port=80
set ssh address=0.0.0.0/0 disabled=no port=22
set www-ssl address=0.0.0.0/0 certificate=none disabled=yes port=443
set api address=0.0.0.0/0 disabled=yes port=8728
set winbox address=0.0.0.0/0 disabled=no port=8291
/ip socks
set connection-idle-timeout=2m enabled=no max-connections=200 port=1080
/ip traffic-flow
set active-flow-timeout=30m cache-entries=4k enabled=no inactive-flow-timeout=15s interfaces=all
/ip upnp
set allow-disable-external-interface=yes enabled=no show-dummy-rule=yes
Apparently I had entered the IP address as the relay at some point… oh well.