+++ This bug was initially created as a clone of Bug #1801258 +++ Description of problem: OVN DHCP server doesn't process DHCPINFORM packages from clients and silently drops them. P.S. Couldn't find OVN component for RHOSP.
verified on the latest version: # rpm -qa|grep ovn ovn2.11-2.11.1-53.el8fdp.x86_64 ovn2.11-host-2.11.1-53.el8fdp.x86_64 ovn2.11-central-2.11.1-53.el8fdp.x86_64 topo: vm1-------ls-----------vm2 send inform packet: sendp(Ether(src="00:00:00:00:00:02", dst="00:de:ad:ff:01:02")/IP(src='42.42.42.3',dst='42.42.42.254')/UDP(sport=68,dport=67)/BOOTP(ciaddr='42.42.42.3',chaddr=hw,xid=random.randint(0, 0xFFFFFFFF),)/DHCP(options=[("message-type","inform"),"end"]),iface="vm2") cat /var/log/ovn/ovn-controller.log|grep DHCPINFORM' 2020-07-14T07:59:29.949Z|00010|pinctrl(ovn_pinctrl0)|INFO|DHCPINFORM from 00:00:00:00:00:01 42.42.42.2 2020-07-14T08:00:00.189Z|00012|pinctrl(ovn_pinctrl0)|INFO|DHCPINFORM from 00:00:00:00:00:01 42.42.42.2 # tcpdump -r dhcp.pcap -nn -v reading from file dhcp.pcap, link-type EN10MB (Ethernet) 22:03:15.310978 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 16) fe80::200:ff:fe00:2 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 16 source link-address option (1), length 8 (1): 00:00:00:00:00:02 22:03:19.687679 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP (17), length 272) 42.42.42.3.68 > 42.42.42.254.67: BOOTP/DHCP, Request from 00:00:00:00:00:02, length 244, xid 0x6d00363e, Flags [none] Client-IP 42.42.42.3 Client-Ethernet-Address 00:00:00:00:00:02 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Inform 22:03:19.689269 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP (17), length 292) 42.42.42.254.67 > 42.42.42.3.68: BOOTP/DHCP, Reply, length 264, xid 0x6d00363e, Flags [none] Client-IP 42.42.42.3 Client-Ethernet-Address 00:00:00:00:00:02 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: ACK Default-Gateway Option 3, length 4: 42.42.42.254 Server-ID Option 54, length 4: 42.42.42.254 send release packet: sendp(Ether(src="00:00:00:00:00:01", dst="00:de:ad:ff:01:02")/IP(src='42.42.42.2',dst='42.42.42.254')/UDP(sport=68,dport=67)/BOOTP(ciaddr='42.42.42.2',chaddr=hw,xid=random.randint(0, 0xFFFFFFFF),)/DHCP(options=[("message-type","release"),("server_id",'42.42.42.254'),("client_id",chr(1),hw),"end"]),iface="vm1") #cat /var/log/ovn/ovn-controller.log|grep DHCPRELEASE' 2020-07-15T02:38:50.397Z|00008|pinctrl(ovn_pinctrl0)|INFO|DHCPRELEASE 00:00:00:00:00:01 42.42.42.2
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (ovn2.11 bug fix and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:3487