Bug 1811119
Summary: | OVN is not adhering to DHCP Broadcast Bit in DHCPDISCOVER and sending only unicast DHCPOFFER | |||
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Product: | Red Hat Enterprise Linux Fast Datapath | Reporter: | Ihar Hrachyshka <ihrachys> | |
Component: | ovn2.11 | Assignee: | Ihar Hrachyshka <ihrachys> | |
Status: | CLOSED ERRATA | QA Contact: | ying xu <yinxu> | |
Severity: | medium | Docs Contact: | ||
Priority: | medium | |||
Version: | RHEL 7.7 | CC: | apevec, ctrautma, ekuris, fiezzi, ihrachys, jlibosva, ldenny, lhh, majopela, mmichels, scohen | |
Target Milestone: | --- | Keywords: | Triaged, ZStream | |
Target Release: | --- | |||
Hardware: | Unspecified | |||
OS: | Unspecified | |||
Whiteboard: | ||||
Fixed In Version: | ovn2.11-2.11.1-36.el7fdn | Doc Type: | If docs needed, set a value | |
Doc Text: | Story Points: | --- | ||
Clone Of: | 1801006 | |||
: | 1812038 (view as bug list) | Environment: | ||
Last Closed: | 2020-04-14 14:29:49 UTC | Type: | --- | |
Regression: | --- | Mount Type: | --- | |
Documentation: | --- | CRM: | ||
Verified Versions: | Category: | --- | ||
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | ||
Cloudforms Team: | --- | Target Upstream Version: | ||
Embargoed: | ||||
Bug Depends On: | 1801006 | |||
Bug Blocks: | 1811117, 1812038 |
Comment 1
Ihar Hrachyshka
2020-03-07 02:28:05 UTC
I can reproduce this bug on version: # rpm -qa|grep ovn ovn2.11-central-2.11.1-33.el8fdp.x86_64 ovn2.11-2.11.1-33.el8fdp.x86_64 ovn2.11-host-2.11.1-33.el8fdp.x86_64 and verified on version ovn2.11-central-2.11.1-37.el8fdp.x86_64 ovn2.11-2.11.1-37.el8fdp.x86_64 ovn2.11-host-2.11.1-37.el8fdp.x86_64 server: local dhcp_102=$(ovn-nbctl create DHCP_Options cidr=42.42.42.0/24 \ options="\"server_id\"=\"42.42.42.254\" \"server_mac\"=\"00:de:ad:ff:01:02\" \ \"lease_time\"=\"3600\" \"router\"=\"42.42.42.254\"") echo $dhcp_102 ovn-nbctl ls-add ls ovn-nbctl lsp-add ls vm1 ovn-nbctl lsp-set-addresses vm1 "00:00:00:00:00:01 42.42.42.2" rlRun "ovn-nbctl lsp-set-dhcpv4-options vm1 $dhcp_102" rlRun "ovn-nbctl lsp-get-dhcpv4-options vm1" ovn-nbctl lsp-add ls vm2 ovn-nbctl lsp-set-addresses vm2 "00:00:00:00:00:02 42.42.42.3" rlRun "ovn-nbctl lsp-set-dhcpv4-options vm2 $dhcp_102" rlRun "ovn-nbctl lsp-get-dhcpv4-options vm2" ip netns add vm1 ovs-vsctl add-port br-int vm1 -- set interface vm1 type=internal ip link set vm1 netns vm1 ip netns exec vm1 ip link set vm1 address 00:00:00:00:00:01 ip netns exec vm1 ip link set vm1 up ip netns exec vm1 ip link set lo up ovs-vsctl set Interface vm1 external_ids:iface-id=vm1 client: ip netns add vm2 ovs-vsctl add-port br-int vm2 -- set interface vm2 type=internal ip link set vm2 netns vm2 ip netns exec vm2 ip link set vm2 address 00:00:00:00:00:02 ip netns exec vm2 ip link set vm2 up ip netns exec vm2 ip link set lo up ovs-vsctl set Interface vm2 external_ids:iface-id=vm2 rlRun "ip netns exec vm2 tcpdump -U -i vm2 -w a.pacp&" sleep 5 then send packet asbelow: conf.checkIPaddr = False fam,hw =get_if_raw_hwaddr(conf.iface) sendp(Ether(src="00:00:00:00:00:02", dst="ff:ff:ff:ff:ff:ff")/IP(src="0.0.0.0", dst="255.255.255.255")/UDP(sport=68,dport=67)/BOOTP(flags=32768,chaddr=hw)/DHCP(options=[("message-type","discover"),"end"]),iface="vm2") pkill -9 tcpdump tcpdump -r a.pacp -nn -v |grep 42.42.42.254.67.*255.255.255.255.*BOOTP/DHCP.*Reply' reading from file a.pacp, link-type EN10MB (Ethernet) 42.42.42.254.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, length 276, Flags [Broadcast] on the old version, the reply packet is a unicast packet. # tcpdump -r b.pacp -nn -v reading from file b.pacp, link-type EN10MB (Ethernet) 04:34:56.679758 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP (17), length 272) 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:00:00:00:00:02, length 244, Flags [Broadcast] Client-Ethernet-Address 00:00:00:00:00:02 Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Discover 04:34:56.681402 IP (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto UDP (17), length 304) 42.42.42.254.67 > 42.42.42.3.68: BOOTP/DHCP, Reply, length 276, Flags [Broadcast] Your-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: Offer Lease-Time Option 51, length 4: 3600 Subnet-Mask Option 1, length 4: 255.255.255.0 Default-Gateway Option 3, length 4: 42.42.42.254 Server-ID Option 54, length 4: 42.42.42.254 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, 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-2020:1458 |