Date: Mon, 08 Dec 2025 10:33:47 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 291420] [epair] Bad UDP packet checksum with epair(4) and txcsum enabled Message-ID: <bug-291420-7501-3xQmqg84Md@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-291420-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-291420-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291420 --- Comment #6 from Dmitry Lukhtionov <dmitryluhtionov@gmail.com> --- (In reply to Michael Tuexen from comment #4) On host machine ``` root@DL360_Gen9_m19:/home/mitya # sysctl sysctl dev.bge.1.forced_udpcsum=1 dev.bge.1.forced_udpcsum: 0 -> 1 root@DL360_Gen9_m19:/home/mitya # ifconfig bge1 down root@DL360_Gen9_m19:/home/mitya # ifconfig bge1 up root@DL360_Gen9_m19:/home/mitya # ifconfig bge1 bge1: flags=1008943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500 options=c009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,VLAN_HWTSO,LINKSTATE> ether c4:34:6b:b8:e4:39 inet 193.34.20.5 netmask 0xfffffff0 broadcast 193.34.20.15 media: Ethernet autoselect (1000baseT <full-duplex>) status: active nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> root@DL360_Gen9_m19:/home/mitya # ifconfig epair1a epair1a: flags=1008943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500 options=20000b<RXCSUM,TXCSUM,VLAN_MTU,RXCSUM_IPV6> ether 02:ef:5d:1e:0d:0a groups: epair media: Ethernet 10Gbase-T (10Gbase-T <full-duplex>) status: active nd6 options=9<PERFORMNUD,IFDISABLED> ``` Inside jail ``` root@mail:/ # ifconfig epair1b epair1b: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500 options=20000b<RXCSUM,TXCSUM,VLAN_MTU,RXCSUM_IPV6> ether 02:ef:5d:1e:0d:0b inet 193.34.20.8 netmask 0xfffffff0 broadcast 193.34.20.15 groups: epair media: Ethernet 10Gbase-T (10Gbase-T <full-duplex>) status: active nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> root@mail:/ # drill i.ua @193.34.20.4 ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 12682 ;; flags: qr rd ra ; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;; i.ua. IN A ;; ANSWER SECTION: i.ua. 21 IN A 104.18.2.81 i.ua. 21 IN A 104.18.3.81 ;; AUTHORITY SECTION: ;; ADDITIONAL SECTION: ;; Query time: 0 msec ;; SERVER: 193.34.20.4 ;; WHEN: Mon Dec 8 12:32:25 2025 ;; MSG SIZE rcvd: 54 ``` BUT ``` root@mail:/ # ping 193.34.20.5 PING 193.34.20.5 (193.34.20.5): 56 data bytes ^C --- 193.34.20.5 ping statistics --- 4 packets transmitted, 0 packets received, 100.0% packet loss root@mail:/ # ping 193.34.20.4 PING 193.34.20.4 (193.34.20.4): 56 data bytes 64 bytes from 193.34.20.4: icmp_seq=0 ttl=64 time=0.482 ms 64 bytes from 193.34.20.4: icmp_seq=1 ttl=64 time=0.283 ms 64 bytes from 193.34.20.4: icmp_seq=2 ttl=64 time=0.479 ms 64 bytes from 193.34.20.4: icmp_seq=3 ttl=64 time=0.323 ms ^C --- 193.34.20.4 ping statistics --- 4 packets transmitted, 4 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 0.283/0.392/0.482/0.090 ms ``` -- You are receiving this mail because: You are the assignee for the bug.help
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