[Bug 258949] IPv4 alias on Chelsio T6225-CR, ping: sendto: No route to host
Date: Tue, 05 Oct 2021 16:15:06 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258949 Bug ID: 258949 Summary: IPv4 alias on Chelsio T6225-CR, ping: sendto: No route to host Product: Base System Version: 13.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: jasonmader@gmail.com FreeBSD 13.0-RELEASE-p4 I haven't been able to recreate this on anything other than a system with the Chelsio T6225-CR, but an IPv4 alias only (IPv6 aliases work fine) with a /32 netmask such as, 129.174.130.141/32, doesn't work, cc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 9000 options=6e80723<RXCSUM,TXCSUM,JUMBO_MTU,TSO4,TSO6,LRO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6,HWRXTSTMP,NOMAP> inet 129.174.130.140 netmask 0xffffffe0 broadcast 129.174.130.159 inet 129.174.130.141 netmask 0xffffffff broadcast 129.174.130.141 PING 129.174.130.141 (129.174.130.141): 56 data bytes ping: sendto: No route to host But change the netmask to /31 and the ping will work. ifconfig_cc0="inet 129.174.130.140/27 mtu 9000" ifconfig_cc0_alias0="inet 129.174.130.141/32" Internet: Destination Gateway Flags Netif Expire 129.174.130.128/27 link#1 U cc0 129.174.130.140 link#1 UHS lo0 129.174.130.141 link#1 UH cc0 On FreeBSD 11.2 with an Intel interface it would have looked like, 129.174.130.128/27 link#1 U ix0 129.174.130.140 link#1 UHS lo0 129.174.130.141 link#1 UHS lo0 129.174.130.141/32 link#1 U ix0 t6nex0: <Chelsio T6225-CR> mem 0xdb200000-0xdb27ffff,0xda000000-0xdaffffff,0xdb684000-0xdb685fff irq 120 at device 0.4 on pci12 cc0: <port 0> on t6nex0 cc1: <port 1> on t6nex0 t6nex0: PCIe gen3 x8, 2 ports, 22 MSI-X interrupts, 70 eq, 21 iq -- You are receiving this mail because: You are the assignee for the bug.