Date: Wed, 13 Jun 2018 10:17:06 +0300 From: "Andrey V. Elsukov" <bu7cher@yandex.ru> To: rgrimes@freebsd.org Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r334875 - head/sys/net Message-ID: <f3118703-874d-a493-bfdd-c65e76fd97a5@yandex.ru> In-Reply-To: <201806091226.w59CQDSb018933@pdx.rh.CN85.dnsmgr.net> References: <201806091226.w59CQDSb018933@pdx.rh.CN85.dnsmgr.net>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --g6BMwXcbPiB6Lmsw2vprqidkiofrwEEIl Content-Type: multipart/mixed; boundary="npdWcDhDIqPwT0xGtS5HRSU47XXLeAEJN"; protected-headers="v1" From: "Andrey V. Elsukov" <bu7cher@yandex.ru> To: rgrimes@freebsd.org Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Message-ID: <f3118703-874d-a493-bfdd-c65e76fd97a5@yandex.ru> Subject: Re: svn commit: r334875 - head/sys/net References: <201806091226.w59CQDSb018933@pdx.rh.CN85.dnsmgr.net> In-Reply-To: <201806091226.w59CQDSb018933@pdx.rh.CN85.dnsmgr.net> --npdWcDhDIqPwT0xGtS5HRSU47XXLeAEJN Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 09.06.2018 15:26, Rodney W. Grimes wrote: >> Author: ae >> Date: Sat Jun 9 09:57:14 2018 >> New Revision: 334875 >> URL: https://svnweb.freebsd.org/changeset/base/334875 >> >> Log: >> Explicitly change the link state when we assingn an address. >> =20 >> Since we are setting IFF_UP flag on SIOCSIFADDR, it is possible, tha= t >> after this link state information still not initialized properly. >> This leads to problems with routing, since now interface has >> IFCAP_LINKSTATE capability and a route is considered as working only= >> when interface's link state is in LINK_STATE_UP (see RT_LINK_IS_UP()= >> macro). >=20 > I was going to say something when the ability to up and down > the loopback interfaces was added as it perturbed me but I > could not put my finger on places it may cause problems so > remained silent on the matter. >=20 > Now that I see this issue, having lo0 go DOWN can kill a network > that is using exported from lo0 into a routing protocol routes that=20 > are used for management purposes. This was one of the main reasons of this change. > How does Cisco, Juniper, etc at handle this? > Do any of them or all of them allow you to "down" loopback? AFAIK, they allow this. --=20 WBR, Andrey V. Elsukov --npdWcDhDIqPwT0xGtS5HRSU47XXLeAEJN-- --g6BMwXcbPiB6Lmsw2vprqidkiofrwEEIl Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEzBAEBCAAdFiEE5lkeG0HaFRbwybwAAcXqBBDIoXoFAlsgxPIACgkQAcXqBBDI oXq7Kgf+JsmByV3u2e2rZR7QwiNxXmXfYOXzrQZ7dgAvguHur7fWHpBb5JIL9XE8 w83DDBXqyq2pc6QjoKZ6D4qc44dss070yUCSY+lEGxIY4JvKylmXSy3rZyU92wD9 RtmTDzdvyoiEfBSLsOAvDvZmcURODeaf42jHNvnMDVcFSPZU8dPLClYQYbiFcI8M 58o/e3a3etyruZ3Eh/U6Dju4hRi61SScP2uhRF5M1xMmXOcHVtj9IZKPMs/o0rlA OLjcyZ30Aktj6aJ91ktSA0alIqcozfNnRRdUgfkh45pxf29BgeeGeuOmR8q9PFB1 sDnWGyxLuiqJQqktwN7IA7v9i8tcXA== =XSJY -----END PGP SIGNATURE----- --g6BMwXcbPiB6Lmsw2vprqidkiofrwEEIl--
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