Bug 204903

Summary:	unable to create vrf interface when ipv6.disable=1
Product:	Networking	Reporter:	zhangyoufu
Component:	Other	Assignee:	Stephen Hemminger (stephen)
Status:	NEW ---
Severity:	normal	CC:	dsahern
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	5.2.14	Subsystem:
Regression:	No	Bisected commit-id:

Description zhangyoufu 2019-09-18 15:15:42 UTC

`ip link add vrf0 type vrf table 100` fails with EAFNOSUPPORT when boot with `ipv6.disable=1`. There must be somewhere inside `vrf_newlink` trying to use IPv6 without checking availablity. Maybe `vrf_add_fib_rules` I guess.

Comment 1 David Ahern 2019-09-27 19:01:29 UTC

Fixed in net tree. Commit:
dac91170f8e9 vrf: Do not attempt to create IPv6 mcast rule if IPv6 is disabled