[LU-10930] lnet module parameter "forwarding" does not enable routing

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.11.0
• Labels: llnl
• Environment: Red Hat Enterprise Linux Server release 7.5 Beta (Maipo); Linux 4.14.0-43.el7a.aarch64
• Severity: 3
• Assignee: Sonia Sharma (Inactive)
• Reporter: Olaf Faaland

Description

options lnet forwarding="enabled"

Setting forwarding="enabled" in lnet modprobe conf file does not enable routing.  That is, after starting lnet with the configuration below, "lnetctl routing show" returns nothing.  Also, a compute node (also 2.11) with a route whose gateway is configured as below, shows the route is down.

The specific configuration tested was:

[root@ulna4:~]# cat /etc/modprobe.d/lnet.conf
options lnet forwarding="enabled"

and

[root@ulna4:~]# cat /etc/lnet.conf
ip2nets:

• net-spec: o2ib100
  interfaces:
  0: san0
  ip-range:
  0: 172.19.1.*
• net-spec: o2ib33
  interfaces:
  0: hsi0
  ip-range:
  0: 192.168.128.*
  route:
  <routes redacted>