CRAY System Management - Guides and References > Network Stack (Software and Hardware)

Network Stack (Software and Hardware)

This page will detail how to reload/reset interfaces within the network stack to fix wedged interfaces.

Any process covered on this page will be covered by the installer.

Network Interfaces

The NCNs have network device names set during first boot. The names vary based on the available hardware. For more information, see NCN Networking.

Network Stack

There are a few daemons that makeup the SUSE network stack:

Sorted by safest to touch relative to keeping your SSH connection up.

wickedd.service : The daemons handling each interface ; resetting this clears stale configuration.

# Restarts Wicked daemons without reconfiguring the network interfaces.
ncn# systemctl restart wickedd

wicked.service : The overarching service for spawning daemons and manipulating interface configuration; resetting this reloads daemons and configuration.
```
# Restarts Wicked; respawns daemons and (re)configures the network.
ncn# systemctl restart wicked
```
network.service : Responsible for network configuration per interface; does not reload Wicked.

NOTE: Commonly the problem exists within Wicked, this is a last resort in the event the configuration is so bad Wicked cannot handle it.
```
# Restart the network interface configuration, but leaves wicked daemons alone.
ncn# systemctl restart network
```

Use Cases for Resetting Services:

Interfaces not showing up
IP Addresses not applying
Member/children interfaces not being included

Command Reference

Interface Information

# Check interface status (up/down/broken)
ncn# wicked ifstatus

# Show routing and status for all devices
ncn# wicked ifstatus --verbose all
lo              up
      link:     #1, state up
      type:     loopback
      control:  persistent
      config:   compat:suse:/etc/sysconfig/network/ifcfg-lo,
                uuid: 6ad37e59-72d7-5988-9675-93b8df96d9f6
      leases:   ipv4 static granted
      leases:   ipv6 static granted
      addr:     ipv4 127.0.0.1/8 scope host label lo [static]
      addr:     ipv6 ::1/128 scope host [static]
      route:    ipv6 ::1/128 type unicast table main scope universe protocol kernel priority 256

em1             device-unconfigured
      link:     #2, state down, mtu 1500
      type:     ethernet, hwaddr a4:bf:01:48:1f:dc
      config:   none

em2             device-unconfigured
      link:     #3, state down, mtu 1500
      type:     ethernet, hwaddr a4:bf:01:48:1f:dd
      config:   none

mgmt0           enslaved
      link:     #4, state up, mtu 9000, master bond0
      type:     ethernet, hwaddr b8:59:9f:f9:1c:8e
      control:  none
      config:   compat:suse:/etc/sysconfig/network/ifcfg-mgmt0,
                uuid: 7175c041-ee2b-5ce2-a4d7-67fa6cb94a17

mgmt1           device-unconfigured
      link:     #5, state up, mtu 9000, master bond0
      type:     ethernet, hwaddr b8:59:9f:f9:1c:8e
      config:   none

bond0           device-unconfigured
      link:     #6, state up, mtu 9000
      type:     bond, mode ieee802-3ad, hwaddr b8:59:9f:f9:1c:8e
      config:   none
      addr:     ipv6 fe80::ba59:9fff:fef9:1c8e/64 scope link
      route:    ipv6 fe80::/64 type unicast table main scope universe protocol kernel priority 256

vlan002         device-unconfigured
      link:     #7, state up, mtu 9000
      type:     vlan bond0[2], hwaddr b8:59:9f:f9:1c:8e
      config:   none
      addr:     ipv4 10.252.2.2/17 brd 10.252.2.2 scope universe label vlan002
      addr:     ipv6 fe80::ba59:9fff:fef9:1c8e/64 scope link
      route:    ipv4 0.0.0.0/0 via 10.252.1.1 dev vlan002 type unicast table main scope universe protocol boot
      route:    ipv4 10.252.0.0/17 type unicast table main scope link protocol kernel pref-src 10.252.2.2
      route:    ipv6 fe80::/64 type unicast table main scope universe protocol kernel priority 256

vlan004         device-unconfigured
      link:     #8, state up, mtu 9000
      type:     vlan bond0[4], hwaddr b8:59:9f:f9:1c:8e
      config:   none
      addr:     ipv4 10.254.2.2/17 brd 10.254.2.2 scope universe label vlan004
      addr:     ipv6 fe80::ba59:9fff:fef9:1c8e/64 scope link
      route:    ipv4 10.254.0.0/17 type unicast table main scope link protocol kernel pref-src 10.254.2.2
      route:    ipv6 fe80::/64 type unicast table main scope universe protocol kernel priority 256

vlan007         device-unconfigured
      link:     #9, state up, mtu 9000
      type:     vlan bond0[7], hwaddr b8:59:9f:f9:1c:8e
      config:   none
      addr:     ipv4 10.102.9.12/24 brd 10.102.9.12 scope universe label vlan007
      addr:     ipv6 fe80::ba59:9fff:fef9:1c8e/64 scope link
      route:    ipv4 10.102.9.0/24 type unicast table main scope link protocol kernel pref-src 10.102.9.12
      route:    ipv6 fe80::/64 type unicast table main scope universe protocol kernel priority 256

eth0            no-device
# Print real devices ( ignore no-device )
ncn# wicked show --verbose all

Network Service

# Shows the currently enabled network service (Wicked or Network Manager)
ncn# systemctl show -p Id network.service
Id=wicked.service