IBM Storwize V7000 Unified Problem Determination Manual page 184

Ensure that you use trunk, access link, or native VLAN consistently on the switch
ports that are connected to all ports on the clustered system. The clustered system
shares the same VLAN subnet. Avoid defining the same VLAN with a tag ID
either different or missing, when providing the VLAN ID to a management
network bond, as well as to a shared data network bond.
Unless you have intentionally configured your switching network to support this
unique case, where the VLAN ID for the management network and data network
are not the same and you are confident on how this will be routed from the
clustered system to your switch, you might incur unpredictable routing path
behavior and even network connectivity loss.
See the following examples.
Scenario 1
lsnwgroup returns:
[root@kd66t4v.mgmt001st001 ~]# lsnwgroup
Network Group Nodes
DEFAULT
EFSSG1000I The command completed successfully.
and lsnwmgt returns:
[root@kd52v6k.mgmt001st001 ~]# lsnwmgt
Interface Service IP Node1 Service IP Node2 Management IP Network Gateway VLAN ID
ethX0
EFSSG1000I The command completed successfully.
None of the interfaces is attached and the management network uses interface
ethX0. If any ethX1 port cable is unplugged, the health center displays a failure
because no network is attached to an interface, which causes the system to monitor
all ports.
Scenario 2
lsnwgroup returns:
[root@kd52v6k.mgmt001st001 ~]# lsnwgroup
Network Group Nodes
DEFAULT
EFSSG1000I The command completed successfully.
and lsnwmgt returns:
[root@kd52v6k.mgmt001st001 ~]# lsnwmgt
Interface Service IP Node1 Service IP Node2 Management IP Network Gateway VLAN ID
ethX0
EFSSG1000I The command completed successfully.
The interface ethX0 is attached to a network and the management network uses
ethX0. If any ethX1 port cable is unplugged, the health center does not display a
failure, because ethX1 is not used by either an attached network or the
management network.
Scenario 3
lsnwgroup returns:
[root@kd52v6k.mgmt001st001 ~]# lsnwgroup
Network Group Nodes
DEFAULT
EFSSG1000I The command completed successfully.
and lsnwmgt returns:
[root@kd52v6k.mgmt001st001 ~]# lsnwmgt
Interface Service IP Node1 Service IP Node2 Management IP Network Gateway VLAN ID
ethX1
EFSSG1000I The command completed successfully.
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Storwize V7000 Unified: Problem Determination Guide 2073-720
mgmt001st001,mgmt002st001
. . . . . .
mgmt001st001,mgmt002st001 ethX0
. . . . . .
mgmt001st001,mgmt002st001 ethX0
. . . . . .
Interfaces
. . . . . .
Interfaces
. . . . . .
Interfaces
. . . . . .
. . .
. . .
. . .