White Paper
Technical white paper | HPN SDN Controller Link Discovery
Please see the tables below for details about whether your network configuration will meet either of the above conditions:
Discovery packet injection
Product Tagging of Controller-Injected Packets
ProVision
In
aggregation
mode, the switch Openflow agent does not apply a tag to injected
link discovery packets.
In
virtualization
mode, the switch Openflow agent adds a tag for the vlan of the
instance to controller-injected discovery packets when the packet egresses a
tagged port.
Comware
The switch Openflow agent does not apply a tag to injected link discovery packets.
Other Vendors
See vendor-specific documentation regarding 802.1Q vlan tagging of controller-
injected packets.
Discovery packet reception
Product Reception of Untagged Packets
ProVision
Untagged
direct
discovery packets are properly stolen to the controller.
Untagged
multi-hop
discovery packets are associated with the untagged vlan on
the port where they are received and properly stolen to the controller.
Comware
Untagged
direct
discovery packets are properly stolen to the controller if the
Comware device is running a revision of firmware which has resolved issue
201402110424 (ex: 5503L01 for 5500HI) and the pvid on each inter-switch port
is configured with the correct OpenFlow instance.
Untagged
multi-hop
discovery packets are properly stolen to the controller if the
ingress ports have the correct pvid configured that associates untagged packets
with the correct OpenFlow instance vlan.
NOTE: The inter-switch ports in an OpenFlow instance MUST NOT be configured
with “bpdu-drop any” since the direct link discovery packet MAC is in the BPDU
MAC range.
Other Vendors
See vendor-specific documentation regarding handling of untagged
direct
and
multi-hop
discovery packets shown above.
Non-conforming configuration example
Vlan 2
Untag 3
Vlan 1, 2
Untag ??
Vlan 1
Vlan 2
Controller
1
2
1
2
1 2
2
1
Switch A
Switch B
Switch C
Uncontrolled
Switch
OF Inst Ax:
Vlan 1, 2
OF Inst Bx:
Vlan 1, 2
OF Inst Cx:
Vlan 1
OF Inst Cy:
Vlan 2
3
Non-OpenFlow
Network
Vlan 3
4