Hosts can ping though HP 3800 but no flows installed in the controller

[PaulTG]

Hi all.

We are using HP 3800 switches with controller version 2.0 and Openflow version 1.0.

We have connection between the controller and one switch within an openflow channel.

Attached to that switch we have two hosts that can ping each other. But no flow appears on the controller, unlike the initial tests that we have made with mininet with the default applications installed.

Maybe we are not configuring well the switch to communicate only with openflow. Or is this a natural behavior? It’s strange that the hosts can communicate with each other without flows installed on the controller. It's like the switch is behaving only as a legacy switch.

Can you help us figuring out the reason for this?

Below, we send the running-config of the switch. The hosts are connected on interface 5 and 6 which are on VLAN 20 (the openflow vlan). The controller VLAN is VLAN 1000. VLAN 10 is only for ssh connection.

Show run

hostname "HP-3800-A"

module 1 type j9573x

no telnet-server

snmp-server community "public" unrestricted

openflow

   controller-id 1 ip 172.16.1.254 controller-interface vlan 1000

   instance "of_instance"

      listen-port

      member vlan 20

      controller-id 1

      max-backoff-interval 5

      enable

      exit

   enable

   exit

oobm

   ip address dhcp-bootp

   exit

vlan 1

   name "DEFAULT_VLAN"

   no untagged 1-2,4-20

   untagged 3,21-26

   ip address dhcp-bootp

   exit

vlan 10

   name "VLAN10"

   untagged 2

   tagged 1,3

   ip address 10.1.0.15 255.255.255.0

   exit

vlan 20

   name "VLAN20"

   untagged 4-20

   no ip address

   exit

vlan 1000

   name "VLAN1000"

   tagged 1

   ip address 172.16.1.15 255.255.255.0

   exit

no autorun

no dhcp config-file-update

no dhcp image-file-update

password manager

password operator

show openflow controllers

Controller Information

Controller Id IP Address               Port   Interface    

 ------------- ------------------------ ------ --------------

1             172.16.1.254             6633   VLAN 1000    

show openflow instance of_instance   

Configured OF Version    : 1.0      

 Negotiated OF Version    : 1.0 

 Instance Name            : of_instance                     

 Admin. Status            : Enabled

 Member List              : VLAN 20            

 Listen Port              : 6653          

 Oper. Status             : Up     

 Oper. Status Reason      : NA                                     

 Datapath ID              : 0014a45d362ce800       

 Mode                     : Active   

 Flow Location            : Hardware and Software        

 No. of Hw Flows          : 0    

 No. of Sw Flows          : 0    

 Hw. Rate Limit           : 0 kbps             

 Sw. Rate Limit           : 100 pps       

 Conn. Interrupt Mode     : Fail-Secure        

 Maximum Backoff Interval : 5 seconds     

 Probe Interval           : 10 seconds    

 Hw. Table Miss Count     : 32                 

 No. of Sw Flow Tables    : NA

 Egress Only Ports        : None                                   

 Table Model              : Single Table                           

Controller Id Connection Status Connection State Secure Role 

 ------------- ----------------- ---------------- ------ ------

1             Connected         Active           No     Equal

Many thanks!

Best regards,

Paulo T Gouveia

[PaulTG]

Hi again.

We solved the problem. We rebooted the switch and the controller and now the flows are installed. The switch is behaving as expected with Openflow.

However, here rises another question. In the Openflow flow-statistics, we can see the packet counter increasing but the byte counter stays at zero. It doens't increase as packets are sent and received by the switch.

Can you help us figuring out the cause of this?

Thank you all,

Best regards,

Paulo T Gouveia

[sdnindia]

Hi Paulo T Gouveia,

Could you please provide the below details-

1.How are you adding the flows, by REST API or by some code? Please share the same.

2.Firmware version for the switch.

3.Screen shots for the Flow i.e. Flow response.

Thanks,

HP SDN Team