Hi, Mahmoud

First, rest_topology.py can find hosts only after the controller catch the packet from hosts.
OTOH, by the default, rest_firewall.py drops all packets at the switch.
So, rest_topology.py could not find any hosts, because it catch no packet from hosts.

To find hosts, you need to:
    * enable the switch in order not to drop all packets
https://osrg.github.io/ryu-book/en/html/rest_firewall.html#changing-in-the-initial-state
    * send packets from hosts in order to notify the host exists

Thanks,
Fujimoto

On 2017年06月21日 10:37, Mahmoud Elzoghbi wrote:
It responses with empty list

On Jun 21, 2017 3:12 AM, "Fujimoto Satoshi" <satoshi.fujimo...@gmail.com <mailto:satoshi.fujimo...@gmail.com>> wrote:

    Hi, Mahmoud

    Sorry, but I can't solve your problem without more information.
    I want to know how you ran apps, it is needed to reproduce your
    problem.
    So, could you tell me the command which you ran?

    And, what "doesn't work" means?
    It replies with empty list, or responds with 404?
    It is helpful for me to tell me the response from rest_topology.py.

    Thanks,
    Fujimoto

    On 2017年06月21日 07:42, Mahmoud Elzoghbi wrote:
    Rest_topology.py module help me to get all hosts ' s mac address
    and ipv4 address by using rest request
    (http:/localhost:8080/v1.0/topology/hosts
    <http:/localhost:8080/v1.0/topology/hosts>).
    My problem is when i run Rest_topology.py with simple_switch.py
    it works fine and get all hosts' s mac address but when I run
    Rest_topology.py with rest_firewall.py It doesn't work.

    On Jun 20, 2017 6:21 AM, "Fujimoto Satoshi"
    <satoshi.fujimo...@gmail.com
    <mailto:satoshi.fujimo...@gmail.com>> wrote:

        Hi, Mahmoud

        Sorry, I couldn't reproduce your problem...

        For further inspection, could you tell me the following? :
            * The command which you ran
            * Log messages of Ryu with '--verbose' option
            * Diff of rest_firewall.py, if you modified rest_firewall.py

        Thanks,
        Fujimoto

        On 2017年06月19日 10:15, Mahmoud Elzoghbi wrote:
        when i run rest_firewall.py with rest_topology,py , i use
        Rest request (http:://localhost:8080/v1.0/topology/hosts) to
        get all hosts that connect with the switch but these request
        doesn't work (no response from this request).

        do you have any idea for this problem..


        
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