API to get port MAC address

[abhilash vellidandi]

Hi,

In my testing I am using multiple IP address for a single port, for this I am creating a stream to send GARP messages for each IP periodically. Currently I am manually fetching the MAC Address and updating in the packet details, is there any API we can use to get the MAC adress of the ports without needing to update them manually in case the port that is being used changes.

Below is the snipped from my script:

    garp_base_pkt = Ether(src="ec:9e:cd:19:13:95",dst="ff:ff:ff:ff:ff:ff")/ARP(hwsrc="ec:9e:cd:19:13:95",hwdst="ec:9e:cd:19:13:95")
    port0_range = {'src': {'start': "1.1.1.1", 'end': "1.1.1.17"}, 'vlan': {'start': 2222, 'end': 2222}}
    ip = port0_range['src']
    vlan = port0_range['vlan']
    garpvm = [ STLVmFlowVar(name="ip", min_value=ip['start'], max_value=ip['end'], size=4, step=4, op="inc"),
               STLVmWrFlowVar(fv_name="ip", pkt_offset="ARP.psrc"),
               STLVmWrFlowVar(fv_name="ip", pkt_offset="ARP.pdst"),
             ]
    garp_pkt = STLPktBuilder(garp_base_pkt, vm = garpvm)
    garp = STLStream(packet = garp_pkt, mode = STLTXCont(pps = 1))
    c.add_streams(garp, ports = 0)


Thanks in advance for your support.

Thanks and Regards,
Abhilash

[abhilash vellidandi]

Hi,

Could you please let me know if this is possible?

Thanks and Regards,
Abhilash

[Yaroslav Brustinov]

Hi,

If you will not use "src" in Ether class, upon sending of stream TRex will put MAC address of interface.

If you insist to put the MAC address yourself, you can query the port:

c.ports[port_id].get_ts_attr()['layer_cfg']['ether']['src']

Thanks,

Yaroslav.

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