stateless trex cannot connect to RPC server

Guoliang Han

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Dec 19, 2017, 6:09:29 AM12/19/17

to TRex Traffic Generator

Hi team:

I am new to stateless Trex and I encounter a simple problem but cannot solve it.

Thanks in advance for your help.

trex@client-trex:~/trex-v2.32$ uname -a

Linux client-trex 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19) x86_64 GNU/Linux

trex@client-trex:~/trex-v2.32$ ./trex-console -v

Using 'python' as Python interpeter

Connecting to RPC server on localhost:4501

[verbose] Sending Request To Server:

{

"id": "dq8yshve",

"jsonrpc": "2.0",

"method": "api_sync_v2",

"params": {

"major": 4,

"minor": 1,

"name": "STL"

}

[FAILED]

Log:

*** [RPC] - Failed to get server response from tcp://localhost:4501

but I have run ./t-rex-64 -i and I can see the ports open.

trex@client-trex:~/trex-v2.32$ ss -uta

Netid State Recv-Q Send-Q Local Address:Port Peer Address:Port

udp UNCONN 0 0 *:sunrpc *:*

udp UNCONN 0 0 *:725 *:*

udp UNCONN 0 0 127.0.0.1:756 *:*

udp UNCONN 0 0 *:52639 *:*

udp UNCONN 0 0 :::sunrpc :::*

udp UNCONN 0 0 :::725 :::*

udp UNCONN 0 0 :::35789 :::*

tcp LISTEN 0 100 *:4500 *:*

tcp LISTEN 0 100 *:4501 *:*

tcp LISTEN 0 128 *:ssh *:*

tcp LISTEN 0 128 *:58425 *:*

tcp LISTEN 0 100 *:4507 *:*

tcp LISTEN 0 128 *:sunrpc *:*

tcp ESTAB 0 0 192.168.64.2:ssh 192.168.64.140:35098

tcp ESTAB 0 1788 192.168.64.2:ssh 192.168.64.140:35562

tcp LISTEN 0 128 :::ssh :::*

tcp LISTEN 0 128 :::37741 :::*

tcp LISTEN 0 128 :::sunrpc :::*

tcp LISTEN 0 128 :::http :::*

Anton Kiselev

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Dec 19, 2017, 6:38:15 AM12/19/17

to Guoliang Han, TRex Traffic Generator

Hi,

could you try same with 'nc -v -l 4500' and 'nc -v localhost 4500' to see if TCP is working fine?

also you may want to ensure there is no iptables blocking trex ports

iptables -F can be used to flush rules if any

Thanks,

Anton

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JS

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Mar 13, 2019, 2:24:15 PM3/13/19

to TRex Traffic Generator

Hi, I am seeing the same issue on centos 7.4. These ports are available and not used by any process. I have uninstalled firewalld and disabled selinux. Any suggestion?

host# nc -v localhost 4501

Ncat: Version 7.50 ( https://nmap.org/ncat )

Ncat: Connection to ::1 failed: Connection refused.

Ncat: Trying next address...

Ncat: Connection refused.

host# nc -v localhost 4500

Ncat: Version 7.50 ( https://nmap.org/ncat )

Ncat: Connection to ::1 failed: Connection refused.

Ncat: Trying next address...

Ncat: Connection refused.

host# nc -v -l 4500

Ncat: Version 7.50 ( https://nmap.org/ncat )

Ncat: Listening on :::4500

Ncat: Listening on 0.0.0.0:4500

^[[A^C

host# nc -v -l 4501

Ncat: Version 7.50 ( https://nmap.org/ncat )

Ncat: Listening on :::4501

Ncat: Listening on 0.0.0.0:4501

^C

host#

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JS

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Mar 13, 2019, 2:37:13 PM3/13/19

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host v2.53]# ./trex-console -v

Using 'python' as Python interpeter

Log:

*** [RPC] - Failed to get server response from tcp://localhost:4501

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