‘学习笔记’ 分类存档

Deploy TRex in Centos7.4

TRex based on DPDK, have high performance for traffics generator scenario. TRex has two deployment scenarios, one is Stateless mode, another is Server/client mode. How different for them? As follow pic. Btw, TRex has a GUI tool that can easy config traffic pattern, but that only support in Stateless mode. For Server/Client mode, only CLI (you can reference “Linux SRv6实战 (第三篇) 多云环境下Overlay(VPP) 和Underlay整合测试 ” that use Server/Client mode). For the article, only focus on stateless mode and GUI tool. 



Deploy OpenVPN on OpenWRT

My VPS(Bandwagon) include OpenVPN script, but only support Centos6.x that version not good for docker (my blog deploy by docker Blog顺利完成搬家之Bandwagonhost VPS), so need to do by other scripts. OpenWRT config OpenVPN client has some different, so summary the info to the article for review.

But due to GFW, OpenVPN couldn’t establish at last, reset happened between server and client, but the setup should workable.

Deploy OpenVPN at Server

Don’t know why couldn’t find OpenVPN pacakage by yum, even if have epel source

[root@frank ~]# rpm -qa |grep epel
[root@frank ~]# yum install openvpn
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base:
 * extras:
 * updates:
No package openvpn available.
Error: Nothing to do



Direct activate XRv9k Smart License

Config call-home that active smart license

xrv9k should have some default call-home, in some scenario, need to add some extra configuration, as follow:

domain name
domain name-server x.x.x.x  >>> dns server
 service active
 contact smart-licensing
 http-proxy y.y.y.y port 80  >>> proxy server
 profile CiscoTAC-1
  destination transport-method http

Add crypto config

crypto ca trustpool policy crl optional



OpenR on NCS5500

For detail info, please refer to following  Akshat’s article, for my article only simply summary step to build openr on ncs5500. Thanks Akshat’s help for the openr set up 🙂

1. Set up the private insecure registry on your server

Refer as follow:

[root@nso ~]# nano /etc/yum.repos.d/docker.repo
[root@nso ~]# yum install docker-engine 
[root@nso ~]# systemctl start docker
[root@nso ~]# docker run -d -p 5000:5000 --restart=always --name registry registry:2
[root@nso ~]# docker pull akshshar/openr-xr
[root@nso ~]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
c4636568f48a        registry:2          "/ /e..."   6 minutes ago       Up 6 minutes>5000/tcp   registry

[root@nso ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
registry            2                   f32a97de94e1        13 days ago         25.8MB
akshshar/openr-xr   latest              b51c260b060e        2 months ago        1.76GB

[root@nso ~]# docker tag akshshar/openr-xr
[root@nso ~]# docker images
REPOSITORY                  TAG                 IMAGE ID            CREATED             SIZE
registry                    2                   f32a97de94e1        13 days ago         25.8MB
akshshar/openr-xr           latest              b51c260b060e        2 months ago        1.76GB   latest              b51c260b060e        2 months ago        1.76GB
[root@nso ~]# docker push
The push refers to a repository []
Get http: server gave HTTP response to HTTPS client
[root@nso ~]# 

2. Add follow at “/etc/sysconfig/docker”

After changing the docker opts, please wait some seconds, docker will auto restart.

DOCKER_OPTS=" --insecure-registry"



How To Get Telemetry sensor path for show cmd on IOS XR?

When we want to collect some show information by Telemetry, we will face the 1st question that how to find the correct/resolved sensor path. The first step often traps us. Is there any good way to easily find the sensor path? The answer is “Yes”. I had summarized a way that can help you quickly find the sensor path.

Before read the article,there is a file that mapping between YANG and Sensor Path in XR, you can check by keyword(e.g fan, cpu and so on) first, if not found, then check my article.

Tue Jan 22 06:58:56.512 UTC
[xr-vm_node0_RP0_CPU0:~]$cd /pkg/telemetry/mdt/protogen

yang_to_Schema.txt has all yang path to xml schema path maps.


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