Inter-domain traffic steering solution with EPE and XTC ODN

Introduction

 

Now more customer complains their Peering network not flexible and hard to control, that will cause peering link’s utilization not balance and waste of resources. As follow the example on Router-2, customer peering device connect to multi ISP, each ISP sends full internet route, select only based on the BGP. BGP select rule only based on the route but not real traffics, that may be cause port-A’s traffics have 8G, but port-B and port-C only have 4G, if want to adjust BGP select, only change RPL that more complex, and due to route from internet and multi ISP, so route maybe change at some time, in order to balance peering link, customer must continue to adjust their RPL.

Could we have more flexible and simplest way to resolve the issue? The answer is Yes 🙂 we can achieve the task by Segment Routing – Egress Peer Engineering. Now some customer had deployed the solution, that combine NetFlow, Openbmp to check AS/traffics of prefix, then send BGP LU(EPE label) to ingress node, and easy to control traffics.

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Install and deploy Cisco WAE 7.1.1

Introduction

I installed the WAE 6.4.5 at formal and summaried to Blog, e.g: INSTALL CISCO WAE 6.4.5. After 7.0, install/config have big change and similar with NSO that easy/module to deploy. For this article, only talk about how to install and enable.

Auto source profile

Similar with NSO, add “source” command to “.bash_profile” that in MacOS. That will let you direct to login to WAE but not do “source wae711/waerc”, as follow:

[root@frank ~]# echo "source /opt/wae711/waerc" >> .bash_profile
[root@frank ~]# more .bash_profile | grep wae
source /opt/wae711/waerc

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MacOS Tips

开启三指拖拽

System Preferences -> Accessibility -> Mouse & Trackpad -> Trackpad Options -> Enable dragging -> three finger drag

改变分辨率

默认分辨率是1680×1050, 看着不舒服,改成1440×900就可以了
System Preferences -> Displays -> Scaled ->

鼠标触控激活屏保

System Preferences -> Desktop & Screen Saver -> Hot corners -> choose one corner and choose “Start Screen Saver”

解决windows10在fusion中分辨率的问题

  • 在fusion的setting中启动Retina 显示,并开启自动调整
  • 在win10中安装Vmware tools
  • 在win10的Display中,选择高级scaling setting,打开“let windows try to fix apps ……”

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在MacOS中部署Python虚拟开发环境

部署虚拟开发环境

虽然自己不是软件工程师,但有时候为了测试会写一些小程序,所以常常需要在自己电脑上设置开发环境。由于MacOS原生支持Python,所以我们可以不用那么麻烦的设置开发环境。但为了系统的稳定性,还是不要随便增加或变更自带的python,所以开发环境直接用虚拟环境就可以了,大概构架如下:


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CISCO WAE: wae-db dead but pid file exists

Introduction

If you found similar alarms, you can follow the guide and try to workaround the issue.

Problem

My customer found WAE REST API not workable, after checked, found wae-db have issue and report alarm, as follow.
And try to restart the WAE service and reload VM, not any useful.

[root@wae-auto wae-db]# service --status-all | grep wae
JAVA_EXECUTABLE or HSQLDB_JAR_PATH in '/etc/sysconfig/hsqldb' is set to a non-file.
wae-appenginecore is running OK, with PID=18606
wae-core is running OK, with PID=18163
wae-db dead but pid file exists  <<<<<<
wae-designapiserver is running OK, with PID=18847
wae-messaging is running OK, with PID=17874
wae-ni is running OK, with PID=17525
wae-osc is running OK, with PID=18369
wae-svcs-dashui is running OK, with PID=16652
wae-svcs-db is running OK, with PID=16277
wae-svcs-localrepo is not running
wae-svcs-log is running OK, with PID=16497
wae-svcs-logagent is running OK, with PID=16570
wae-svcs-metricsbkr is running OK, with PID=16716
wae-svcs-metricsd is running OK, with PID=16806
wae-svcs-mon is running OK, with PID=16138
wae-svcs-ui is running OK, with PID=16917
wae-system-server is running OK, with PID=16186
wae-web-server is running OK, with PID=17761

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