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EVPN Summary

EVPN

L2VPN中,我们常见的是VPLS,EoMPLS,AoTM等,这些技术主要利用伪线技术(Kompella/Martini)构造虚拟专网或专线,并由MPLS承载。虽然已经可以通过BGP自动发现并创建伪线,但基于伪线技术的L2VPN有很多缺陷,所以需要一个技术可以通过BGP来替代原来的伪线技术,因此才有了EVPN,EVPN带来最大的不同就是通过BGP控制平面来进行MAC学习,而不是数据平面。2015年提出的PBB-EVPN也是属于EVPN的一种。

EVPN带着替换伪线技术的使命而来,同之前一样,主要涉及点到点、点到多点,下图包含了我们常见的几种EVPN(我暂时没有把ETREE列出来),此篇文章主要以几类Route Type为例,展开整理EVPN的内容,以备以后复习

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How to deploy xrv9k in vCenter if you have only qcow2 image?

At some times, we only have a qcow2 image, but ESXI(vCenter) only supports vmdk, how to do deploy? In the video guide, I will show how to convert img to vmdk from qcow2, then deploy by import exist hardware(vmdk).

Btw, xrv9k supports only 3 virtual interfaces: e1000, virtio, and VMXnet3. Please notices not support e1000e!

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NSO For NFVO – 01

VNF

VNF(Virtual Network Function):是NFV(Network Function Virtualization)的一个组件,通过VNF,可以屏蔽硬件需求;可以通过VMs使用VNFs部署各种功能

VNFD(VNF Descriptor):描述VNF,在其中VDU(Virtual Decice Unit)将会被定义,等同于单个的VM;简单的VNFD会包含单个VDU,复杂的VNFD会包含多个VDUs;VDU包含vCPU,memory,storage,image,flavor,NIC ID mapping和NED type等;NVFD在ETSI SOL001(YAML)和SOL006(Yang)标准中定义

VNF-info:真实网络连接信息,租户信息,凭据,启动和恢复时间,day0配置,ESC设备名称等

下面是上面几种信息的关系:

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TigerVNC on ubuntu 20.0

Install Desktop Gnome

root@server-test:/opt# apt-get install -y ubuntu-desktop

Install/Config TigerVNC

root@server-test:/opt# apt -y install tigervnc-standalone-server
......
root@server-test:/opt# vncpasswd
Password:
Verify:
Would you like to enter a view-only password (y/n)? n
root@server-test:~# more /root/.vnc/xstartup
# create new (or add to the end)
exec /usr/bin/gnome-session &
# start with diplay number [1], screen resolution [800x600]
root@server-test:~# 
root@server-test:~# vncserver :1 -geometry 800x600 -localhost no

New 'gcsprendpoint-yonzhao2test-share-flat2-ni9ngm-server-ne.novalocal:1 (root)' desktop at :1 on machine gcsprendpoint-yonzhao2test-share-flat2-ni9ngm-server-ne.novalocal

Starting applications specified in /root/.vnc/xstartup
Log file is /root/.vnc/gcsprendpoint-yonzhao2test-share-flat2-ni9ngm-server-ne.novalocal:1.log

Use xtigervncviewer -SecurityTypes VncAuth,TLSVnc -passwd /root/.vnc/passwd gcsprendpoint-yonzhao2test-share-flat2-ni9ngm-server-ne.novalocal:1 to connect to the VNC server.

Access by TigerVNC Client

Other

2020-07-24 Update: Change to TightVNC

I found an issue that cannot input anything when login via tigerVNC, normal user is ok after disable screen auto clock, but root couldn’t login in. So I transfer to TightVNC that work perfect now. Follow install guide:

How to Install and Configure VNC on Ubuntu 20.04

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Two issues for IxNetwork when set eBGP by Scenario

Ixia updates NexGen framework in IxNetwork, that is great function and help tester simplified workload, but looks like the function couldn’t completely automate,  e.g when you config local address, GW address couldn’t auto-generate, you must manually change that, that should ok, everybody should fix that~ 🙂  But some issue will waste your time to troubleshooting. Summary two issues for the article that will help you fast to fix similar issues.

My IxNetwork version is 7.40.929.28.GA, GA version, wish to fix those issues at MR version 🙂

MALFORM update error on NCS5500

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