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 OpenStack A software build by open-source community to manage private cloud datacenters. OpenStack is a CMS (Cloud management System). yum update -y yum insall vim net-tools yum install vim net-tools netstat -tulpn yum install -y https://rdoproject.org/repos/rdo-release.rpm yum groupinstall 'Development Tools' egrep --color 'vmx|svm' /proc/cpuinfo | wc -l sed -i s/'SELINUX=enforcing'/'SELINUX=disabled'/g /etc/selinux/config cat /etc/selinux/config | grep SELINUX= yum install -y centos-release-openstack-train systemctl disable firewalld systemctl stop firewalld systemctl disable NetworkManager systemctl stop NetworkManager systemctl enable network yum install -y openstack-packstack yum -y downgrade leatherman yum list | grep leatherman yum install -y tmux ---------------------------------------- Only on Controller: packstack --gen-answer-file=/root/answer.txt vim answer.txt CONFIG_iPROVISION_DEMO=n CONFIG_KEYSTONE_ADMIN_PW= (Your Password for admin) ...

 COMWARE Switches 5.2 NTP issue While troubleshooting I have found: The packet is sent from the client to the server and we are receiving a response as well. As per the last message in the debug at the switch, the information is dropped as the stratum is not less than 15. A device can act as a server to synchronize other devices only after it is synchronized. If a server has a stratum level higher than or equal to a client, the client will not synchronize to that server On Comware v5 switches 5120 SI/ EI, you do not have the option to change the stratum level on the switch which is supposed to act as a server Connect a 5130 switch or any higher-end switch to act as an NTP server that supports the below commands. [5130]ntp-service enable [5130]ntp-refclock-master 2 These commands are used to set the stratum on the switch where 2 is the integer for the stratum. Once set, the NTP will be synchronized and you would be able to successfully load the time settings. 

 ArubaOS-Switch 16.05 NTP issue Often we found, the ArubaOS having issues with NTP time syncing. I have found the solution to tackle this issue. timesync sntp sntp unicast sntp 30 sntp server priority 1 SERVER X.X.X.X (NTP SERVER IP) time timezone 330 ( 330 for IST) Happy Learning :) Thanks, Naresh Mahato.

  910 office connect _cmdline-mode on 512900   920 office connect _cmdline-mode on Jinhua1920unauthorized

The command line comparison demonstrated for 4 different OS of the switches, I think this will help you to understand the configuration level deployment. Comware Differences If you are familiar with either the ArubaOS-Switch CLI or the Cisco IOS CLI, you will notice that the  Comware CLI is organized slightly differently . Comware was designed for Internet service providers (ISPs). Many features and functions—such as security and Quality of Service (QoS)—are multi-tiered to  support the different needs of multiple entities accessing the same switch. ArubaOS-CX ArubaOS switch (now the Aruba OS), HPE Comware version 7 Cisco IOS ArubaOS-CX operating system runs on the 8400 and 8320 switches. ArubaOS Switch operating system runs on Aruba 2530 , Aruba 2920 , Aruba 2930F , Aruba 2930M , Aruba 3810M , Aruba 5400R , HPE 2620 , HPE 3500 , HPE 5400 and HPE 3800 switch platforms. HPE Comware7 operating system runs on HPE FF 12900 , HPE 12500 , HPE 5120/5...

Site to Site VPN for Beginners. The two sites are able to access the internet and having static Public IP. the equation is the sites need to access each other resources securely over the web. A small example is as below: Router 1: Router1#sh running-config Building configuration... Current configuration : 1303 bytes ! version 12.4 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname Router1 ! ! ! ! ! ! ! ! ip cef no ipv6 cef ! ! ! ! crypto isakmp policy 1 encr aes authentication pre-share group 5 lifetime 1800 ! crypto isakmp key nightread3r address 122.1.1.2 ! ! crypto ipsec security-association lifetime seconds 1800 ! crypto ipsec transform-set t-set esp-aes esp-sha-hmac ! crypto map test 10 ipsec-isakmp set peer 122.1.1.2 set security-association lifetime seconds 1800 set transform-set t-set match address 101 ! ! ! ! ! ! spanning-t...

Hi all !! Today I am going to show you how to trace TCP packet for our destination. Often we see that we are allowed to browse the site only, and we are not able to trace the destination. In this scenario, we always stuck to check the destination path. first, we have to understand the communication process, Often we see the TCP segment flow the source and destination IP, Source IP having random port and destination IP having the well-known port. Let's start the Technique to troubleshoot the TCP Communication. 1>  We have to install  WinPcap 2> tracetcp.exe to the current working directory of the cmd. like: I have installed in C:\Users\Naresh>tracetcp.exe I have given the link where we can download the necessary tools. https://www.winpcap.org/install/bin/WinPcap_4_1_3.exe https://drive.google.com/file/d/1rLpAQDF3W5twnw0Llpa4G_4Sdbk1QQSF/view?usp=sharing Now you can run the command like this: I...