How to assign IP address manually vCenter Appliance

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How to assign IP address manually vCenter Appliance Login to vCenter Appliance Login as: root Default password is: vmware Execute the following command: /opt/vmware/share/vami/vami_config_net After executing the command, a menu is displayed. Within the menu It is possible to change the IP address, hostname, DNS, Default gateway and proxy server.           … Read more

How to configure cisco router as NTP server

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How to configure Cisco router as NTP server 1- you have to obtain public NTP server addresses from www.ntp.org 2-  configure you router with NTP server IP GK_RTR#configure terminal GK_RTR(config)#ntp server 64.209.210.20 GK_RTR(config)#ntp source lo GK_RTR(config)# ntp master GK_RTR(config)#clock timezone ARIZONA -7 3- Verifying NTP Configurations GK_RTR#show ntp associations GK_RTR#show clock 4- After you configure … Read more

Cisco Router as DHCP Server

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Cisco Router as DHCP Server Using a Cisco router as a DHCP server is a somewhat common practice in smaller networks.In this example we have two VLANs one for Voice and one for DATA. DATA VLAN  IP  Nework Range  172.16.1.0  Gateway IP 172.16.1.1  DNS Server  10.31.144.1 Voice VLAN  IP  Nework Range  172.16.2.0  Gateway IP 172.16.2.1 … Read more

How to calculate PVDM requirement for Cisco IP Telephony

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How to calculate PVDM requirement for Cisco IP Telephony DSP (Digital Signal Processors) is a chip that performs all the sampling, encoding, and compression functions on audio coming into your router .DSPs typically come in chips to install in your Cisco router that look like old memory  SIMMs. Cisco bundles these DSP chips into Packet Voice … Read more

How to configure T1/E1 controller on Cisco 2800 router

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How to configure T1/E1 controller on Cisco 2800 router

1- check physical location of card slot  to check run command

# sh diag

it will show you WIC slot no

WIC Slot 0:
VWIC2-1MFT-T1/E1 – 1-Port RJ-48 Multiflex Trunk – T1/E1
Hardware Revision : 0.0

2- initialize the E1 T1 controller card

PSTN(config)#card type ?
e1 E1
t1 T1

PSTN(config)#card type e1 ?
<0-2> Card slot number (always 0 for 1800 series & 2801 routers)

PSTN(config)#card type e1 ?
<0-2> Card slot number (always 0 for 1800 series & 2801 routers)

PSTN(config)#card type e1 0 ?
<0-3> WIC slot number (0:WIC, 1:Onboard for NM-HDV2)

PSTN(config)#card type e1 0 0 ?
<cr>

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ISDN T1 E1 Troubleshooting TEI_ASSIGNED

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ISDN  T1 E1 Troubleshooting TEI_ASSIGNED ISDN Status as TEI_ASSIGNED meaning Which indicates that the PRI does not exchange Layer 2 frames with the Telco switch. Use the show controller e1 x command to first check the controller t1 circuit, and verify whether it is error free before troubleshooting ISDN Layer 2 problem with the debug … Read more

Remote Host Identification Has Changed error and solution

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Remote Host Identification Has Changed error and solution When we run scp command  to copy data to remote host its gives us error @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Solution is $ ssh-keygen -R {server.name.com} $ ssh-keygen -R {ssh.server.ip.address} $ ssh-keygen -R … Read more

VOS3000 Hacking prevention and protection

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VOS3000 Hacking prevention and protection VOS3000 old versions are being hacked . its costing too much money through illegal calls . you can prevent it some level  by taking some precaution . 1-  Make your server SSH root password complicated 2- Make your server mysql password complicated 3- Make your vos3000 client Admin password complicated … Read more