Archive for the ‘Network’ Category

  • How to Install Munin on CentOS

    Friday, June 18th, 2010

    Introduction:- Munin is a highly flexible and powerfull solution used to create graphs of virtually everything imaginable throughout your network, while still maintining a rattling easy of installation and configuration. Munin is a networked resource monitoring tool that can help analyze resource trends and “what just happened to kill our performance?” problems. It is designed [...]

  • Network Load Balancing, Bonding /Teaming of Two NIC cards

    Friday, April 16th, 2010

    Step #1: Create a bond0 configuration file First,creating bond0 config file: # vi /etc/sysconfig/network-scripts/ifcfg-bond0 DEVICE=bond0 IPADDR=192.168.1.20 NETWORK=192.168.1.0 NETMASK=255.255.255.0 USERCTL=no BOOTPROTO=none ONBOOT=yes Replace above IP address with your actual IP address. Step #2: Modify eth0 and eth1 config files: # vi /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 USERCTL=no ONBOOT=yes MASTER=bond0 SLAVE=yes BOOTPROTO=none # vi /etc/sysconfig/network-scripts/ifcfg-eth1 DEVICE=eth1 USERCTL=no ONBOOT=yes MASTER=bond0 SLAVE=yes [...]

  • Enabling SNMP Traps and Informs

    Sunday, April 11th, 2010

    Problem You want the router to generate SNMP traps or informs in response to various network events. Solution The following configuration commands will enable your router to send unsolicited SNMP traps to a network management server: Router#configure terminal Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#snmp-server enable traps Router(config)#snmp-server host 172.25.1.1 ORATRAP config [...]

  • Proposed IT subnetting Infrastructure

    Sunday, January 24th, 2010

    Proposed IT subnetting Infrastructure  For External communication we will use Cisco Router(Cisco ASA5520 firewall) For internal communication we will use managed switch Dell Power Connect 6248 Why use a Managed Switch? Limit broadcast traffic and increase security using VLANs Remove traffic bottlenecks using port trunking Guarantee bandwidth for time-sensitive voice and video traffic using Traffic [...]

  • Boost Network Performance / Throughput

    Sunday, January 24th, 2010

    Network Performance Document Linux Configure Jumbo Frames to Boost Network Performance / Throughput Most modern Linux distros (read as Linux Kernel 2.6.17+) does support frames larger than 1500 bytes. This can improve the performance. First, make sure your network driver supports custom MTU. Second you need to have a compatible gigabit NIC Jumbo frames can [...]

  • Small to Medium-Sized Network Using Catalyst 3560 Switches

    Sunday, January 17th, 2010

    Figure 1-1 shows a configuration for a network of up to 500 employees. This network uses Catalyst 3560 Layer 3 switches with high-speed connections to two routers. For network reliability and load balancing, this network has HSRP enabled on the routers and on the switches. This ensures connectivity to the Internet, WAN, and mission-critical network [...]

  • Network Performance Document

    Saturday, October 31st, 2009

    Network Performance Linux Configure Jumbo Frames to Boost Network Performance / Throughput Most modern Linux distros (read as Linux Kernel 2.6.17+) does support frames larger than 1500 bytes. This can improve the performance. First, make sure your network driver supports custom MTU. Second you need to have a compatible gigabit NIC Jumbo frames can reduce [...]