To view information about a particular interface, use the show interface command. The show interface command provides the following list of important information: Interface State (e.g. UP, DOWN, LOOPED) Protocol addresses Bandwidth Reliability and Load Encapsulation type Packet Rates Error Rates Signaling Status (i.e. DCD,DSR,DTR,RTS,CTS) The following is an example of a “show interface serial0″ [...]
To configure a dialer interface as a secondary or dial backup, use the backup interface dialer command in interface configuration mode. To disable this feature, use the no form of this command. backup interface dialer number no backup interface dialer number Syntax Description number Dialer interface number to use as the backup interface. Command Default Disabled Command Modes [...]
To enable automatic detection of the encapsulation types operating over a point-to-point link to a specified serial or ISDN interface or dialer interface under Media Gateway Control Protocol (MGCP) network access server (NAS) packages, use the autodetect encapsulation command in interface configuration mode. To disable automatic dynamic detection of the encapsulation types on a link, use [...]
tcpdump [options] [expression] System administration command. Dump headers and packets of network traffic that match expression. The command continues to capture packets until it receives a SIGTERM or SIGINT signal (usually generated by typing the interrupt character control-C). When finished, it will generate a report on traffic captured, received, or dropped by the kernel. Expressions Create matching [...]
This article provides information about how to diagnose and test Transmission Control Protocol/Internet Protocol (TCP/IP) or NetBIOS network configurations. When you want to troubleshoot a TCP/IP networking problem, first check the TCP/IP configuration of the computer that is experiencing the problem. To View the TCP/IP Configuration by Using the Ipconfig.exe Tool Click Start, click Run, type cmd, and [...]
Red Hat is announce a new addition to its line of performance-based certifications — Red Hat Certified System Administrator (RHCSA). The new RHCSA credential aligns with the critical skills required of today’s system administrators. As with all of Red Hat certification exams, the RHCSA exam continues the practice of evaluating knowledge and skills through hands-on, lab-based [...]
To configure the Direct Server Return (DSR) feature on the NetScaler appliance, complete the following procedure from the command line interface of the appliance: Run the following command to enable the MBF (Mac Based Forwarding) mode: enable ns mode mbf Run the following command to create the service: add service <Service_Name> <IP_Address> ANY * -usip [...]
Unfortunately, the windows admins doesnot like to work on Linux box because of the GUI problems. Here comes webmin. Webmin is a web-based system configuration tool for Unix-like systems, although recent versions can also be installed and run on Windows. Here we are going to discuss about managing sendmail server via webmin. First you need to [...]
Oracle Database 10g Express Edition (Oracle Database XE) is an entry-level, small-footprint database based on the Oracle Database 10gRelease 2 code base that’s free to develop, deploy, and distribute; fast to download; and simple to administer. Oracle Database XE is a great starter database for: Developers working on PHP, Java, .NET, XML, and Open Source [...]
In Sun Solaris, we can use the Loopback File driver to mount an ISO image without having to write the ISO image onto a CD or DVD. Following procedure should help you mount an ISO image in Sun Solaris Attach a Block Device sunsolaris# lofiadm -a /export/software/iso_image.iso /dev/lofi/1 Mount the ISO Image block device sunsolaris# [...]
A router running Cisco IOS Release 12.0 or later does not select or use an iBGP route unless both of the following conditions are true: •The router has a route available to the next hop router: •The router has received synchronization via an IGP (unless IGP synchronization has been disabled). BGP bases its decision process [...]
The Interior Gateway Routing Protocol (IGRP) is a Cisco proprietary protocol. Like RIP, IGRP is a distance-vector interior routing protocol. However, unlike RIP, IGRP can be used in larger autonomous systems due to its large maximum hop-count limit of 255, compared to RIP’s maximum hop count of 16. IGRP uses bandwidth and delay of the [...]
Postfix allows you to listen on a particular IP address. By default MTA will list on all network interfaces and loopback. You need to setup inet_interfaces parameter. You need Postfix version 2.2 and later to use this feature. The parameter also controls delivery of mail to user@[ip.address] Postfix IP address bind configuration Open /etc/postfix/main.cf file: [...]
The Routing Information Protocol (RIP) is a dynamic routing protocol used in local and wide area networks. As such it is classified as an interior gateway protocol (IGP) using the distance-vector routing algorithm. It was first defined in RFC 1058 (1988). The protocol has since been extended several times, resulting in RIP Version 2 (RFC [...]
NFS Server The first thing I need to do is set up the NFS server module on the server machine. 1. Type sudo apt-get install nfs-kernel-server 2. Type sudo dpkg-reconfigure portmap and it asks whether I want to bind to loopback and I select no. It then informs me I need to restart the service. 3. Restart using sudo /etc/init.d/portmap restart and [...]