network, cisco, firewall, routers, call manager, switches, rspan, configure, root Networking - Page 3 - Tech-Recipes

Networking tutorials

Updates for IP Telephony (Cisco CallManager, CallManager Express)

contributed by Al Banks on November 17, 2006 under Cisco call manager

A couple of new commands to make life easier with IP Telephony using Cisco CallManager and CallManager Express.

Cisco switch: 802.1q trunk to router, aka router-on-a-stick

contributed by Al Banks on under Cisco switch

Connect a Cisco switch and router via 802.1q trunking. This configuration is known as a router-on-a-stick.

Optimize Cisco CallManager – Use IP address, not servername

contributed by Al Banks on November 6, 2006 under Cisco call manager

In system>server, the default name for each server is it’s hostname. These names will be passed along to the phones, requiring a DNS lookup before a phone can contact CallManager.

Configuring DHCP to work with Cisco Manager

contributed by kel on November 3, 2006 under Cisco call manager

This Tech-Recipe describes using an external DHCP server, in this case from a Windows Server 2000 or 2003 system, with Cisco Call Manager (CCM). When introducing CCM into environments with an exsiting DHCP infrastructure, problems may occur because Cisco IP phones require additional information from the DHCP server when they startup. Following the steps in this Tech-Recipe will allow the use of a non-CCM DHCP server.

Cisco: Making long commands short with aliases

contributed by AWfki on October 11, 2006 under Cisco networking

How to configure aliases for frequently used commands.

Disable or turn off CDP on Cisco switches

contributed by CISSP06 on August 12, 2006 under Cisco switch

Cisco Discover Protocol or CDP is a Cisco-proprietary protocol that runs on all Cisco products. CDP allows devices to learn about neighboring devices (the ones attached directly to the switch) including information about their platform, IP address, the version of IOS or other OS, VLAN membership, etc. This can be helpful information when troubleshooting network issues, it can also provide an attacker valuable information about the layout of your network. Other vulnerabilities include a denial of service attack in which CDP packets are generated, flooding the network. If you want to know how to turn off CDP, read on.

Cisco 2950 Switch: Create a VLAN

contributed by CISSP06 on July 28, 2006 under Cisco switch

The commands for creating a VLAN vary from one switch model to another. VLANs in a 2950 switch are configured in a manner similar to configuring an interface. This configuration is substantially different than a 2900 switch.

Cisco 2900 Switch: Create a VLAN

contributed by CISSP06 on under Cisco switch

A VLAN (Virtual Local Area Network) makes a single physical switch behave like several separate switches. A host connected to one VLAN cannot communicate through the switch to a host connected to another (although a router can permit communication between VLANs if desired). Here’s how to configure a new VLAN on a 2900 switch.

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