Networking Tips Tricks

Network diagram Figure 1-2  Network diagram for LLDP compatible with CDP configuration Network requirements l            GigabitEthernet 2/0/1 and GigabitEthernet 2/0/2 of Switch A are each connected to a Cisco IP phone. l            Configure voice VLAN 2 on Switch A. Enable CDP compatibility of LLDP on Switch A to allow the Cisco IP phones to automatically configure the voice VLAN, thus confining their voice traffic within the voice VLAN to be isolated from other types of traffic.

LLDP The Link Layer Discovery Protocol (LLDP) operates on the data link layer. It stores and maintains information about the local device and the devices directly connected to it for network administrators to manage networks through NMS (network management systems). In LLDP, device information is encapsulated in LLDPDUs in the form of TLV (meaning type, length, and value) triplets and is exchanged between directly connected devices. Information in LLDPDUs received is stored in standard MIB (management information base). Configuring LLDP Network Diagram Figure 1-1  Network diagram for LLDP configuration Networking and Configuration Requirements l            As shown in  Figure 1-1 , connect NMS to Switch A over the Ethernet; and connect Switch A to the MED device and Switch B through GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 respectively. l            Configure LLDP on th...

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Fix for Firefox & IE Address Bar to Prevent OpenDNS From Redirecting Google Search pages Like everyone else, I search the web from the browser address bar and have set Google as the default search engine in both Firefox and IE. I also use OpenDNS for DNS Sounds like a perfect combination but a side effect of using OpenDNS is that you can no longer search Google from Firefox location bar or the address bar of Internet Explorer.

  We  love OpenDNS  but for one annoying feature where OpenDNS automatically redirects typos and invalid URLs to their own ad-filled search pages as in this screenshot. Let me explain - if you type a non-existent web domain in your web browser (e.g. gmail.coms instead of gmail.com), you'll land up on OpenDNS search page and won't see the default "Address Not Found" error in your browser.