Category Archives: Cisco- R&S

LAB: Multicast PIM Dense-Spare Mode

Multicast, one of the most interesting topics and for me one of the most challenging topics In this lab, I am going to use PIM with Dense & Spare mode to achieve successful join for the multicast ip 239.5.5.5 The … Continue reading

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Layer 3 QoS – ToS

We have to keep in mind that QoS, helps the network passing “important” traffic once a congestion happen; it doesn’t prevent the network from being loaded it just try to survive the situation with minimum interruption for the traffic that matters … Continue reading

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PT LAB: Bringing up Nours small network – Layer 3 High Availability (HSRP)

I want to make some adjustments to my network so I can add Layer 3 high availability. The changes I am having, separate DHCP servers, instead of using layer 3 router. Set the GW for router 1 to 192.168.VLAN.2  (Router … Continue reading

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PT LAB: Bringing up Nours small network – Protecting STP

Root Guard In my network, I have core switch 2 as the primary root and core switch 1 as secondary root. I want to prevent another switch from advertising itself as a root, to achieve this I will add the root guard to … Continue reading

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PT LAB: Bringing up Nours small network – STP portfast & RSTP

This is how my small network looks so far:  https://me2learn.wordpress.com/2014/09/28/pt-lab-bringing-up-nours-small-network/ Spanning tree protocol has some cool feature for fast convergence, in this post I wish to configure and test them. 1- Port fast (Edge of the network) access_1(config)#int range fa … Continue reading

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