The Journey of a Network Engineer:


September 10, 2013  4:15 AM

How to configure Cisco DMVPN? Part-3

Posted by: Sulaiman Syed
ASA, Cisco, configuration, DMVPN, GRE, HUB, ipsec, mGRE

We have seen how in the first part how DMVPN works, the dynamic tunnels and how we can peer Spokes to each other to allow direct traffic. But all will fail if our Hub goes down, as it is critical in keeping the DMVPN network up. For redundancy Dual Hub DMVPN networks were designed, we would look at...

August 27, 2013  6:05 AM

How to configure Cisco DMVPN? Part-2

Posted by: Sulaiman Syed
Cisco, Configure, DMVPN, route, router, routing

In the previous entry, we saw how to configure a basic DMVPN network. Let's see the effect of adding the extra multicast mapping on our network table, and EIGRP adjuncies.

August 18, 2013  12:15 AM

How to configure Cisco DMVPN? Part-1

Posted by: Sulaiman Syed
ARP, Cisco, Configure, DMVPN, how, mGRE, route, Tunnel, vpn

Configuring Site-to-Site VPN although straight forward, but it fails to scale. just imagine how many tunnels should be created to connected to 10 sites, specially if...

August 7, 2013  12:19 AM

Configuring Cisco GRE over Site to site VPN

Posted by: Sulaiman Syed
access-list, Cisco, end-to-end, GRE, ios, ipsec, route-map, router, vpn

Previously we have seen how the site to site VPN works. in this example, I would use the topology below to configure Site to Site VPN. Then we would create a GRE Tunnel and secure it with the IPsec tunnel, called GRE over IPSec. thus providing routing protocols the ability to transverse the sites...

July 22, 2013  11:17 PM

How Cisco Site-to-Site IPsec VPN Works?

Posted by: Sulaiman Syed
Cisco, Firewall, vpn

Branch connectivity to the HQ or the Datacenter is one of the essential topics that almost all businesses have to deal with. Various methods has been developed to connect Branches. All these methods fall under the WAN connectivity module. Wan connectivity can be achieved using:

February 26, 2013  6:03 AM

Setting up CUCM in VMware workstation – part 2

Posted by: Sulaiman Syed
Cisco, CUCM, GNS3, router, Unity, VMware, voice

In part one we seen how to configure GNS3, to integrate the router with the virtual environment that we would be running in VMware. Next, would be the creation of VMware...

February 25, 2013  2:38 AM

Setting up CUCM in VMware workstation – part 1

Posted by: Sulaiman Syed
Cisco, CUCM, DNS, GNS3, ios, NTP, router, VMware, voice

Although setting up Cisco Unified Communication Manager (CUCM) in VMware is pretty easy and straight forward, I had to struggle to get it up and running. Partially cause i was creating the VM wrongly. In this series, I...

February 20, 2013  5:30 AM

How to configure On-Demand Routing in Cisco routers?

Posted by: Sulaiman Syed
Cisco, network, ODR, OSFP, route, router

On-Demand Routing (ODR) is one of the few simple routing methods. It is not a protocol by itself as it uses Cisco Discovery Protocol (CDP) to gather and propagate the route information. ODR is designed for Hub-spoke networks, where the spokes are stub networks with nothing connecting them. As...

February 16, 2013  2:17 AM

How to configure VSS?

Posted by: Sulaiman Syed
6500, 6509, Cisco, cost, datacenter, design, Firewall, FWSM, server farm, VSS

Virtual Switching System (VSS) was one of the early technologies that introduced in the datacenter world to eliminate spanning tree protocol (STP). Thus, giving networks and servers multiple active links with non-blocking ports architecture. The configurations are quite simple and straight...

February 11, 2013  7:05 AM

The highlight of Cisco Connect 2013 Saudi Arabia

Posted by: Sulaiman Syed
3850, access, AP, BYOD, Catalyst, Cisco, infrastructure, switches, WiFI, wireless

I had the opportunity to attend Cisco Connect 2013, It was a two day conference at the Four Seasons Hotel in Riyadh, with multiple sessions of talks, presentations, and technology demonstrations. Event...

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