The Journey of a Network Engineer:

network


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...

August 1, 2012  1:43 AM

New Datacenter Network Design Proposal



Posted by: Sulaiman Syed
6509, application, CCDP, Cisco, datacenter, design, detail, network, SUP720

I have mentioned the DC design that was at hand, A new network design was proposed to tackle the issues. Figure below shows the proposed design. The benefits of such design are:


July 30, 2012  5:08 PM

New Datacenter Network Design



Posted by: Sulaiman Syed
application, Catalyst, CCDP, Cisco, datacenter, design, IPv4, network

I've came upon a network design for data center. While the physical infrastructure consisted of the latest technology,  it had "flaws" in the technical side of  it. The figure blew shows the connectivity.  


July 29, 2012  1:44 AM

How to Interconnect OSPF areas? – part 2



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

In my previous entry, I have mentioned the methods that can be used to interconnect different areas in OSPF. In this entry, I would post another similar network...


July 28, 2012  1:26 AM

How to Interconnect OSPF areas? – part 1



Posted by: Sulaiman Syed
CCIE, Cisco, Configure, network, OSFP, protocol, route, router, routing

While studying for CCIE, i realized that no scenario will be without connecting different OSPF areas. So, what are the rules when having multiple areas in OSPF to have a fully converged network with full route propagation? The rule is one

Every Area is OSPF should be connected to...


July 24, 2012  1:59 AM

INE refresh their troubleshoot for CCIE R&S



Posted by: Sulaiman Syed
CCIE, Cisco, INE, Lab, network, routing

Couple of months ago, Brian mentioned in his blog "INE R&S CCIE Product and Rack Updates – May 2012" the new troubleshoot rack, scenario. Yes, this will go inline with the 2 hour sections that in real...


January 1, 2012  8:05 AM

Moving from Explicit Proxy to Transparent Proxy – part 3



Posted by: Sulaiman Syed
6500, BlueCoat, Cisco, design, network, packeteer, packetshaper, paloalto, proxy, transparent

While we had overall idea of the design direction, we have identified other points that were integrated into the final design. The diagram below shows the almost finalized design.


December 27, 2011  1:11 AM

Moving from Explicit Proxy to Transparent Proxy – part 2



Posted by: Sulaiman Syed
Cisco, design, explicit, Firewall, network, PBR, proxy, router, switch, transparent

If you have read the first part of this series, you would know that there is major upgrade plan move from explicit proxy...


October 19, 2011  3:27 AM

How to configure Lock-and-Key (dynamic ACL)?



Posted by: Sulaiman Syed
?, ACL, Cisco, Configure, dynamic, how, Lock-and-key, network, router, to

Dynamic ACL are very interesting. They provide temporary access at certain times for certain users. Basically, the user will telnet to the router. If the authentication passes, then router permits that IP to to access the internal parts of the network. First, we need to create access-list,...


October 12, 2011  12:31 AM

How to Insure End to end connectivity in Frame-Relay



Posted by: Sulaiman Syed
active, CCIE, Cisco, Configure, end-to-end, how, ios, keepalive, network, PVC, router, to, VC

This is one of the nice features that i just discovered yesterday. It is the ability to make sure an end-to-end frame-relay connectivity between Cisco routers. In the local router, we can see the PVC status.
Rack1R3#show frame-relay pvc PVC Statistics for interface...


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