The Journey of a Network Engineer:


February 13, 2012  10:33 AM

How to configure VRF-lite?

Posted by: Sulaiman Syed
CCIE, Cisco, Configure, forwarding, how, routing, to, virtual

VRF-lite is as the name says, light version of VRF. What is VRF? It is Virtual Routing and Forwarding. It is a logical way of segregating network traffic. Mostly used with

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December 14, 2011  12:26 AM

How to configure per-vlan QoS in Cisco 3550 and 3560

Posted by: Sulaiman Syed
3550, 3560, CCIE, Cisco, class-map, Configure, how, Lab, mark, nested policy, parent policy, per-vlan, police, policy-map, QoS, rate, switch, to, vlan

You might think that configuring QoS in Cisco Switches will follow the same syntax. That what I thought till i started studying CCIE. Let's See one major difference in how policing is implemented on these two platforms. Cisco Catalyst 3550 I find the configuration of 3550...

December 9, 2011  1:33 AM

How to traffic shape Frame-Relay? – part 2

Posted by: Sulaiman Syed
?, adaptive, CCIE, data, how, legacy, map-class, mqc, QoS, shaping, to, traffic, voice

In How to traffic shape frame-relay? part 1 , i have mentioned four types of QoS mechanism that can be applied to frame-relay interface. Lets have a look at the other two...

November 23, 2011  10:02 AM

How to configure route dampening in BGP

Posted by: Sulaiman Syed
CCIE, dampening, flap, half-life, how, map, route, router, to

Flapping routes are bad news in BGP. flapping routes are the routes that go up and down in very short time. they are bad news cause they require changes in routing table. routing table that consists of 100 thousand routes cause high load on router. a flapping route will: 1- change the table by...

November 20, 2011  3:11 AM

How to configure Path Variables for BGP aggregation route?

Posted by: Sulaiman Syed
Aggregation, Attribute, CCIE, Cisco, how, Path, route-map, router, to, variables

Using route aggregation (summary) is one of the important tools with BGP. it provides a strong foundation to keep the routes from flapping, or making rapid changes within the BGP backbone cloud. but what if we want to advertise the aggregation with different AS Path variables? as it is known BGP...

November 10, 2011  7:35 PM

How to add reliable default route with RIP?

Posted by: Sulaiman Syed
CCIE, Cisco, how, monitor, reliable, RIP, route, router, static, to, track

Adding reliable default route with RIP The command for distributing a default route into RIP process is very straight forward.  Lets go with the syntax straight away.

router rip default-information originate route-map RELIABLE ! route-map...

November 7, 2011  4:35 AM

How to filter routes in RIP?

Posted by: Sulaiman Syed
CCIE, Cisco, distribute-list, how, loop, prefix-list, RIP, route, router, to

Filtering routes in RIP Although rip is not the best routing protocols, the mechanism of filtering routes can be applied to other routing protocols a well. My personal advice will be to stay away as much as possible from RIP. RIP is a routing loop magnet, you never know when you...

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 17, 2011  12:32 AM

Loopback address and MPLS-VPN!

Posted by: Sulaiman Syed
Configure, EIGRP, GNS3, how, ios, MPLS, RIP, router, switch, to, vpn

In this article, i will not go deeply into the issue of configuring MPLS-VPN. The steps were mentioned very clearly in an earlier post. MPLS-VPN Tutorial...

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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