The Journey of a Network Engineer:

route-map

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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...

February 21, 2012  2:38 PM

How to use route-target?



Posted by: Sulaiman Syed
CCIE, Cisco, MPLS, route-map, router, vpn

The main purpose of route targets is to provide connectivity between different  MPLS-VPN  networks. For example, there are three enterprises namely A, B, and C. A and B are major networks with their own MPLS-VPN.  Enterprise A requires to access some servers and resources from Enterprise C. The...


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...


July 3, 2011  2:39 AM

How to manipulate BGP Routes



Posted by: Sulaiman Syed
Cisco, distribute-list, filter-list, Internet, PA, prefix-list, route, route-map, router

Border Gateway Protocol (BGP) is the back bone protocol that connects the internet. It falls under the External Gateway Protocols (EGP), interestingly it is the only routing protocols used in the external networks. BGP is a robust protocol that can handle 100k routes, which are increasing....


December 19, 2010  3:46 AM

How to manipulate BGP Routes – part 3



Posted by: Sulaiman Syed
access-list, Cisco, distribute-list, filter-list, manipulate, prefix-list, route, route-map, weight

This is the last part of BGP route manipulation. As discussed in the earlier entries, routes can be manipulated by

  • neighbor distribute-list (standard ACL / extended ACL)
  • neighbor prefix-list
  • neighbor...


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