The Interaction of IGP Weight Optimization with BGP

Traffic Engineering an Operational Network with the TOTEM Toolbox

“…If the deployment of an MPLS solution is not possible, we recommend SPFInvCap with ECMP or IGP-WO. If IGP-WO is chosen, it is very important to verify that it does not result in the worst case scenario of figure 3 or better, use the technique proposed in [12]. These recommendations are of course only valid for this network.…”

“…For each of the 113 Traffic Matrices we have run IGP-WO and generated a new Resulting Traffic Matrix. Note that the Hot Potato effects in IGP-WO are considered in more detail in [12].…”

Intra-domain traffic engineering with shortest path routing protocols

“…In a very recent work, Cerav-Erbas et al (2006), possible interaction of Border Gateway Protocol (BGP) with IGP decisions is studied. The interaction of BGP with IGP has been previously investigated in .…”

“…Hot-potato routing refers to the fact that, in case of several different paths available after the BGP decision process, the favor will be given to the shortest one, such that packets leave an AS as soon as possible. Cerav-Erbas et al (2006) show that hot-potato routing can cause significant changes in BGP updates, and propose a traffic engineering (TE) approach based on the robust optimization of the link weights against multiple traffic matrices to smoothen the negative effect of hot-potato routing. In the experiments, it is stated that the robust TE process is especially more effective when the network resources are more strict.…”

BIGP- A New Single Protocol that can work as an IGP (Interior Gateway Protocol) as well as EGP (Exterior Gateway Protocol)

“…RIP was first popularly used IP distance vector protocol, with the cisco-proprietary Interior Gateway Routing Protocol (IGRP) being introduced a little later. But because of their slow convergence and other problems Link-state protocols-in particular, OSPF and integrated IS-ISsolved the main issue with distance vector protocols [3,6]. Around same time as the introduction of OSPF, cisco created a proprietary routing protocol called Enhanced Interior Gateway Routing Protocol (IGRP).…”