Analyzing Impact of Segment Routing MPLS on QoS
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Date
2019-12
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
Multiprotocol Label Switching ( MPLS) Segment Routing (SR), SR-MPLS in short, is an
MPLS data plane-based source routing paradigm in which a sender of a packet is allowed to
partially or completely specify the route the packet takes through the network by imposing
stacked MPLS labels to the packet. SR-MPLS could be leveraged to realize a unified source
routing mechanism across MPLS, IPv4 and IPv6 data planes by using an MPLS label stack as
unified source routing instruction set while preserving backward compatibility with traditional
MPLS networks.
The Segment Routing is a promising Traffic Engineering (TE) model that provides end-to-end
communications. SR can observably improve the network utilization and control the routing
path flexibly by encoding route information into a list of segments, i.e., the Segment List (SL).
The key feature of SR is that it adopts the source routing paradigm, which implies the routing
path followed by a packet is determined and written to the packet header by the first switch of
SR networks (called Ingress SR switch).
The motivation of this thesis is to investigate and analyze the impact of implementing SRMPLS
on
Quality
of
Service
(QoS).
The
impact
on
QoS
parameters
is
analyzed
by
using
two
scenarios;
Traditional
Unified
MPLS
integrating
four
domains
into
single
MPLS
domain
and
Segment
Routing
over
Unified
MPLS
integrating
four
domains
into
a
single
MPLS
domain.
Simulation
tools
such
as
EVE-NG,
Ostinato,
Cisco
IPSLA technology are used to compare
performances of the two scenarios. The analysis results show that in SR-MPLS throughput is
improved on average by 32%, latency is improved by 24%, packet loss is improved by 20.4%
and jitter is improved by 12.6% compared to Label Distribution Protocol (LDP) based Unified
MPLS. From the results, one can understand that any service provider can benefit from
deploying Unified SR-MPLS. Segment Routing is a new routing paradigm that provide a better
end-to-end QoS guarantee, making traditional MPLS network more efficient and scalable.
Description
Keywords
IP, MPLS, Segment Routing, QoS, SR-MPLS domain, Latency, Jitter, Throughput, Packet loss, Performance