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Introducing Standby Capabilities into Next7generation Network Devices

Raffaele Bolla DIST, University of Genoa

Italy [email protected]

Roberto Bruschi CNIT Italy

[email protected]

Antonio Cianfrani, Marco Listanti !niversity o, -o.e /Sa2ien3a4

Italy [email protected] [email protected]

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

Categories and Subject Descriptors H<I<J#KRoutersLB#M"1*857/;/*1#N),$1*'#

General Terms O1'&8"-#M641*&.1"$/$&)"-#P1/',*1.1"$-#Q1*9)*./"(1<#

Keywords#R*11"#"1$;)*:'-#N),$1*#Q);1*#P/"/81.1"$-#FG#N),$1*<#

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#Figure 1. State-of-the-art backbone network and device scenario in subfigure a), and, in subfigure b), the proposed approach to enable

network devices to selectively sleep their components. The approach is fully based on network re-configuration at L2, and aims at managing standby primitives in a transparent way with respect to the L3 overlay.

Router line-cards

L1 Links

L1 Topology

L2 Topology

L3 TopologyL2 Links

a) Network configuration as usual b) Green re-configuration

Standby mode activatedL2Ts/L3 interfacesSwitching matrix

Migrated L2 Virtualchannels and L2Ts

Standby mode activated

New paths for L2 virtual channels

Unchanged L3 overlay

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#Figure 2. Experimental testbed utilized to evaluate the

performance of the proposed approach. The DROP router is composed by 5 FEs, 1 CE and a L2 switch used for internal traffic

switching. The IxN2X router tester is used as testing means at both data- and control-planes, since (i) it generates IP over VLAN

traffic flows; (ii) it measures the DROP router data-plane performance in terms of throughput, packet losses and latencies; (iii) it emulates OSPF routers connected to the system under test.

FE1

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L2Switch

DROP Router

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IxN2X Router Testern VLANs for each PHY

n VLANs for each PHY




!" L3 full-meshed traffic matrix (from every L2T to all the other L2Ts);

!" Measurements on each VLAN in terms of packet losses and latency times

!" Emulation of m OSPFrouters connected to the system under test L2Ts

Figure 3. Throughput of traffic carried by a L2VL (VLAN) during a re-mapping process on both the line-card going to sleep, and the new one. The figure also reports the time instants (measured by the IxN2X) of OSPF signaling packets generated and received by the

DROP router.

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f)F# /"3# *1'&>&1"(1# 41*9)*./"(1#

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ACKNOWLEDGMENTS#@%&'#;)*:#;/'#',44)*$13#+5#$%1#MH=`M@#/"3#$%1#@NM`O#M,*)41/"# 4*)01($'-# 9,"313# ,"31*# $%1# e*/.1;)*:#Q*)8*/..1#b-#$%1.1#!H@7I__a<S<S<#

REFERENCES KSL N<D)>>/-#N<D*,'(%&-#n<H%*&'$1"'1"-#e<H,((%&1$$&-#e<O/2)>&-#

F<F&"8%-#[@%1#Q)$1"$&/>#!.4/($#)9#R*11"#@1(%")>)8&1'#&"#`16$#R1"1*/$&)"#G&*1>&"1#`1$;)*:'#7#!'#@%1*1#N)).#9)*#M"1*85#F/2&"8'#=4$&.&C/$&)"o-\#!MMM#H)..,"&(/$&)"'-#$)#/441/*#&"#`)2<#I_S_#&'',1<#

KIL p<H%/+/*1:-#p<F)..1*'-#Q<D/*9)*3-#H<M'$/"-#O<@'&/"8-#F<G*&8%$-#[Q);1*#X;/*1"1''#&"#`1$;)*:#O1'&8"#/"3#N),$&"8-\#Q*)(<#!MMM#!"9)().A_a-#Q%)1"&6-#Xq-#X4*<#I__c<#

KUL p<D/>&8/-#N<X5*1-#n<^&"$)"-#N<F<@,(:1*-#[Q%)$)"&(#';&$(%&"8#/"3#$%1#1"1*85#+)$$>1"1(:-\#Q*)(<#!"$1*"/$<#H)"9<#Q%)$)"&('#&"#F;&$(%&"8-#F/"#e*/"(&'()-#HX-#TFX-#I__b<#

KVL X<H&/"9*/"&-#P<E&'$/"$&-#g<M*/.)-#P<P/*/CC/-#M<g&$$)*&"&-#rX"#1"1*85#'/2&"8#*),$&"8#/>8)*&$%.#9)*#/#8*11"#=FQe#4*)$)()>-r#Q*)(<#!MMM#!"9)().sS_-#F/"#O&18)-#HX-#I_S_<#

KWL p<N1'$*14)-#H<R*,+1*-#H<P/(%)(/-#[M"1*85#Q*)9&>1#X;/*1#N),$&"8-\#Q*)(<#!MMM#R*11"H)..A_a-#O*1'31"-#R1*./"5-#p,"1#I__a<#

KJL h<G/"8-#M<n1>>1*-#D<D&':1+)*"-#p<2/"#31*#P1*;1-#p<N169)*3-#rg&*$,/>#N),$1*'#)"#$%1#P)21B#E&21#N),$1*#P&8*/$&)"#/'#/#`1$;)*:7P/"/81.1"$#Q*&.&$&21-r#Q*)(<#XHP#F!RH=PP-#F1/$$>1-#GX-#X,8<#I__c<#

KbL N<D)>>/-#N<D*,'(%&-#R<E/./""/-#X<N/"&1*&-#[ON=QB#X"#=41"7F),*(1#Q*)01($#$);/*3'#O&'$*&+,$13#FG#N),$1*#X*(%&$1($,*1'-[#Q*)(<#!MMM#R>)+1H).A_a-#^)")>,>,-#^/;/&&-#TFX-#O1(<#I__a#

Table I. Maximum number of line-cards than can be put to sleep according to different traffic volumes.

! Network topology 1(159 nodes, 614 links)

Network topology 2(244 nodes, 1080 links)

bWj# VIj# VW<bj#

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Table II. Energy consumptions and savings according to different traffic volumes and the two physical topologies.

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#Figure 4. Remapping times according to the number of L2VLs

per PHY, and to the number of routing table entries to be updated during the migration process.

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