JNCIE Command Reference文档格式.docx

JNCIE Command Reference文档格式.docx

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showldptraffic-statistics（noconfig）|showlogr7/ldp-stats

showldpinterface

showldpneighbor

showldpsession

showroutetableinet.3---egressrouter’sloopbackaddress

showroutetablempls.0

---left:

inlabel,right:

swaplabel/pop

showldpdatabase（Label-FEC）

Notes:

Ø

AutomaticallyestablishLSPsbetweentheloopbackaddressesofallLDP-enabledrouters（canbemodifiedwiththeuseofthetransport-addresskeywordintheldpstanza）.

Bydefault,theJUNOSsoftwareimplementationofLDPadvertisesaFECfor/32interfaceroutesonly.

LDPisrelianceontheIGPtopreventloopsmeansthereisnoneedtoimplementsomeformofsplithorizon.

LDPsignaledLSPsarenotdisplayedintheoutputoftheshowmplslspcommand（onlyRSVPlisted）

onlythetrafficassociatedwithBGPnexthopsthatresolvethroughinet.3willbetransportedoveranLSP（showrouteresolution）

[editlogical-routersr7protocolsldp]---defaultmetricis1ininet.3

root@JNCIE#settrack-igp-metric

2.RSVPSignaledLSPs

[editinterfaces]

lab@r1#setfe-0/0/0.0familympls

[editprotocolsmpls]

lab@r1#setinterfaceall

[editprotocolsrsvp]---EnableRSVPSignaling

lab@r3#setinterfaceall---recommenddisablingfxp0

showrsvpinterface

showrsvpneighbor---RSVPneighborsaredetectedonly

whenLSPsareactuallysignaled

[editprotocolsrsvp]

lab@r1#setinterfacefe-0/0/1authentication-keyjnx

[editprotocolsmpls]

lab@r1#setlabel-switched-pathr1-r7to10.0.9.7bandwidth10m

[editprotocolsmpls]---withmultipleTEDdomains

lab@r1#setlabel-switched-pathr1-r7no-cspf

showrsvpsession

showmplslsp

showroutetablempls.0

label-switched-path

Troubleshoot:

traceoptions{

filersvp;

flagerrordetail;

flagpathdetail;

flagpathteardetail;

}

[editlogical-routersr7protocolsmplslabel-switched-pathr7-r3]

root@JNCIE#setmetric30---defaultisIGP’sbestroutemetricininet.3

3.EROConstraints

lab@r2#setlabel-switched-pathr2-r6primaryvisit-r7-r5

[editprotocolsmpls]---EROsareconsideredstrictbydefault

lab@r2#setpathvisit-r7-r510.0.4.9

10.0.9.7loose

loopbackaddressesshouldnotbeusedinconjunctionwithstricthops,becausebydefinitionastricthopshouldbedirectlyconnected.

youcanuseastricthopEROpointingtoaneighbor’sloopbackinterfacewhenCSPFisusedtocomputetheLSP’spath.

4.LinkColoring

[editprotocolsmpls]---color-to-numericmappings

lab@r3#setadmin-groupsblue4（bitposition）.

lab@r3#setinterfaceso-0/2/0.100admin-groupblue

[editprotocolsmplslabel-switched-pathr4-r3]

lab@r4#setadmin-groupinclude-anyredexcludeblue

showmplslspextensive（CSPFinformation）

showteddatabaseextensive|match"

nodeid|to|color"

filecspf;

flagcspf;

flagcspf-link;

flagcspf-node;

aboutCSPF

Can’tuseCSPF（coulduseEROs）whenthenetwordhavemultipleroutingdomains（protocols）orMulti-LevelIS-ISorMulti-AreaOSPF,becauseTEinformationisn’tleakedbetweenIS-ISlevelsorOSPFareas

JUNOSdoesoffersupportforLSPstitching

CSPFincludethecomputationofFastReroutedetours,linkbypass,LSPre-optimization,andtheuseoflinkcoloring

5.InstallingPrefixes（precisecontrol）

[editprotocolsmplslabel-switched-pathr6-r1]---putininet.3

lab@r6#setinstall10.0.5.254

[editprotocolsmplslabel-switched-pathr6-r1]---moveintoinet.0

lab@r6#setinstall10.0.5/24active

withmultipleequal-costLSPsexisttothesamedestination,defaultrandomlybalancetrafficonaper-prefixbasis

bydefaut,onlyLSPegress/32prefixisinstalledintheinet.3

6.TEShortcuts

label-switched-pathr6-r3to10.0.3.3---mustinasinglerouting-domain

[editprotocolsisis]---automaticinstallationofallprefixesthat

areconsidereddownstreamoftheLSPegressputintotheinet.3orinet.0

⏹lab@r6#settraffic-engineeringshortcuts

[editprotocolsmpls]---moveallintoinet.0

●lab@r6#settraffic-engineeringbgp-igp

variousotherdestinationsalsobeingmappedtother6–r3LSP,thiscanbeproblematic（makingtheuseofinstallgenerallypreferred）.

theLDPsignaledLSPhasalsobeenmovedintotheinet.0

[editprotocolsmpls]---keepLDP/RSVP/32prefixininet.3

●lab@r6#settraffic-engineeringbgp-igp-both-ribs

[editprotocolsmpls]---@=RoutingUseOnly,#=ForwardingUseOnly

keepIGProutesbeingactiveforroutingpolicyuse

✓lab@r6#settraffic-engineeringmpls-forwarding

7.Prefix-to-LSPMapping

a）forwardingtablepolicyattheLSPingressnode

[editlogical-routersr7policy-optionspolicy-statementlsp-map]

term1{

from{

protocolbgp;

neighbor10.0.3.3;

route-filter0.0.0.0/0upto/24;

}

then{

install-nexthoplspr7-r3;

accept;

term2{

install-nexthoplspr7-r3-prime;

}

lab@r7#setforwarding-tableexportlsp-map

b）BGPnexthopmanipulationattheLSPegressnode

listingr3’slo0interfaceunderitsarea0definition,whichresultsintheadvertisementofboththeprimaryandsecondarylo0addresses.

asecondarylo0addresswillnotbeadvertisedintotheTED,sodisablecspf

IBGPexportpolicywillbeusedattheLSPegressnodetoselectivelysettheBGPnexthoptothedesiredLSPegressaddress

8.SecondaryPaths

[editprotocolsmplslabel-switched-pathr1-r7]---establishthesecondarypathbeforetheprimarypathfailed

lab@r1#setsecondaryr1-r7-primestandby

[editprotocolsmplslabel-switched-pathr1-r7]---changetheRSVPreservationstylefromthedefaultFixedFilter（FF）toaSharedExplicit（SE）style

lab@r1#setadaptive

candefinemanysecondarypaths,butonlyoneestablishedatime

defineonlysecondarypathstopreventrevertingbacktoprimary（notswitchamongsecondarypaths）

9.FastRerouteandLinkProtection

[editprotocolsmplslabel-switched-pathr6-r4]---protecttheentireLSP,useTEDtolocatedetourpathswhileregardlessofCSPF

lab@r6#setfast-reroute

--------------------------------------------------------

[editprotocolsmplslabel-switched-pathr6-r4]---protectaspecificinterface,makesuseofaTEDandtheCSPF

lab@r6#setlink-protection

[editprotocolsrsvp]

lab@r3#setinterfaceso-0/2/0.100link-protection（path---ERO）

showrsvpsessioningressdetail（onfailedrouter）

AkeypointtoconsiderwhendealingwithbothFastRerouteandlinkprotectionistheneedforaTEDwithsufficientinformationtoallowasuccessfulCSPFcalculation

10.Preemption（setupandholdpriority）

[editprotocolsmplslabel-switched-pathr5-r1]

lab@r5#setpriorityxx---default7（weak）0（strong）

10.Control-TTL

[editprotocolsmplslabel-switched-pathr2-r6]---onlyatingress

lab@r2#setno-decrement-ttl

[editprotocolsmpls]---atallnodesalongtheLSP,supportmulti-vendors

lab@r2#setno-propagate-ttl

11.Validatethedataplanewithoutusingexternalprefixesormodifyingdefaultroutingtableintegration.

[editinterfaces]---theMPLSpingmechanismalwaystargetsadestinationaddressof127.0.0.1

lab@r1#setlo0.0familyinetaddress127.0.0.1

pingmplsrsvpr5-r1

12.Ultimatehoppopping

[editprotocolsldp/mpls]---why?

patibility2.CoS

lab@r6#setexplicit-null

13.Automaticabandwidthreservation

lab@r4#setstatisticsfilempls-stats

setstatisticsauto-bandwidth

[editprotocolsmplslabel-switched-pathr4-r3]–--default86400s

lab@r4#setauto-bandwidthminimum-bandwidth1madjust-interval300

14.RSVP-basedLDPtunneling

[editprotocolsmplslabel-switched-pathr1-r7]---

lab@r1#setldp-tunneling

[editprotocolsldp]---

lab@r1#setinterfacelo0.0

Layer3VPNs（2547bis）

1.StaticandBGProutingforPE-CEconnection

[editrouting-instancesc2]

lab@r6#setinstance-typevrf

[editrouting-instancesc2]---connecttoce

lab@r6#setinterfacefe-0/1/3

[editrouting-instancesc2]---defaultVRFpolicy:

automaticllyadvertiseandreceive;

theroutesfromCEaswellasthevrf’sstaticanddirectroutes;

localroutescan’tbeexported;

lab@r6#setvrf-targettarget:

65412:

420

[editrouting-options]---automatic

lab@r6#setroute-distinguisher-id10.0.9.6

[editrouting-instancesc2]---manual

lab@r6#setroute-distinguisheras:

nnorip:

nn

[editrouting-instancesc2routing-options]

lab@r6#setstaticroute220.220/16next-hop172.16.0.10

ping220.220.0.1routing-instancec2

[editrouting-instancesc2protocolbgpgroupc1]

lab@r4#settypeexternalpeer-as65010neighbor172.16.0.6

showbgpsummary[instancec1]

showroutetablec1

[editrouting-instancesc2]---performend-to-endpingandtraceroute

lab@r6#setvrf-table-label

2.MP-BGPamongPE-PE

[editprotocolsbgpgroupintneighbor10.0.9.6]---bothaddressfamilyenabled

lab@r4#show

familyinet{

unicast;

familyinet-vpn{

showroutetablebgp.l3vpn.0

showrout