INE R&S 4.0 Notes

IOScollection

http://certs4u.info/ciscoios/

Stoptracertwhileyou'reonaCiscodeviceviaaCiscoterminalserver(C2500)

Ctrl+Shift+6+6

iftelnettoaCiscodevice,justdoCtrl+Shift+6+x

1.xrouter-in-a-stick
switchmdoetrunk
switchtrunkcncapdot1q
switchtrunkallowedvlan

1.8
SW1(C3560)notchannellingwithSW3(C3550)
memeberportsonSW1arestuckin"errordisable"

SW3(C3550)notchannellingwithSW4(C3550)
C3550notcapableofauto-mid,it'srequiredtouseacrossovercable

SW3notgettingudpatesfromVTPserver
1.makeSW1therootbridgeforvlan1
2.deletevlan.datonSW3
3.reloadSW3
4.configureSW3tobevtpserver,thenfallbacktovtpclient

1.9misSW4notgettingudpatesfromVTPserver)
http://ieoc.com/forums/t/7732.aspx?PageIndex=2

1.14misbehavior(mis-channelconfigdetectedevenifconfigslookfine)
bouncetrunkinterfaceorremovetrunkbeforemodifyittoanothertrunkingprotocol

http://jingyan.baidu.com/article/ab0b5630da5fffc15afa7d2f.html

1.17
it'saend-to-endchannel,LACPnotsupportedonSW1&SW4

debuspannevents
servicetimelog
loggconsole7

1.20
howwouldportpriorityimpactpathselection?
Alltie-breakingSTPdecisionsarebasedonthefollowingsequenceoffourconditions?
1.lowestrootbridgID
2.lowestrootpathcosttorootbridge
3.lowestsenderbridgeID
4.lowestsenderportID
herepathcost(19)equals,senderbridgeID(32778)equalstoo,theonlytie-breakingissenderportID.obviously0.21<16.20<128.19,soport21wins
hints:
portid=portpriority+portnumber
portpriorityissetto128bydefault

Prio.Nbristhepriorityadvertisedtoitsneighbor

1.21
forwardtime=listeningperiod+learningperiod,soforwardtimerissetto10

1.24
notethatUplinFastfeatureappliestothedirectfailureofthelocalrootport,whileBackBonefeatureworksonindirectfailureoccursupstream

1.25
removeuplinkrelatedconfigspriortourconfigs
notewebringdowninterfacesonupstreamswitch(sw4),insteadofSW2,totriggerdebuglogging

1.26
SW1_3560#sherrdisableflap-values

ICL
1.who'sistheISPtoprovisionICL?
2.howcanwebenefitfromICLintermsofcost?
3.willDMLonL3MPLS***phaseout,replacedbyICLsteadily?

1.34
notefa0/13'scostissetto500,000,not50,000

1.37
R2_Fa0/0:192.10.1.2
SW2_VLAN2:192.10.1.8
BB2_Fa0/0:192.10.1.254

abittricky
uall
ctrl+shit+6tostoptracert

2.1FRswitching

frame-relayroutein-dlciinterfaceout-interface-typeout-interface-numberout-dlci

ConfiguretheFrameRelayswitchingontheinterfaceusingtheframe-relayroutecommand,specifyingtheincomingDLCI,theoutgoinginterface,andthe

outgoingDLCI.NotethatFrameRelayswitchingcanbeconfiguredonlyonphysicalinterfaces.

http://www.edify100.com/Techfiles/Techfiles_Show_32.html

interfaceSerial0/2/0
ipaddress155.1.0.5255.255.255.0
encapsulationframe-relay
frame-relaymapip155.1.0.1501broadcast

notethatIP(.3.254&.2.254)ofFR'ssub-interfaceareallpingable,butnotIPoflocalinterface(s0/2/0)

2.4
R3config
!
ints1/2
encafram
!
ints1/2.100multi
ipadd155.1.100.3255.255.255.0
frameint304
frameint305
!

2.6
我要理解的概念是frame-relaymapip<ip-addr><dlci>broadcast這條命令中的broadcast的做用。

CiscoIOSCommandReference中對broadcast參數的解釋是：
(Optional)Forwardsbroadcaststothisaddresswhenmulticastisnot
enabled(seetheframe-relaymulticast-dlcicommandformore
informationaboutmulticasts).Thiskeywordalsosimplifiesthe
configurationofOpenShortestPathFirst(OSPF)(seethe「Usage
Guidelines」sectionformoredetail).

個人理解是，這將使frame-relay鏈路在該映射上支持broadcast，換句話說就是在該條PVC上支持broadcast。

那麼經過OSPF測試是比較好的一個選擇，OSPF經過組播地址224.0.0.5進行neighbor的發現和鄰接關係的創建，實驗結果就是上面的內容了，答案是確定的，在效果上，這

條命令實現了broadcast的傳遞。

interfaceSerial1/2
ipaddress100.1.1.3255.255.255.0
encapsulationframe-relay
frammapip100.1.1.1305

2.9
onFR
shframroute

configureR3toadd2ndserialinterface(s1/3)totheFRcloud
!
ints1/3
encafram
ipadd155.1.113.3255.255.255.0
!

loadbasicFRconfigsintoR1~R5,do"shframmap"toviewdynamicmapping

beforeloadfinalFRconfigs,do"clearframe-relayinarp"

R3:
ints1/3.999multi
frainter311
frainter312

interfaceSerial0/1/0
ipaddress155.1.45.5255.255.255.0
encapsulationframe-relay
nokeepalive
nofair-queue
frame-relaymapip155.1.45.4514broadcast

isFRdead?No,farfromit!!!
https://learningnetwork.cisco.com/thread/41529

2.15
p_w_picpathactuallinkswouldbelike"SW1-R5-SW3(R2)-SW2".SW1isnotpossibletogotoBB2viaSW2directly,insteadithastotraverseFRlinkbetweenR5and

R2.soweconfiureR5&R2tomakethembridges