BROCADE IP PRIMER

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Chapter Review Questions5. Which command enables Symmetric SLB in the virtual server config?a. sym-priorityb. sym-slbc. server backupd. sym-standby6. By default, how many retries does a Layer 3 health check perform beforedeclaring a failed health check?a. 2b. 3c. 4d. 17. I've configured a loopback address on my web servers. How would Ienable DSR?a. In the real server config, “port http dsr”b. In the virtual server config, “port http dsr”c. In the real server config, “enable dsr”d. In the virtual server config, “dsr”8. For well-known TCP/UDP protocols, what keyword would I use to enableLayer 7 health checks on my real server?a. port urlb. l7c. keepalived. url9. In Source NAT, what address will my real server see as the source IPaddress of the incoming traffic?a. The ServerIron's management IP addressb. The ServerIron's source-ip addressc. The VIP addressd. The client's IP addressBrocade IP Primer 353
Chapter 15: Server Load Balancing (SLB)10. I'm using DSR. When I perform a “show server real”, I don't see any “Rxpkts”or “Rx-octets”, but I see lots of “Tx-pkts” and “Tx-octets.” Why?a. You forgot to configure a loopback on your real serverb. You didn't enable DSR in the real server configc. Your real server port is not actived. In DSR, the ServerIron never sees return traffic; these counters areuselessAnswers to Review Questions1. d. This is where you would use a shadow port. You are binding to a differentport on the real server, but you are binding the same port (HTTP, inthis case) on the virtual server. Just make sure you've got “no port httptranslate” in your virtual server config.2. a. Round-robin just picks the next one in line. If a server is down, it skipsit, but other than that, it blindly sends to the next server.3. b. The ServerIrons continue their hello messages across the data linkuntil the sync link is restored. If the data link between the ServerIronsgoes down as well, answer C would be correct.4. b. All servers (including remote) are considered primary, unless they arespecifically configured as “backup.”5. a. “sym-priority” is the magic word. This is added to the virtual server configon all participating ServerIrons.6. c. It is 4.7. b. DSR is unique to the virtual server port, so it is enabled in the virtualserver config. The correct commands in this case are “port http dsr.”8. c. Tricky one. Most people think of the “port http url” command availablefor HTTP. But for all well-known Layer 7 protocols, you can use the keyword“keepalive” (e.g., “port smtp keepalive”) to trigger their unique Layer 7health check.9. b. The ServerIron's source-ip. This is the whole reason Source NAT works.If you missed this question, review Chapter 3. When the ServerIronreceives the packet, it substitutes the source-ip address (that is most“local” to the real server) as the source IP of the packet (as well as substitutingthe IP of the real server as the destination IP).10. d. So many engineers (and their bosses) have required an explanation ofthis. DSR is unique in that it's the only solution where the ServerIron doesnot see all the traffic. Given that, certain predictors and statistics will notbehave necessarily as expected.354 Brocade IP Primer
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BROCADEIPPRIMERFIRST EDITIONEveryth
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Important NoticeUse of this book co
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ContentsChapter 2: TCP/IP .........
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ContentsPart Three: Layer 3 Switchi
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ContentsRedundancy: Virtual Router
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ContentsCheck 5: Available Session
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Part One: Introduction toNetworking
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Networking Basics1The world of comp
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The OSI Reference ModelEach of thes
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The OSI Reference ModelApplicationA
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The Application Layer (Layer 7)This
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The Session Layer (Layer 5)You inte
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The Transport Layer (Layer 4)So, wh
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The Transport Layer (Layer 4)point,
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The Data Link Layer (Layer 2)By far
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The Physical Layer (Layer 1)One oth
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Layer 1 Ethernet (Cabling)What if a
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Layer 1 Ethernet (Cabling)Twisted P
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Console49F Link 50F1 3 5 7 9 1113 1
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Layer 1 Ethernet (Cabling)SC connec
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Layer 2 Ethernet (Addressing)Ethern
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Half-duplex vs. Full-duplexine, thi
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Brocade Ethernet Switches & Routers
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Chapter Review Questions5. What lay
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TCP/IP2The most popular protocol st
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Console49F Link 50F1 3 5 7 9 1113 1
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Network Classes128 64 32 16 8 4 2 1
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Network ClassesWhat we haven't talk
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The SubnetTable 2. Understanding Su
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Layer 4 TCP/IP: TCP/UDPRFC 1918 spe
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Layer 4 TCP/IP: TCP/UDPtions will a
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Transmission Control Protocol (TCP)
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User Datagram Protocol (UDP)When it
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Packet CapturingTcpdump is a comman
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SummaryYou'll typically need some s
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Chapter Review Questions3. What is
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Answers to Review Questionscan't us
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Data Center Bridging (DCB)3Introduc
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Introduction802.1Qbb: Priority-base
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The Ethernet PAUSE Functionresponsi
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Enhanced Tranmission SelectionFrom
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Data Center Bridge eXchangeData Cen
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Building the DCB CloudBuilding the
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Summary• Enhanced Transmission Se
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TRILL—Adding Multi-Pathingto Laye
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Why do we need it?To address this p
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The TRILL ProtocolJust as important
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Moving TRILL DataMAC-RB4MAC-RB1RB3R
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Load Balancing Basics5With the rise
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Co ns ol ePwrCC U1 PU 2 PU 3TxActRx
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Co ns ol ePwrActi veC PU 2 PU 3C PU
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Chapter Review Questions• Direct
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Chapter Review Questions7. Your loa
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Answers to Review Questions9. d. Yo
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Part Two: SwitchingThe following ch
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Accessing the CLIThis is not the on
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Online HelpFor your convenience, yo
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The configProbably the most recogni
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Software (and where it's stored)All
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Software (and where it's stored)Let
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show commandsThe copy command can b
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clear commandsThere's one more show
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Configuring the InterfaceHere's an
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PingSource . Particularly if you ar
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Filters and Regular ExpressionsThis
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User Access ControlUser Access Cont
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User Access ControlIf you were to c
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User Access ControlBy default, a ne
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User Access ControlYou can also con
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User Access ControlSNMP also allows
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The Web UIYou can see that you have
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SummaryBut what if you want to disa
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Chapter Review Questions2. Which RM
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Answers to Review Questions5. c. Th
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Switch TrunksYou define static trun
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show CommandsOperational trunks:Tru
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Chapter Review Questions3. Which ty
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Virtual Local Area Network(VLAN)8No
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Configuring VLANsNow, we need to se
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Configuring VLANsVLAN, and add it b
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VLAN GroupsYou also have to assign
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Chapter Review QuestionsChapter Rev
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Answers to Review Questions4. a. An
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IEEE 802.1d (Spanning Tree Protocol
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IEEE 802.1d (Spanning Tree Protocol
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IEEE 802.1s (MST)Port IEEE 802.1W P
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IEEE 802.1s (MST)another instance o
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SummaryWe need to define this on bo
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Chapter Review Questions4. BPDUs:a.
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Part Three: Layer 3Switching (Routi
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The Routing TableLet's take a momen
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The “Null” RouteTo see RIP's ro
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Chapter Review Questions2. What is
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Open Shortest Path First(OSPF)11We
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Getting to Know Your NeighborsHello
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Autonomous Systems (AS)This still d
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Link State Advertisement (LSA)A NSS
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Configuring OSPFIf you use a loopba
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Configuring OSPFHere's an example t
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Summary• show ip ospf virtual-lin
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Chapter Review Questions3. By defau
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Multi Protocol LabelSwitching (MPLS
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What is MPLS?Step 4. The labeled pa
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MPLS Virtual Leased Lines (VLL)Step
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MPLS Layer 3 VPNsTo validate the co
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MPLS Layer 3 VPNsConfiguring MPLS L
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Border Gateway Protocol(BGP)13For m
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The Autonomous System (AS)As of 201
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Configuring BGPTo summarize, the pe
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Configuring BGPBut how do we use ou
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SummarySummary• BGP is the standa
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Answers to Review Questions7. What
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Security, Redundancyand More14We've
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Security: Access Control Lists (ACL
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Page 318 and 319: Security: Access Control Lists (ACL
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Page 324 and 325: Access Control Lists: Not Just For
Page 326 and 327: Redundancy: Virtual Router Redundan
Page 332 and 333: SummaryThe other processing mechani
Page 334 and 335: Chapter Review QuestionsChapter Rev
Page 336 and 337: Answers to Review QuestionsAnswers
Page 338 and 339: Part Four: Layer 4-7Switching (Load
Page 340 and 341: Server Load Balancing (SLB)15Welcom
Page 342 and 343: The Brocade ServerIronThe Managemen
Page 344 and 345: The Brocade ServerIronAttackerEcho
Page 346 and 347: ServerIronThe Brocade ServerIrondoe
Page 348 and 349: Predictors• Round-robin. This is
Page 350 and 351: Configuring SLBGoing back to our in
Page 352 and 353: Configuring SLBWhen a real server p
Page 354 and 355: SLB show CommandsSLB show CommandsT
Page 356 and 357: SLB show Commands• Active (ACT).
Page 358 and 359: Configuring Direct Server Return (D
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Page 362 and 363: Symmetric Server Load BalancingIf y
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Page 394 and 395: FWLB show CommandsAs we mentioned a
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Page 402 and 403: Global Server Load Balancing(GSLB)1
Page 404 and 405: Domain Name Service (DNS)take the n
Page 406 and 407: Enter: Global Server Load Balancing
Page 408 and 409: How Does GSLB Decide?Now, I mention
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Page 412 and 413: Configuring GSLBIt's the address of
Page 414 and 415: GSLB show CommandsNext, there may b
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Answers to Review Questions5. b. Th
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Glossary10Base-T An Ethernet specif
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GlossaryAuthentication This is the
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GlossaryDCB Data Center Bridging. T
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GlossaryFrame This is the data unit
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GlossaryLACPDU Link Aggregation Con
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GlossaryNIC Network Interface Contr
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GlossaryRoot switch In Spanning Tre
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GlossaryTAC Technical Assistance Ce
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GlossaryVirtual link In OSPF, all a
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BROCADE IP PRIMERFIRST EDITIONThe w
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BROCADE IP PRIMER

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