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adjacencies (continued) IGPs and, 194 IS-IS, 275, 353–356, 362, 368, 378–380 management interface and, 215 OSPF, 385, 387, 392, 414 overwhelming, 318 restarting protocols, 277–281 ADM (add/drop multiplexer), 236–238 Adm field (route distinguisher), 554 admin permission bit, 90 admin-control permission bit, 90 advertising active routes, 284 BGP and, 419, 426, 475 graceful restart and, 279 IP addresses, 221 IS-IS and, 351 OSPF and, 285, 288, 383, 395, 406 poison reverse technique, 332 prefixes, 271, 292 private addresses, 298 removing private AS numbers, 441, 442 restricting routes, 448–450 RIP routes, 338, 339 RIPng routes, 340 routes, 247, 282 routing information, 248, 269 routing policy and, 282, 285, 286, 333 split horizon technique, 332 static routes, 284, 285 AFI (address family identifier), 350 AfriNIC registry, 419 agents (SNMP server) community strings and, 138 configuring routers, 133–134 defined, 130 monitoring routers, 153–155 remote monitoring, 151 SMIs and, 130 Aggregate Route-based IP Switching (ARIS), 479 aggregation link, 223–224 route, 269, 270 AGGREGATOR attribute (BGP), 422 AH (Authentication Header), 106, 107, 109 alarmTable object, 152 all permission bit, 89, 90 allow-commands attribute (TACACS+), 98 allow-configuration attribute (TACACS+), 98 allowed keyword, 274 /altconfig directory, 43, 44 /altroot directory, 43, 44 AN field (route distinguisher), 554 angle brackets (< >), 64 annotate command, 21 anonymous FTP, 49 any facility, 163, 167 anycast PIM, 596–598 anycast RP, 592–595 any-source multicast (ASM), 605 APNIC registry, 419 Application-Specific Integrated Circuits (see ASICs) APS (Automatic Protection Switching), 192, 236–238 APS 1+1 switching, 236 area border routers (see ABRs) area identifier (IS-IS), 350, 355 areas AS and, 350 defined, 383 ARIN domain registry, 265, 419 ARIS (Aggregate Route-based IP Switching), 479 ARPANET project, 332 AS (autonomous system) active routes and, 250 adding BGP community, 465, 469 authenticating BGP peers, 450 BGP and, 418, 419 BGP LOCAL_PREF attribute and, 441 BGP NEXT_HOP attribute and, 439 configuring BGP, 431–436 configuring BGP sessions, 422–431 EGPs and, 418 filtering routes based on paths, 445–448 hackers and, 72 IS-IS and, 349, 350 label-switched paths and, 483 load balancing traffic, 472 multipath BGP, 473 OSPF and, 383 prepending numbers to path, 443–444 removing private numbers, 441, 442 RSVP and, 484 setting up route reflectors, 452, 456 AS boundary routers (see ASBRs) AS Module (ASM), 580 AS PICs configuring PIM-SM, 580 dynamic SAs, 113, 116–120 AS_PATH attribute (BGP) configuring BGP sessions, 430 description, 421 624 | Index This is the Title of the Book, eMatter Edition Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved.
filtering routes based on, 445 prepending AS numbers to path, 443 removing private AS numbers, 442 removing private AS numbers from path, 442 AS_SEQUENCE attribute (BGP), 421 AS_SET attribute (BGP), 421 ASBRs (AS boundary routers) defined, 383 NSSAs and, 384, 399, 400 stub areas and, 398 ASICs (Application-Specific Integrated Circuits) forwarding packets, xvii IP routing, 248 IPSec and, 117 load balancing traffic flows, 272 ASM (any-source multicast), 605 ASM (AS Module), 580 ASN.1 (Abstract Syntax Notation 1), 132 as-path-prepend action (BGP), 290 asterisk (*), 252, 258 asymmetric mode, 186 Asynchronous Transfer Mode (see ATM) ATM (Asynchronous Transfer Mode) configuring interfaces, 238–240 configuring neighbors, 385 label-switched paths and, 480 MPLS and, 479 ATM Forum, 479 atomic clock, 181 ATOMIC_AGGREGATE attribute (BGP), 421 Attached (ATT) bit set, 363 attributes, BGP, 420–422 AUTH facility code, 163, 168 authentication address spoofing and, 266 BGP peers, 450–452 configuring SNMP and, 154 dynamic SAs, 106, 109, 119 group login accounts, 88 IPSec and, 106, 107 IS-IS, 366–368 LDP, 498–500 login accounts, 83 NTP and, 187–188 OSPF, 382, 402–405 remote, 86, 87 RIP and, 333, 334, 342, 343 root, 77–79 router security and, 74 RSVP, 519–520 setting methods, 80–81 SNMP and, 129, 133, 153 Authentication Header (AH), 106, 107, 109 authentication keyword, 137 authentication-md5 keyword, 153 authorization facility, 163, 168 AUTHPRIV facility code, 163 autobandwidth (MPLS), 535–537 Automatic Protection Switching (APS), 192, 236–238 autonomous system (see AS) auto-RP configuring, 585 creating RPs, 584 dynamically mapping with, 585–589 B backbone area (OSPF), 383, 384 backing up filesystems, 43–46 J-series routers, 46–48 M-series routers, 43–46 router configuration, 34–37 T-series routers, 43–46 backplane (router), 151 backup designated router (see BDR) bandwidth reservations adaptive mode, 527 CSPF and, 485 label-switched paths and, 528, 539, 540 Path message and, 484 RSVP, 484, 525 bandwidth, allocating, 535–537 BCD (binary-coded decimal), 350 BDR (backup designated router) DR and, 386 OSPF and, 383, 387, 394, 414 Bellman-Ford algorithm, 332 BERT (Bit Error Rate Test), 192, 229–231 BFD (Bidirectional Forwarding Protocol), 376, 410 BGP (Border Gateway Protocol) adding community to routes, 465–471 adjusting NEXT_HOP attribute, 439 attributes, 420–422 authenticating peers, 450–452 chaining policies, 297, 298 changing routing information, 290–291 configuring, 431–436 configuring addresses, 206 configuring interfaces, 194 Index | 625 This is the Title of the Book, eMatter Edition Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved.
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JUNOS Cookbook
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JUNOS Cookbook Aviva Garrett Beijin
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Table of Contents Foreword . . . .
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3. IPSec . . . . . . . . . . . . .
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8.5 Creating Static Routes 263 8.6
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13.5 Adjusting Local Preference Val
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Foreword The early days at Juniper
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Throughout 1997 and early 1998, all
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Preface1 Over the past decade, netw
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Organization As the name suggests,
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Constant width Used for code sectio
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Chapter 1 CHAPTER 1 Router Configur
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You can use a number of operational
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The show command displays the items
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Each listed completion is the confi
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command on the left side of the pip
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The > tells you that you are in ope
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} } } root@# commit root@router1# e
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For the initial router configuratio
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At this point in configuring the ro
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1.4 Displaying the Commands to Recr
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Discussion It is generally good pra
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is often the first thing to check w
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In this example, the error is in th
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To track down what changed in the c
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Solution Use the following command
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login { class superuser-local { per
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If PIM is not yet configured, merge
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You can also save it to a file in y
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These files are also compressed. av
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You see that the running configurat
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Solution The rollback configuration
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See Also Recipe 1.17 1.19 Backing U
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ad1 11513 MB IBM-DARA-212000 AH0AHG
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J-series filesystems on a device co
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1.22 Installing a Different Softwar
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Use the request system software add
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support site (http://www.juniper.ne
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JUNOS 7.0 was released in the fourt
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Some of the main processes are MGD,
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switching board (the SSB), and two
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1.28 Gathering Information Before C
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The apply-groups statement causes t
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} } } address 10.0.16.1/24; Finally
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The commit synchronize command comm
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modules/ packages/ proc/ root/ sbin
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At this point, you can also upgrade
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lets them gain access to the router
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client/server systems—the RADIUS
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You need to enable FTP only if you
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use of the root account. Logging in
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A slight twist to this recipe is to
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Also, you will not be able to commi
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Solution Set all plain-text passwor
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Discussion When you want users to b
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individual user accounts with passw
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ead-only Can perform all actions in
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If you try to enter a command that
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aviva@router1# set class operator-p
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If you use a centralized server, it
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aviva@RouterF# set term ssh-telnet
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statement in the configuration, whi
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een idle, and what they are doing.
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Mike would be logged out: mike@rout
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Encryption, which is the encoding o
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networks, it does not scale well. A
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} } [edit interfaces] es-3/0/0 { #
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have to set up an IKE SA and a fire
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Here’s what the relevant portions
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Finally, configure the domain’s I
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Configure the security gateway rout
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[edit protocols ospf area 0.0.0.0]
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Then, configure the IPSec tunnel to
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Issuer: Organization: mycompany, Co
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Alternate subject: RouterB.mycompan
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Chapter 4 CHAPTER 4 SNMP4 4.0 Intro
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juniperMIB, which is the top node o
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Juniper Networks provides several d
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4.2 Setting Router Information for
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Table 4-1. SNMP trap categories Key
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Solution You can add a term to the
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You might want to give access to al
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aviva@router1> show snmp mib get "j
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4.9 Collecting Router Operational I
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CPU utilization: User 0 percent Bac
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Table 4-2. System logging severity
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Discussion RMON is an SNMP specific
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See Also RFC 2819, Remote Network M
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nms1 sha/3des nonvolatile active Gr
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Again, this recipe is somewhat invo
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Finally, configure which traps the
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} notify chassis-notification-list
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Some are the same as those used by
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Solution Use the following commands
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5.2 Limiting the Messages Collected
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Discussion The default maximum size
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no longer need. Here, we logged RIP
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Discussion This configuration redir
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This command causes all messages se
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Apr 29 22:55:16 router xntpd[4977]:
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The traceoption flags indicate the
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Chapter 6 CHAPTER 6 NTP6 6.0 Introd
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6.2 Setting the Time Zone Problem Y
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Engine boots, the ntpdate utility r
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You can also have all the routers s
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6.6 Checking NTP Status Problem You
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Chapter 7 CHAPTER 7 Router Interfac
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under the name of the interface and
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Solution Use the show interfaces co
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the physical interface. It allows y
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Solution The show interfaces extens
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Broadcast packets 0 [0] Multicast p
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Input packets : 5 Output packets: 5
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1.0.12.2/30 so-1/0/0 Mars 1.0.0.1/3
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To remove an extra IP address, use
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Discussion For MPLS traffic to tran
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Flags: None Addresses, Flags: Is-Pr
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Solution Configure the router’s m
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On an M-series or a T-series router
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You can confirm the presence of the
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Protocol inet6, MTU: 1500 Flags: Is
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Solution Use the Virtual Router Red
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Solution There are three steps to s
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7.16 Configuring T1 Interfaces Prob
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Run the loopback test, which sends
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7.18 Setting Up a BERT Test on a T1
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You can configure an error rate to
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Discussion Synchronous Optical Netw
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SEF 22 182 OK LOS 22 1 OK LOF 22 1
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Use the show aps command to check t
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type of ATM PIC, the configuration
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gre up ipip up lo0 up up lo0.0 up u
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Solution Add the new interface to t
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While this does what you want, it m
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When a single routing protocol prov
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IPv6 uses 128-bit addresses that co
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8.1 Viewing the Routes in the Routi
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oute is learned from a dynamic rout
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} } family iso { address 49.0020.19
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8.2 Viewing Routes to a Particular
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8.3 Viewing Routes Learned from a S
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ff00::/8 perm 0 mdsc 53 1 ff02::1/1
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The actual forwarding tables that t
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and the traffic to these networks i
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Attacker A B Target Real source add
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Check the firewall filter counts wi
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Solution Create a routing policy th
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Discussion Martian addresses are pr
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Solution After configuring both OSP
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To verify the preference change, lo
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Peer supports Refresh capability (2
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This recipe shows how to enable gra
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Because the policy and filter condi
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then accept; } } } protocols { ospf
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The first command in the recipe def
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[edit] aviva@router1# set protocols
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Table 9-4. Actions that change rout
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(called longest-match lookup), so t
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aviva@router1# set term 2 then reje
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See Also IANA, http://www.iana.org/
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the community string from the route
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used to verify that the router is m
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} } Discussion } } Placing firewall
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Table 9-5. Header match conditions
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counterintuitive. However, understa
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protocol-except tcp; } then { count
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protocol tcp; destination-port [ te
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Firewall filter terms are evaluated
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9.12 Using a Firewall Filter to Cou
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04:58:41 pfe A t1-0/0/3.0 TCP 10.0.
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which traffic is more important and
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The next term allows TCP traffic: [
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Routing Engine, you want to make su
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from { source-address { 10.0.8.0/24
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9.16 Rate-Limiting Traffic Flow to
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list of IP addresses in one place i
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lished TCP connections and you sudd
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By default, the JUNOS software impl
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} } } neighbor fe-0/0/0.0; neighbor
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10.0.0.0/24 *[Direct/0] 2w4d 23:05:
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The routing policy you set up is a
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so the inbound metrics are 1. The m
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can use it in the authentication-ke
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10.6 Sending Version 1 Update Messa
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Mar 31 10:11:13 Group beta-rip-grou
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Chapter 11 CHAPTER 11 IS-IS11 11.0
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oundary. This means that the IS-IS
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might be useful when migrating two
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Interface System L State Hold (secs
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RouterA.02-00 0x59 0xeda9 632 L1 L2
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The next four lines show the IP pre
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configuring the preference statemen
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11.5 Configuring a Level 1-Only Rou
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11.6 Controlling DIS Election Probl
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key, or password, for each interfac
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} } from protocol static; then acce
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Again, we expect the metric to chan
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RouterA Level 2 RouterB Level 2 Rou
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Increasing the IS-IS cost of Router
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11.12 Moving IS-IS Traffic off a Ro
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11.14 Tracing IS-IS Protocol Traffi
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Using some of the other flags, you
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OSPF views routers as nodes, which
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Area 0.0.0.0 RouterG lo0:192.168.19
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Another common problem in establish
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The route entries starting with [OS
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entries that originated from the lo
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OSPF network. Route 192.168.18.1:0.
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Checking on RouterA at the other en
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192.168.19.1/32 *[Direct/0] 3d 01:5
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The routers in the stub area no lon
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Router 192.168.16.1 192.168.16.1 0x
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Solution You configure MD5 authenti
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Use the show ospf interface detail
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With the default metric, traffic fr
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12.12 Improving OSPF Convergence Ti
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This output shows two BFD sessions
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aviva@RouterG# commit aviva@RouterG
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Jun 14 22:00:26 CHANGE 192.168.17.1
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Jun 13 16:55:20 IP Route added with
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list of ASs to see whether a route
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E Route was originally learned from
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Then configure an EBGP session to t
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NLRI for this session: inet-unicast
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Next is information about routes le
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Looking at the remote peer router,
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* 10.0.31.0/24 Self I * 172.19.121.
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aviva@RouterE> show bgp summary Gro
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to 10.0.31.1 via t1-0/0/3.0 10.0.29
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lem with BGP itself. When the TCP s
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13.4 Adjusting the Next-Hop Attribu
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The first configuration in this rec
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13.7 Prepending AS Numbers to the A
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13.8 Filtering BGP Routes Based on
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Translated, this match looks for fo
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Type: External State: Established F
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This recipe configures MD5 authenti
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oute reflector system has a set of
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10.0.24.0/24 *[BGP/170] 00:18:38, l
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AS 65500 Sub-AS 65501 RouterF 192.1
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figure-of-merit value correlates to
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Once the routing policy is set up,
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change, the router will unsuppress
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See Also RFC 2439, BGP Route Flap D
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You see that the route to 192.168.1
Page 493 and 494:
When setting up policies, also crea
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} See Also next-hop 192.0.2.1; acce
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Another restriction for multipath B
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This forwarding table is then copie
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BGP establishes the connection, fro
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Chapter 14a CHAPTER 14 MPLS14 14.0
Page 505 and 506:
Layer 2 header MPLS header Layer 3
Page 507 and 508:
RouterG 192.168.19.1 Ingress router
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The main difference between LDP and
Page 511 and 512:
family to the t1-4/0/0 interface; o
Page 513 and 514:
Also verify the MPLS-enabled interf
Page 515 and 516:
The first line of the output shows
Page 517 and 518:
aviva@RouterG> show configuration p
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via t1-4/0/0.0, Push 100000 192.168
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aviva@RouterG> show route forwardin
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This recipe shows how to configure
Page 525 and 526:
Oct 5 19:25:52 Msg Hello (0x100), l
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aviva@R3# set rsvp interface fxp0.0
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fxp0 up up fxp0.0 up up inet 192.16
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aviva@R1> show rsvp interface RSVP
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y 13:31:06 the LSP was up and runni
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10.0.0.6 10.0.0.1 Up 0 1 FF 3 - R1-
Page 537 and 538:
Solution On the ingress router, loo
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for LSP signaling. On the egress an
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Discussion There are several ways t
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14.9 Verifying that the RSVP-Signal
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14.11 Protecting an LSP’s Path Pr
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RSVP RRO in the path calculation lo
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The configuration allocates 50 Mbps
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However, RSVP cannot establish the
Page 553 and 554:
Solution Fast reroute reduces packe
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PATH sentto: 10.1.13.2 (so-0/0/2.0)
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The RSVP interface status shows tha
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14.13 Automatically Allocating Band
Page 561 and 562:
Then examine the history of the LSP
Page 563 and 564:
To understand how preemption works,
Page 565 and 566:
10.0.0.5 From: 10.0.0.1, State: Up,
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9 Oct 14 10:51:20 Deselected as act
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The router knows how to reach its i
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10.1.13.1/32 *[Local/0] 2d 20:39:51
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aviva@R1> clear log rsvp-trace-log
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PATH rcvfrom: 10.1.13.2 (so-0/0/2.0
Page 577 and 578:
The discussion of Layer 3 VPNs invo
Page 579 and 580:
VPN, and routes announced by a remo
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The third and final step is to conf
Page 583 and 584:
One last protocol that you need to
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All routes that are part of the VPN
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--- 192.168.13.1 ping statistics --
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1 *[MPLS/0] 1d 18:03:41, metric 1 R
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65500:3:10.0.31.0/24 *[BGP/170] 00:
Page 593 and 594:
emains private. When configuring th
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} } peer-as 65500; neighbor 10.0.1.
Page 597 and 598: The VPN2 routing table also knows n
Page 599 and 600: Just to make sure that prefixes are
Page 601 and 602: Multicast senders and receivers are
Page 603 and 604: You administratively configure the
Page 605 and 606: 10.0.21.2/24 RouterB 192.168.12.1 R
Page 607 and 608: IGMP Last Member Query Interval: 1.
Page 609 and 610: Again, verify the configured group
Page 611 and 612: willing to be an RP send RP Announc
Page 613 and 614: JUNOS routers perform the encapsula
Page 615 and 616: Now check the RP status on the rout
Page 617 and 618: Also, make sure that the router’s
Page 619 and 620: Check to see which RPs the various
Page 621 and 622: The anycast PIM configuration is qu
Page 623 and 624: Solution Specify the group address
Page 625 and 626: The interfaces toward the multicast
Page 627 and 628: Discussion Flags: sparse Upstream i
Page 629 and 630: IGMP Query Response Interval: 10.0
Page 631 and 632: If you are not sure that the domain
Page 633 and 634: Discussion With PIM-SM, the RP in e
Page 635 and 636: The full RIB group configuration lo
Page 637 and 638: } address 192.168.19.1; # ping 224
Page 639 and 640: Upstream interface: local Upstream
Page 641 and 642: The first entry is for the source i
Page 643 and 644: IGMP Last Member Query Interval: 1.
Page 645: The command in this recipe is a sim
Page 650 and 651: BGP (Border Gateway Protocol) (cont
Page 652 and 653: configure command (continued) exclu
Page 654 and 655: dotted quad notation, 248 down arro
Page 656 and 657: firewall filters (continued) loggin
Page 658 and 659: IBGP (internal BGP) (continued) LOC
Page 660 and 661: IP multicast (continued) limiting g
Page 662 and 663: Level 1 systems (IS-IS) authenticat
Page 664 and 665: martian addresses/prefixes (continu
Page 666 and 667: O Object Identifier (see OID) OID (
Page 668 and 669: plain-text passwords (continued) JU
Page 670 and 671: RFC (Request for Comment) on BGP, 4
Page 672 and 673: outing tables (continued) checking
Page 674 and 675: set route-filter command, 296 set r
Page 676 and 677: show ospf interface command, 386, 3
Page 678 and 679: ssh command, 3, 89 SSM (Source-Spec
Page 680 and 681: tracing (trace logging) (continued)
Page 683: About the Author Aviva Garrett has
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