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Summary *10.0.0.1 192.168.17.1 0x80000002 289 0x2 0x5830 28 Summary *10.0.1.0 192.168.17.1 0x80000007 22 0x2 0xdeaf 28 Summary *10.0.2.0 192.168.17.1 0x80000002 289 0x2 0xd3bf 28 Summary *10.0.16.0 192.168.17.1 0x80000002 289 0x2 0xb1c7 28 Summary *192.168.13.1 192.168.17.1 0x80000002 289 0x2 0x9982 28 Summary *192.168.17.1 192.168.17.1 0x80000002 289 0x2 0x68fc 28 Summary *192.168.18.1 192.168.17.1 0x80000002 289 0x2 0xe939 28 Summary *192.168.19.1 192.168.17.1 0x80000002 289 0x2 0xde43 28 OSPF AS SCOPE link state database Type ID Adv Rtr Seq Age Opt Cksum Len Extern 0.0.0.0 192.168.15.1 0x80000001 590 0x2 0x67f1 36 Extern 172.19.121.0 192.168.15.1 0x80000001 590 0x2 0x859a 36 With the NSSA configured, these Type 5 routes are injected into the area as Type 7 (NSSA) LSAs: aviva@RouterJ> show ospf database area 0.0.0.3 OSPF link state database, area 0.0.0.3 Type ID Adv Rtr Seq Age Opt Cksum Len Router 192.168.15.1 192.168.15.1 0x80000002 29 0x0 0x6338 60 Router 192.168.16.1 192.168.16.1 0x80000004 2 0x0 0xe155 84 Router *192.168.17.1 192.168.17.1 0x80000003 1 0x0 0x6dc5 36 Network *10.0.8.1 192.168.17.1 0x80000001 1 0x0 0x6e69 32 Summary *10.0.0.0 192.168.17.1 0x80000001 55 0x0 0xa8e 28 Summary *10.0.0.1 192.168.17.1 0x80000001 55 0x0 0x7813 28 Summary *10.0.1.0 192.168.17.1 0x80000002 1 0x0 0x78e 28 Summary *10.0.2.0 192.168.17.1 0x80000001 55 0x0 0xf3a2 28 Summary *10.0.16.0 192.168.17.1 0x80000001 55 0x0 0xd1aa 28 Summary *192.168.13.1 192.168.17.1 0x80000001 55 0x0 0xb965 28 Summary *192.168.17.1 192.168.17.1 0x80000001 55 0x0 0x88df 28 Summary *192.168.18.1 192.168.17.1 0x80000001 55 0x0 0xa1c 28 Summary *192.168.19.1 192.168.17.1 0x80000001 55 0x0 0xfe26 28 NSSA 0.0.0.0 192.168.15.1 0x80000001 29 0x8 0xf2e4 36 NSSA 172.19.121.0 192.168.15.1 0x80000001 29 0x8 0x118d 36 OSPF AS SCOPE link state database Type ID Adv Rtr Seq Age Opt Cksum Len Extern 0.0.0.0 192.168.15.1 0x80000001 711 0x2 0x67f1 36 Extern 172.19.121.0 192.168.15.1 0x80000001 711 0x2 0x859a 36 The output shows that the Type 7 NSSAs still originate from the ASBR, RouterE (192.168.15.1). As with stub areas, you can configure the ABR in the NSSA to not flood Type 3 (Network Summary) LSAs to the routers in the stub area: [edit protocols ospf] aviva@RouterJ# set area 0.0.0.3 nssa no-summaries Looking at a router in Area 0.0.0.3, where before its link-state database would have contained Type 3 (Summary) LSAs: aviva@RouterE> show ospf database OSPF link state database, area 0.0.0.3 Type ID Adv Rtr Seq Age Opt Cksum Len Router *192.168.15.1 192.168.15.1 0x80000004 429 0x0 0x4167 60 400 | Chapter 12: OSPF This is the Title of the Book, eMatter Edition Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved.
Router 192.168.16.1 192.168.16.1 0x8000000b 7 0x0 0x94d3 72 Router 192.168.17.1 192.168.17.1 0x80000006 8 0x0 0xd8ca 48 Network 10.0.8.2 192.168.16.1 0x80000006 7 0x0 0xbd6 32 Summary 10.0.0.0 192.168.17.1 0x80000002 8 0x0 0x8552 28 Summary 10.0.1.0 192.168.17.1 0x80000002 8 0x0 0x8451 28 Summary 10.0.2.0 192.168.17.1 0x80000002 8 0x0 0x795b 28 Summary 192.168.18.1 192.168.17.1 0x80000001 17 0x0 0x91d3 28 NSSA *10.0.15.0 192.168.15.1 0x80000001 429 0x8 0xcaf3 36 NSSA *172.19.121.0 192.168.15.1 0x80000001 429 0x8 0x118d 36 NSSA *192.168.15.1 192.168.15.1 0x80000001 429 0x8 0x91cc 36 The Summary LSAs are no longer present: aviva@RouterE> show ospf database OSPF link state database, area 0.0.0.3 Type ID Adv Rtr Seq Age Opt Cksum Len Router *192.168.15.1 192.168.15.1 0x80000004 338 0x0 0x4167 60 Router 192.168.16.1 192.168.16.1 0x80000008 283 0x0 0x9ad0 72 Router 192.168.17.1 192.168.17.1 0x80000004 278 0x0 0xdcc8 48 Network 10.0.8.2 192.168.16.1 0x80000004 283 0x0 0xfd4 32 NSSA *10.0.15.0 192.168.15.1 0x80000001 338 0x8 0xcaf3 36 NSSA *172.19.121.0 192.168.15.1 0x80000001 338 0x8 0x118d 36 NSSA *192.168.15.1 192.168.15.1 0x80000001 338 0x8 0x91cc 36 12.8 Summarizing Routes in OSPF Problem You want to minimize the size of a backbone router’s link-state database by summarizing the routes sent to the backbone area. Solution Summarize the routes that are flooded into the backbone area by the ABR: [edit protocols ospf] aviva@RouterJ# set area 0.0.0.3 area-range 10.0.0.0/16 <strong>Discussion</strong> OSPF route summarization aggregates routes sent by nonbackbone areas to the backbone routers so that the size of their link-state databases is reduced. In this recipe, the networks in Area 0.0.0.3 are 10.0.8.1/28, 10.0.8.2/28, 10.0.13.1/28, and 10.0.13.2/28 (see Figure 12-3), which can be summarized as 10.0.0.0/24. If we check on one of the backbone routers before configuring route summarization, we see four Type 3 (Summary) LSAs in the link-state database: aviva@RouterG> show ospf database OSPF link state database, area 0.0.0.0 Type ID Adv Rtr Seq Age Opt Cksum Len Router 192.168.17.1 192.168.17.1 0x80000189 16 0x2 0x926e 60 This is the Title of the Book, eMatter Edition Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved. Summarizing Routes in OSPF | 401
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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
Page 373 and 374: Chapter 11 CHAPTER 11 IS-IS11 11.0
Page 375 and 376: oundary. This means that the IS-IS
Page 377 and 378: might be useful when migrating two
Page 379 and 380: Interface System L State Hold (secs
Page 381 and 382: RouterA.02-00 0x59 0xeda9 632 L1 L2
Page 383 and 384: The next four lines show the IP pre
Page 385 and 386: configuring the preference statemen
Page 387 and 388: 11.5 Configuring a Level 1-Only Rou
Page 389 and 390: 11.6 Controlling DIS Election Probl
Page 391 and 392: key, or password, for each interfac
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Page 397 and 398: RouterA Level 2 RouterB Level 2 Rou
Page 399 and 400: Increasing the IS-IS cost of Router
Page 401 and 402: 11.12 Moving IS-IS Traffic off a Ro
Page 403 and 404: 11.14 Tracing IS-IS Protocol Traffi
Page 405 and 406: Using some of the other flags, you
Page 407 and 408: OSPF views routers as nodes, which
Page 409 and 410: Area 0.0.0.0 RouterG lo0:192.168.19
Page 411 and 412: Another common problem in establish
Page 413 and 414: The route entries starting with [OS
Page 415 and 416: entries that originated from the lo
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Page 419 and 420: Checking on RouterA at the other en
Page 421 and 422: 192.168.19.1/32 *[Direct/0] 3d 01:5
Page 423: The routers in the stub area no lon
Page 427 and 428: Solution You configure MD5 authenti
Page 429 and 430: Use the show ospf interface detail
Page 431 and 432: With the default metric, traffic fr
Page 433 and 434: 12.12 Improving OSPF Convergence Ti
Page 435 and 436: This output shows two BFD sessions
Page 437 and 438: aviva@RouterG# commit aviva@RouterG
Page 439 and 440: Jun 14 22:00:26 CHANGE 192.168.17.1
Page 441 and 442: Jun 13 16:55:20 IP Route added with
Page 443 and 444: list of ASs to see whether a route
Page 445 and 446: E Route was originally learned from
Page 447 and 448: Then configure an EBGP session to t
Page 449 and 450: NLRI for this session: inet-unicast
Page 451 and 452: Next is information about routes le
Page 453 and 454: Looking at the remote peer router,
Page 455 and 456: * 10.0.31.0/24 Self I * 172.19.121.
Page 457 and 458: aviva@RouterE> show bgp summary Gro
Page 459 and 460: to 10.0.31.1 via t1-0/0/3.0 10.0.29
Page 461 and 462: lem with BGP itself. When the TCP s
Page 463 and 464: 13.4 Adjusting the Next-Hop Attribu
Page 465 and 466: The first configuration in this rec
Page 467 and 468: 13.7 Prepending AS Numbers to the A
Page 469 and 470: 13.8 Filtering BGP Routes Based on
Page 471 and 472: Translated, this match looks for fo
Page 473 and 474: 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
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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
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Layer 2 header MPLS header Layer 3
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RouterG 192.168.19.1 Ingress router
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The main difference between LDP and
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family to the t1-4/0/0 interface; o
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Also verify the MPLS-enabled interf
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The first line of the output shows
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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
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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)
Page 557 and 558:
The RSVP interface status shows tha
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14.13 Automatically Allocating Band
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Then examine the history of the LSP
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To understand how preemption works,
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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
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The discussion of Layer 3 VPNs invo
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VPN, and routes announced by a remo
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The third and final step is to conf
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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 --
Page 589 and 590:
1 *[MPLS/0] 1d 18:03:41, metric 1 R
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65500:3:10.0.31.0/24 *[BGP/170] 00:
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emains private. When configuring th
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} } peer-as 65500; neighbor 10.0.1.
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The VPN2 routing table also knows n
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Just to make sure that prefixes are
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Multicast senders and receivers are
Page 603 and 604:
You administratively configure the
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10.0.21.2/24 RouterB 192.168.12.1 R
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IGMP Last Member Query Interval: 1.
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Again, verify the configured group
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willing to be an RP send RP Announc
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JUNOS routers perform the encapsula
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Now check the RP status on the rout
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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
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Solution Specify the group address
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The interfaces toward the multicast
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Discussion Flags: sparse Upstream i
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IGMP Query Response Interval: 10.0
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If you are not sure that the domain
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Discussion With PIM-SM, the RP in e
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The full RIB group configuration lo
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} address 192.168.19.1; # ping 224
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Upstream interface: local Upstream
Page 641 and 642:
The first entry is for the source i
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IGMP Last Member Query Interval: 1.
Page 645:
The command in this recipe is a sim
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adjacencies (continued) IGPs and, 1
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BGP (Border Gateway Protocol) (cont
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configure command (continued) exclu
Page 654 and 655:
dotted quad notation, 248 down arro
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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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