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If the same authentication type and password are not configured across the area, IS-IS cannot establish adjacencies and you will see errors. Here, Level 2 authentication is configured on RouterH but not on RouterG: aviva@RouterH> show isis adjacency extensive RouterG Interface: fe-0/0/1.0, Level: 2, State: Down, Expires in 0 secs Priority: 64, Up/Down transitions: 2, Last transition: 00:00:37 ago Circuit type: 3, Speaks: IP, IPv6, MAC address: 0:5:85:c2:2e:d1 Topologies: Unicast Restart capable: Yes LAN id: RouterH.02, IP addresses: 10.0.1.2 Transition log: When State Event Down reason Tue Jun 21 19:51:33 Up Seenself Tue Jun 21 23:51:01 Down Error Bad Hello RouterA Interface: fe-1/0/1.0, Level: 1, State: Up, Expires in 7 secs Priority: 64, Up/Down transitions: 1, Last transition: 21:37:54 ago Circuit type: 1, Speaks: IP, IPv6, MAC address: 0:5:85:ca:e7:d0 Topologies: Unicast Restart capable: Yes LAN id: RouterA.02, IP addresses: 10.0.24.2 Transition log: When State Event Down reason Tue Jun 21 02:13:44 Up Seenself For tighter security, you can also define separate authentication passwords for the IS-IS Hello packet exchanges on interfaces. The following commands set the hello password on interface fe-0/0/1: [edit protocols isis interface fe-0/0/1.0] aviva@RouterG# set level 2 hello-authentication-type md5 aviva@RouterG# set level 2 hello-authentication-key $NutherPaSSwd 11.8 Redistributing Static Routes into IS-IS Problem You have a single, low-speed link to a small customer and instead, of having the customer run IS-IS (or even RIP), you want to set up a static route to the customer. Solution Create a routing policy to redistribute static routes into IS-IS: [edit policy-options] aviva@RouterG# set policy-statement export-statics term 1 from protocol static aviva@RouterG# set policy-statement export-statics term 1 then accept aviva@RouterG# show policy-statement export-statics { term 1 { 368 | Chapter 11: IS-IS This is the Title of the Book, eMatter Edition Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved.
} } from protocol static; then accept; Then apply the policy to IS-IS: [edit protocols isis] aviva@RouterG# set export export-statics <strong>Discussion</strong> Routing policy is normally applied to BGP to filter the entries in the routing table rather than to IS-IS or another IGP. This is because the main purpose of an IGP is to determine the best route to a destination. However, occasionally you need to use routing policies with an IGP, generally to redistribute routes into that IGP from another protocol. For example, this might be done for a small customer who doesn’t need to run a dynamic routing protocol, such as IS-IS, but just connect to you using a static route. You create a routing policy to redistribute these customer’s routes into your IS-IS network. This recipe creates a simple routing policy to do this, accepting all static routes. For the policy to take effect, you must apply it to IS-IS. RouterG has one configured static route: aviva@RouterG> show route protocol static table inet.0 inet.0: 12 destinations, 12 routes (12 active, 0 holddown, 0 hidden) + = Active Route, - = Last Active, * = Both 192.168.12.1/32 *[Static/5] 00:10:41 > to 10.0.16.1 via fe-1/0/0.0 When the static route is redistributed into IS-IS, it is incorporated into the IS-IS linkstate database and is marked as being an external prefix: aviva@RouterG> show isis database extensive IS-IS level 1 link-state database: RouterG.00-00 Sequence: 0xe5, Checksum: 0x912c, Lifetime: 492 secs IP prefix: 10.0.1.0/24 Metric: 10 Internal Up IP prefix: 10.0.16.0/24 Metric: 10 Internal Up IP prefix: 192.168.12.1/32 Metric: 0 External Up IP prefix: 192.168.19.1/32 Metric: 0 Internal Up Header: LSP ID: RouterG.00-00, Length: 175 bytes Allocated length: 1492 bytes, Router ID: 192.168.19.1 Remaining lifetime: 492 secs, Level: 1,Interface: 0 Estimated free bytes: 1317, Actual free bytes: 1317 Aging timer expires in: 492 secs Protocols: IP, IPv6 Packet: LSP ID: RouterG.00-00, Length: 175 bytes, Lifetime : 1200 secs Checksum: 0x912c, Sequence: 0xe5, Attributes: 0xb NLPID: 0x83, Fixed length: 27 bytes, Version: 1, Sysid length: 0 bytes Packet type: 18, Packet version: 1, Max area: 0 TLVs: Area address: 49.0020 (3) Speaks: IP Speaks: IPv6 Redistributing Static Routes into IS-IS | 369 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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Page 351 and 352: 9.16 Rate-Limiting Traffic Flow to
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Page 357 and 358: By default, the JUNOS software impl
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Page 363 and 364: The routing policy you set up is a
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Page 369 and 370: 10.6 Sending Version 1 Update Messa
Page 371 and 372: Mar 31 10:11:13 Group beta-rip-grou
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Page 375 and 376: oundary. This means that the IS-IS
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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
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Page 387 and 388: 11.5 Configuring a Level 1-Only Rou
Page 389 and 390: 11.6 Controlling DIS Election Probl
Page 391: 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
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Page 419 and 420: Checking on RouterA at the other en
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Page 423 and 424: The routers in the stub area no lon
Page 425 and 426: Router 192.168.16.1 192.168.16.1 0x
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
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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
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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
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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-
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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
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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
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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 --
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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:
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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
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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
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Check to see which RPs the various
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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
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The first entry is for the source i
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IGMP Last Member Query Interval: 1.
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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
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dotted quad notation, 248 down arro
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firewall filters (continued) loggin
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IBGP (internal BGP) (continued) LOC
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IP multicast (continued) limiting g
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Level 1 systems (IS-IS) authenticat
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martian addresses/prefixes (continu
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O Object Identifier (see OID) OID (
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plain-text passwords (continued) JU
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RFC (Request for Comment) on BGP, 4
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outing tables (continued) checking
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set route-filter command, 296 set r
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show ospf interface command, 386, 3
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ssh command, 3, 89 SSM (Source-Spec
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tracing (trace logging) (continued)
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About the Author Aviva Garrett has
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