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3.1 Configuring IPSec Problem You need a secure method of sending information between sites. Solution Start by defining the IPSec SA between your two intranet sites. On each security router, define identical SAs: [edit security ipsec] aviva@router1# edit security-association site1-site2 [edit security ipsec security-association site1-site2] aviva@router1# set description "SA from site1 to site2" aviva@router1# set mode tunnel aviva@router1# set manual direction bidirectional protocol bundle aviva@router1# set manual direction bidirectional spi 400 aviva@router1# set manual direction bidirectional auxiliary-spi 400 aviva@router1# set manual direction bidirectional authentication algorithm hmac-sha1- 96 aviva@router1# set manual direction bidirectional authentication key ascii-text $1991poPPi aviva@router1# set manual direction bidirectional encryption algorithm des-cbc aviva@router1# set manual direction bidirectional encryption key ascii-text $1991poPPi Configuring a firewall filter accepts all traffic returning from the remote site: [edit firewall filter traffic-out-of-ipsec-tunnel] aviva@router1# set term out-of-ipsec-tunnel from source-address 10.0.97.0/24 aviva@router1# set term out-of-ipsec-tunnel from destination-address 10.0.12.0/24 aviva@router1# set term out-of-ipsec-tunnel then accept Finally, apply the second filter on the ES interface that goes from the local security gateway to the remote security gateway: [edit interfaces es-3/0/0] aviva@router1# set unit 0 tunnel source 10.0.12.33 aviva@router1# set unit 0 tunnel destination 10.0.97.62 aviva@router1# set unit 0 family inet ipsec-sa site1-site2 aviva@router1# set unit 0 family inet filter input traffic-out-of-ipsec-tunnel <strong>Discussion</strong> This recipe shows how to set up IPSec for M-series and T-series routers that have ES PICs. The setup process is fairly involved. There are three basic components to the configuration: defining the SA and the tunnel to carry the secured traffic, creating firewall filters to place traffic going from one site to the other into the tunnel, and configuring the interfaces to apply the filters and create the tunnel on the ES PIC. This recipe shows how to set up a manual SA, in which you specify all SA parameters in the configuration. While setting up SAs manually can be manageable in small 108 | Chapter 3: IPSec This is the Title of the Book, eMatter Edition Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved.
networks, it does not scale well. As the network size increases, having IPSec dynamically configure SAs is a better option (see Recipe 3.2). The SA is bidirectional, so the same encryption and authentication keys are used on incoming and outgoing traffic through the IPSec tunnel. To use different keys in each direction, use the set direction inbound and set direction outbound commands. To start, define the SA. Because you have two routers acting as the security gateways between your two sites, you use tunnel mode. For the other SA parameters, this example chooses to use both the AH and ESP protocols (specified with the protocol bundle statement), HMAC-SHA1-96 authentication, DES-CBC encryption, and a SPI value of 400. The auxiliary SPI is needed because we are using both AH and ESP. Both security gateway routers must have the same SA configuration. Next, you create a firewall filter to accept traffic returning from the remote site and you apply it to the ES interface. You need to set up similar firewall filters on the remote security gateway router. Finally, you configure the router interfaces. On the ES interface facing the remote security gateway router, configure the tunnel on the logical unit, and for the IPv4 protocol family, associate the SA and apply the traffic-out-of-ipsec-tunnel filter. Set up the remote router in a similar fashion. Use the following command to verify that the SA is active: aviva@router1> show ipsec security-associations detail Security association: site1-site2, Interface family: Up Local gateway: 10.0.12.33, Remote gateway: 10.0.97.62 Local identity: ipv4_subnet(any:0,[0..7]=0.0.0.0/0) Remote identity: ipv4_subnet(any:0,[0..7]=0.0.0.0/0) Direction: inbound, SPI: 400, AUX-SPI: 400 Mode: tunnel, Type: manual, State: Installed Protocol: BUNDLE, Authentication: hmac-sha1-96, Encryption: des-cbc Anti-replay service: Disabled Direction: outbound, SPI: 400, AUX-SPI: 400 Mode: tunnel, Type: manual, State: Installed Protocol: BUNDLE, Authentication: hmac-sha1-96, Encryption: des-cbc Anti-replay service: Disabled The first line shows that the SA is active (Up), and you see that the inbound and outbound SAs are installed. This command also shows the configured SA parameters. You can check the status of the IPSec tunnel with the ping and traceroute commands. You should be able to ping a system at the remote site: aviva@router1> ping 10.0.97.2 PING 10.0.97.2 (10.0.97.2): 56 data bytes 64 bytes from 10.0.97.2: icmp_seq=0 ttl=253 time=0.939 ms 64 bytes from 10.0.97.2: icmp_seq=1 ttl=253 time=0.886 ms This is the Title of the Book, eMatter Edition Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved. Configuring IPSec | 109
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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
Page 81 and 82: Some of the main processes are MGD,
Page 83 and 84: switching board (the SSB), and two
Page 85 and 86: 1.28 Gathering Information Before C
Page 87 and 88: The apply-groups statement causes t
Page 89 and 90: } } } address 10.0.16.1/24; Finally
Page 91 and 92: The commit synchronize command comm
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Page 95 and 96: At this point, you can also upgrade
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Page 99 and 100: client/server systems—the RADIUS
Page 101 and 102: You need to enable FTP only if you
Page 103 and 104: use of the root account. Logging in
Page 105 and 106: A slight twist to this recipe is to
Page 107 and 108: Also, you will not be able to commi
Page 109 and 110: Solution Set all plain-text passwor
Page 111 and 112: Discussion When you want users to b
Page 113 and 114: individual user accounts with passw
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Page 117 and 118: If you try to enter a command that
Page 119 and 120: aviva@router1# set class operator-p
Page 121 and 122: If you use a centralized server, it
Page 123 and 124: aviva@RouterF# set term ssh-telnet
Page 125 and 126: statement in the configuration, whi
Page 127 and 128: een idle, and what they are doing.
Page 129 and 130: Mike would be logged out: mike@rout
Page 131: Encryption, which is the encoding o
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Page 137 and 138: have to set up an IKE SA and a fire
Page 139 and 140: Here’s what the relevant portions
Page 141 and 142: Finally, configure the domain’s I
Page 143 and 144: Configure the security gateway rout
Page 145 and 146: [edit protocols ospf area 0.0.0.0]
Page 147 and 148: Then, configure the IPSec tunnel to
Page 149 and 150: Issuer: Organization: mycompany, Co
Page 151 and 152: Alternate subject: RouterB.mycompan
Page 153 and 154: Chapter 4 CHAPTER 4 SNMP4 4.0 Intro
Page 155 and 156: juniperMIB, which is the top node o
Page 157 and 158: Juniper Networks provides several d
Page 159 and 160: 4.2 Setting Router Information for
Page 161 and 162: Table 4-1. SNMP trap categories Key
Page 163 and 164: Solution You can add a term to the
Page 165 and 166: You might want to give access to al
Page 167 and 168: aviva@router1> show snmp mib get "j
Page 169 and 170: 4.9 Collecting Router Operational I
Page 171 and 172: CPU utilization: User 0 percent Bac
Page 173 and 174: Table 4-2. System logging severity
Page 175 and 176: Discussion RMON is an SNMP specific
Page 177 and 178: See Also RFC 2819, Remote Network M
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Page 181 and 182: 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
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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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