Workaround: None. This issue has been observed when the DNS did not resolve localhost to the loopback address in an IPv6 environment. Reviewing your network configuration may assist in resolving this issue.
Explanation: After all LSRs have been satisfied for a given router, the adjacent routers are considered synchronized and in a full state. Updates (LSUs) are sent to neighbors only under the following conditions:when a network topology change is detected (incremental updates)every 30 minutes15. What will an OSPF router prefer to use first as a router ID?a loopback interface that is configured with the highest IP address on the routerany IP address that is configured using the router-id commandthe highest active interface IP that is configured on the routerthe highest active interface that participates in the routing process because of a specifically configured network statementExplanation: The first preference for an OSPF router ID is an explicitly configured 32-bit address. This address is not included in the routing table and is not defined by the network command. If a router ID that is configured through the router-id command is not available, OSPF routers next use the highest IP address available on a loopback interface, as loopbacks used as router IDs are also not routable addresses. Lacking either of these alternatives, an OSPF router will use the highest IP address from its active physical interfaces.16. What are the two purposes of an OSPF router ID? (Choose two.)
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Explanation: OSPF router ID does not contribute to SPF algorithm calculations, nor does it facilitate the transition of the OSPF neighbor state to Full. Although the router ID is contained within OSPF messages when router adjacencies are being established, it has no bearing on the actual convergence process.17. Refer to the exhibit. If no router ID was manually configured, what would router Branch1 use as its OSPF router ID?10.0.0.110.1.0.1192.168.1.100209.165.201.1Explanation: In OSPFv2, a Cisco router uses a three-tier method to derive its router ID. The first choice is the manually configured router ID with the router-id command. If the router ID is not manually configured, the router will choose the highest IPv4 address of the configured loopback interfaces. Finally if no loopback interfaces are configured, the router chooses the highest active IPv4 address of its physical interfaces.18. A network technician issues the following commands when configuring a router:
R3 will be elected BDR.The R4 FastEthernet 0/0 priority is 128.The R4 router ID is 172.16.1.1.R1 will be elected BDR.The router ID on R2 is the loopback interface.R2 will be elected DR.Explanation: R2 will be elected DR because it has the highest priority of 255, all of the others have a priority of 1. R3 will be elected BDR because it has the numerically highest router-ID of 192.168.1.4. The R4 router-ID is 172.16.1.1 because it is the IPv4 address attached to the loopback 0 interface.21. Refer to the exhibit. If the switch reboots and all routers have to re-establish OSPF adjacencies, which routers will become the new DR and BDR?Router R4 will become the DR and router R1 will become the BDR.Router R2 will become the DR and router R3 will become the BDR.Router R1 will become the DR and router R2 will become the BDR.Router R4 will become the DR and router R3 will become the BDR.Explanation: OSPF elections of a DR are based on the following in order of precedence:
Interface Fa0/0 has not been activated for OSPFv2 on router R2.Interface Fa0/0 is configured as a passive-interface on router R2.Interface S0/0 is configured as a passive-interface on router R2.Interface s0/0 has not been activated for OSPFv2 on router R2.Explanation: If a LAN network is not advertised using OSPFv2, a remote network will not be reachable. The output displays a successful neighbor adjacency between router R1 and R2 on the interface S0/0 of both routers.29. What is the recommended Cisco best practice for configuring an OSPF-enabled router so that each router can be easily identified when troubleshooting routing issues?Configure a value using the router-id command.Use the highest active interface IP address that is configured on the router.Use a loopback interface configured with the highest IP address on the router.Use the highest IP address assigned to an active interface participating in the routing process.Explanation: A Cisco router is assigned a router ID to uniquely identify it. It can be automatically assigned and take the value of the highest configured IP address on any interface, the value of a specifically-configured loopback address, or the value assigned (which is in the exact form of an IP address) using the router-id command. Cisco recommends using the router-id command.30. Which step in the link-state routing process is described by a router running an algorithm to determine the best path to each destination?
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Software Components and PackagesAbbreviationFCS VersionMP2 VersionMP3/MP4 Version3D Athena Widget Set for X11xaw3d1.5E1.5E1.5EApache Portable Runtime Utility Libraryaprutiln/an/a1.2.8Apache Portable Runtimeaprn/an/a1.2.9Accessibility Toolkitatk1.8.01.10.31.10.3bzip2 compression library and utilitiesbzip21.0.31.0.31.0.3Cairo Graphics Librarycairon/a1.0.21.4.10compface Image Manipulation Librarycompface1.0.01.0.01.5.2cURL URL Librarycurl7.13.27.15.17.16.4Berkeley-DB Database Librarybdb4.3.274.3.284.6.18Expat XML Parserexpat1.95.81.95.82.0.1Expect TCL Extensionexpect5.425.435.43FontConfigfontcfg2.2.22.2.22.4.2FreeType Font Engine Version 1freetype11.3.11.3.11.3.1FreeType Font Enginefreetype22.1.92.1.102.3.5GD Graphics Librarygd11.8.41.8.41.8.4GD Graphics Librarygd22.0.332.0.332.0.35GNU dbm Librarygdbm1.8.01.8.01.8.0Gnome DOM Librarygdome20.8.10.8.10.8.1GNU gettextgettext0.14.10.14.50.16.1GIF Image Manipulation Librarygiflib4.1.04.1.04.1.4GIMP Portability Libraryglib11.2.101.2.101.2.10GIMP Portability Libraryglib22.4.82.8.42.12.13GNU Privacy Guard (gnupg)gnupg1.4.01.4.01.4.7GIMP Toolkitgtk11.2.101.2.101.2.10GIMP Toolkitgtk22.4.142.8.92.10.14GWXLIBS Base Support Toolsgwxlibs2.0.02.1.03.0.0International Components for Unicode (ICU)icu3.23.43.6Enlightenment Imaging Libraryimlib1.10.01.10.01.9.15JASper JPEG2000 libraryjasper1.701.01.701.01.900.1ISO/IEC 11544:1993 JBIG kitjbig1.61.61.6IJG JPEG libraryjpeg6b6b6bJavaScript Embedded C Libraryjs1.5rc51.5rc51.5Little Color Management System (LCMS)lcms1.141.151.16Gnome IDL LibrarylibIDL0.850.8.60.8.8Gnome ART librarylibart2.3.172.3.172.3.19Gnome CSS2 Parsing Toolkit (libcroco)libcroco0.6.00.6.00.6.1Gnome EXIF Widget for GTKexifgtk0.3.50.3.50.3.5EXIF Processing Librarylibexif0.6.100.6.120.6.16GNU Cryptographic Librarylibgcrypt1.2.11.2.21.2.4Gnome HTTP Client Librarylibghttp1.0.91.0.91.0.9GNU Privacy Guard Error Librarylibgpg-err1.0.01.0.01.5Gnome Structured File Librarylibgsf1.11.11.13.31.14.5Gnome HTML Widget for GTKgtkhtml2.6.32.11.02.11.0Multi-image Network Graphics (MNG) Librarylibmng1.0.91.0.91.0.10Portable Network Graphics (PNG) Librarylibpng1.2.81.2.81.2.18Gnome SVG Rendering Librarylibrsvg2.9.52.13.32.18.0WMF Conversion Librarylibwmfn/a0.2.8.40.2.8.4W3C Consortium Library (libwww)libwww5.405.405.40libxml2 XML C Parser and Toolkitlibxml22.6.192.6.222.6.29libxslt XSLT C Parser and Toolkitlibxslt1.1.141.1.151.1.21Libtool Dynamic Loadingltdl1.5.221.5.221.5.22MD5 Hash Librarymd51.0.01.0.01.0.0mktempmktemp1.51.51.5OSSP mm Shared Memory Allocation Librarymm1.3.11.4.01.4.2MPEG Encoder/Decoder Librarympeglib1.2.11.2.11.3.1Portable Bitmap Utilities and Librariesnetpbm10.26.110.26.1410.34OpenLDAPopenldap2.2.242.2.302.3.37OpenSLP (Service Location Protocol)openslp1.2.11.2.11.2.1OpenSSLopenssl0.9.7g0.9.7i/0.9.6m0.9.7m/0.9.8e*Pango Layout and Text Rendering Librarypango1.4.11.10.21.17.3Perl Compatible Regular Expressionspcre5.06.47.2pkg-configpkgconfigpre 0.190.190.22Gnome Option Processing Librarypopt1.71.71.10.4True Random Libraryrand1.0.01.0.01.0.0GNU readlinereadline5.05.15.2Sablotron XML, DOM and XPath Processorsablot1.0.11.0.21.0.3Cyrus SASLsasl2.1.202.1.20**2.1.22S-lang Interpreter and Libraryslang1.4.91.4.91.4.9Tcl 8.4tcl848.4.98.4.108.4.15Extended Tcltclx848.3.58.3.58.4TIFF library and utilitiestiff3.7.23.7.43.8.2Tk 8.4tk848.4.98.4.108.4.14trio printf librarytrio1.101.101.12Xalan XSLT Processorxalan1.9.01.10.01.10.0Xerces Validating XML C++ Parserxerces2.6.02.7.02.7.0XML Security Libraryxmlsec11.2.81.2.91.2.10X.org FontsXORGFonts6.8.26.9.07.2.0X.org RuntimeXORGRT6.8.26.9.07.2.0zlib compression libraryzlib1.2.21.2.31.2.3*For OpenServer 6.0.0 MP3,OpenSSL 0.9.8e has been added;OpenSSL 0.9.7 is upgraded from 0.9.7i to 0.9.7m;and OpenSSL 0.9.6m is deprecated and no longer provided.**With respect to Cyrus-SASL:the version did not change in OpenServer 6.0.0 MP2 but the way it was compiledsignificantly changed.In previous (prior to OpenServer 6.0.0 MP2) releases all of the backendswere static.All the backends are now dynamic. 2ff7e9595c
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