{"id":225,"date":"2020-04-01T10:13:31","date_gmt":"2020-04-01T02:13:31","guid":{"rendered":"https:\/\/cciedump.spoto.net\/blog\/?p=225"},"modified":"2024-11-06T11:07:06","modified_gmt":"2024-11-06T03:07:06","slug":"how-to-config-bgp-route-reflector-attributes-peer-groups","status":"publish","type":"post","link":"https:\/\/cciedump.spoto.net\/blog\/how-to-config-bgp-route-reflector-attributes-peer-groups_225.html","title":{"rendered":"How to Config BGP Route Reflector\/Attributes\/Peer-groups"},"content":{"rendered":"\n<p><strong>This is the best <\/strong><strong>labs<\/strong><strong>&nbsp;to learn BGP<\/strong><\/p>\n\n\n\n<p>Autonomous system AS, AS refers to a series of routers under unified technical management. For example, a network running OSPF or a network running ISIS can be used as an AS. EGP runs at the borders of ASs to exchange routing information between ASs. With EGP, each AS can independently select its own suitable IGP protocol and obtain routing information of other ASs through EGP. BGP is an inter-domain routing protocol that provides loop-free routing between autonomous systems.<\/p>\n\n\n\n<p>If you want to know more info about BGP configuration and better Pass the lab exam, contact us for 100% real exam study materials and professional help!<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><a href=\"https:\/\/tb.53kf.com\/code\/client\/10172212\/1?custom_channel=chenjia\" target=\"_blank\" rel=\"follow no noopener\"><img loading=\"lazy\" class=\"alignnone wp-image-1817\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/08\/contact-us-button-png-1-1-1024x388.png\" alt=\"contact us\" width=\"360\" height=\"136\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/08\/contact-us-button-png-1-1-1024x388.png 1024w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/08\/contact-us-button-png-1-1-300x114.png 300w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/08\/contact-us-button-png-1-1-768x291.png 768w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/08\/contact-us-button-png-1-1.png 1740w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><\/a><\/figure>\n\n\n\n<p><strong>This is the best <\/strong><strong>labs<\/strong><strong>&nbsp;to learn BGP<\/strong><\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_17 counter-hierarchy counter-decimal ez-toc-light-blue\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/cciedump.spoto.net\/blog\/how-to-config-bgp-route-reflector-attributes-peer-groups_225.html\/#Experimental_topology\" title=\"Experimental topology\">Experimental topology<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/cciedump.spoto.net\/blog\/how-to-config-bgp-route-reflector-attributes-peer-groups_225.html\/#IP_address_planning\" title=\"IP address planning\">IP address planning<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/cciedump.spoto.net\/blog\/how-to-config-bgp-route-reflector-attributes-peer-groups_225.html\/#Experimental_requirements\" title=\"Experimental requirements\">Experimental requirements<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/cciedump.spoto.net\/blog\/how-to-config-bgp-route-reflector-attributes-peer-groups_225.html\/#Case_configuration_ideas_and_test_results%E2%80%A2\" title=\"Case configuration ideas and test results\u2022 \">Case configuration ideas and test results\u2022 <\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/cciedump.spoto.net\/blog\/how-to-config-bgp-route-reflector-attributes-peer-groups_225.html\/#Configure_the_routing_protocol\" title=\"Configure the routing protocol:\">Configure the routing protocol:<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/cciedump.spoto.net\/blog\/how-to-config-bgp-route-reflector-attributes-peer-groups_225.html\/#Redistribution_routes\" title=\"Redistribution routes:\">Redistribution routes:<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/cciedump.spoto.net\/blog\/how-to-config-bgp-route-reflector-attributes-peer-groups_225.html\/#%E2%80%A2_BGP_part\" title=\"\u2022 BGP part:\">\u2022 BGP part:<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Experimental_topology\"><\/span><strong>Experimental topology<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" class=\"alignnone wp-image-226\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/01-783x1024.png\" alt=\"Experimental topology\" width=\"783\" height=\"1024\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/01-783x1024.png 783w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/01-229x300.png 229w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/01-768x1004.png 768w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/01.png 812w\" sizes=\"(max-width: 783px) 100vw, 783px\" \/><\/figure>\n\n\n\n<h2><span class=\"ez-toc-section\" id=\"IP_address_planning\"><\/span><strong>IP address planning<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>1. The IP address segment in the topology is: 172.8.AB.X \/ 24, where AB is a combination of two router numbers.<\/p>\n\n\n\n<p>2. For example: AB between R3-R5 is 35, and X is the router number, for example, X = 3 for R3<\/p>\n\n\n\n<p>3. All routers have a Loopback 0 interface, the address format is: X.X.X.X \/ 32, where X is the router number.<\/p>\n\n\n\n<p>4. The network segment between R1 \/ R4 \/ R6 is: 172.8.146.X \/ 24, where X is the router number.<\/p>\n\n\n\n<p>5. There are no special requirements, and static routes are not allowed.<\/p>\n\n\n\n<h2><span class=\"ez-toc-section\" id=\"Experimental_requirements\"><\/span><strong>Experimental requirements<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u2022 IGP section:<\/p>\n\n\n\n<p>1. Configure the OSPF area as shown in the figure. The RID is the Loopback 0 address. Area 146 should be configured as a special area of OSPF.<\/p>\n\n\n\n<p>2. Configure other routing protocols, and redistribute them so that routes can be injected into each other to achieve network-wide interworking.<\/p>\n\n\n\n<p>3. Configure policy routing for R1 so that the data flow from R2 to Area 57 via R1 goes to R6; the data flow from R2 to EIGRP 35 via R1 goes to R4.<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (Please use Traceroute for 3.3.3.3 and 5.5.5.5 in R2)<\/p>\n\n\n\n<p>4. Add the following network segments to EIGRP 35 on R3:<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Loopback17: 17.17.17.17\/32, Loopback101: 100.100.100.101\/32<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Loopback18: 18.18.18.18\/32, Loopback102: 100.100.100.102\/32<\/p>\n\n\n\n<p>a. Configure the loopback 18 network segment to be transmitted only within EIGRP 35, and other addresses require the entire network to ping through.<\/p>\n\n\n\n<p>b. Configure the most accurate route summary for Loopback 100 and Loopback 101, hide detailed routes, and summary routes are not allowed to appear in EIGRP 35.<\/p>\n\n\n\n<p>\u2022 <strong>BGP part:<\/strong><\/p>\n\n\n\n<p>1. Configure BGP according to the plan in red font as shown in the figure. The RID is the Loopback 0 address.<\/p>\n\n\n\n<p>2. Configure R1 of AS 146 as a route reflector and R4 \/ R6 as clients. Requires peer-group configuration.<\/p>\n\n\n\n<p>3. Add the following network segments to R2 and publish them to BGP:<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Loopback24: 192.168.24.1\/24 Loopback25: 192.168.25.1\/24 Loopback26: 192.168.26.1\/24<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Add the following network segment on R3, Loopback30: 30.30.30.30\/27, and publish it to BGP:<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Configure the R2 BGP table as follows:<\/p>\n\n\n\n<p>4. Modify the BGP routing attributes on the appropriate routers so that the path from R2 to 30.30.30.30\/27 is: R1-R6-R7-R5-R3.<\/p>\n\n\n\n<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; At this time, the BGP table of R2 remains unchanged as shown above, and the BGP routing of the R4 router is not changed.<\/p>\n\n\n\n<h2><span class=\"ez-toc-section\" id=\"Case_configuration_ideas_and_test_results%E2%80%A2\"><\/span><strong>Case configuration ideas and test results\u2022 <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>IGP section:<\/strong><\/p>\n\n\n\n<ul><li>1. Configure the OSPF area as shown in the figure. The RID is the Loopback 0 address. Area 146 should be configured as a special area of OSPF.<\/li><li>2. Configure other routing protocols, and redistribute them so that routes can be injected into each other to achieve network-wide interworking.<\/li><\/ul>\n\n\n\n<p><strong>Configure the interface:<\/strong><\/p>\n\n\n\n<p>R1:<\/p>\n\n\n\n<ul><li>interface Loopback0<\/li><li>ip address 1.1.1.1 255.255.255.255<\/li><li>no shutdown<\/li><li>interface Ethernet0\/0<\/li><li>ip address 172.8.12.1 255.255.255.0<\/li><li>no shutdown<\/li><li>interface Ethernet0\/1<\/li><li>ip address 172.8.146.1 255.255.255.0<\/li><li>no shutdown<\/li><\/ul>\n\n\n\n<ul><li>R2:<\/li><li>interface Loopback0<\/li><li>ip address 2.2.2.2 255.255.255.255<\/li><li>no shutdown<\/li><li>interface Ethernet0\/0<\/li><li>ip address 172.8.12.2 255.255.255.0<\/li><li>no shutdown<\/li><\/ul>\n\n\n\n<p>R3:<\/p>\n\n\n\n<ul><li>interface&nbsp;Loopback0<\/li><li>ip&nbsp;address&nbsp;3.3.3.3&nbsp;255.255.255.255<\/li><li>no shutdown<\/li><li>interface&nbsp;Ethernet0\/0<\/li><li>ip&nbsp;address&nbsp;172.8.35.3&nbsp;255.255.255.0<\/li><li>no shutdown<\/li><\/ul>\n\n\n\n<p>R4:<\/p>\n\n\n\n<ul><li>interface&nbsp;Loopback0<\/li><li>ip&nbsp;address&nbsp;4.4.4.4&nbsp;255.255.255.255<\/li><li>no shutdown<\/li><li>interface&nbsp;Ethernet0\/1<\/li><li>ip&nbsp;address&nbsp;172.8.146.4&nbsp;255.255.255.0<\/li><li>no shutdown<\/li><li>interface&nbsp;Ethernet0\/0<\/li><li>ip&nbsp;address&nbsp;172.8.47.4&nbsp;255.255.255.0<\/li><li>no shutdown<\/li><\/ul>\n\n\n\n<p>R5:<\/p>\n\n\n\n<ul><li>interface&nbsp;Loopback0<\/li><li>ip&nbsp;address&nbsp;5.5.5.5&nbsp;255.255.255.255<\/li><li>no shutdown<\/li><li>interface&nbsp;Ethernet0\/0<\/li><li>ip&nbsp;address&nbsp;172.8.35.5&nbsp;255.255.255.0<\/li><li>no shutdown<\/li><li>interface&nbsp;Ethernet0\/1<\/li><li>ip&nbsp;address&nbsp;172.8.57.5&nbsp;255.255.255.0<\/li><li>no shutdown<\/li><\/ul>\n\n\n\n<p>R6:<\/p>\n\n\n\n<ul><li>interface&nbsp;Loopback0<\/li><li>ip&nbsp;address&nbsp;6.6.6.6&nbsp;255.255.255.255<\/li><li>no shutdown<\/li><li>interface&nbsp;Ethernet0\/1<\/li><li>ip&nbsp;address&nbsp;172.8.146.6&nbsp;255.255.255.0<\/li><li>no shutdown<\/li><li>interface&nbsp;Ethernet0\/2<\/li><li>ip&nbsp;address&nbsp;172.8.67.6&nbsp;255.255.255.0<\/li><li>no shutdown<\/li><\/ul>\n\n\n\n<p>R7:<\/p>\n\n\n\n<ul><li>interface&nbsp;Loopback0<\/li><li>ip&nbsp;address&nbsp;7.7.7.7&nbsp;255.255.255.255<\/li><li>no shutdown<\/li><li>interface&nbsp;Ethernet0\/0<\/li><li>ip&nbsp;address&nbsp;172.8.47.7&nbsp;255.255.255.0<\/li><li>no shutdown<\/li><li>interface&nbsp;Ethernet0\/1<\/li><li>ip&nbsp;address&nbsp;172.8.57.7&nbsp;255.255.255.0<\/li><li>no shutdown<\/li><li>interface&nbsp;Ethernet0\/2<\/li><li>ip&nbsp;address&nbsp;172.8.67.7&nbsp;255.255.255.0<\/li><li>no shutdown<\/li><\/ul>\n\n\n\n<h2><span class=\"ez-toc-section\" id=\"Configure_the_routing_protocol\"><\/span><strong>Configure the routing protocol:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>R1:<\/p>\n\n\n\n<ul><li>router&nbsp;ospf 100<\/li><li>router-id&nbsp;1.1.1.1<\/li><li>network&nbsp;1.1.1.1&nbsp;0.0.0.0&nbsp;area&nbsp;146<\/li><li>network&nbsp;172.8.146.1&nbsp;0.0.0.0&nbsp;area&nbsp;146<\/li><li>area&nbsp;146&nbsp;nssa<\/li><li>router eigrp 12<\/li><li>network 172.8.12.1 0.0.0.0<\/li><\/ul>\n\n\n\n<p>R2:<\/p>\n\n\n\n<ul><li>router eigrp 12<\/li><li>network 2.2.2.2 0.0.0.0<\/li><li>network 172.8.12.2 0.0.0.0<\/li><\/ul>\n\n\n\n<p>R3:<\/p>\n\n\n\n<ul><li>router&nbsp;eigrp 35<\/li><li>network&nbsp;3.3.3.3&nbsp;0.0.0.0<\/li><li>network&nbsp;172.8.35.3&nbsp;0.0.0.0<\/li><\/ul>\n\n\n\n<p>R4:<\/p>\n\n\n\n<ul><li>router&nbsp;ospf 100<\/li><li>router-id&nbsp;4.4.4.4<\/li><li>network&nbsp;4.4.4.4&nbsp;0.0.0.0&nbsp;area&nbsp;0<\/li><li>network&nbsp;172.8.47.4&nbsp;0.0.0.0&nbsp;area&nbsp;0<\/li><li>network&nbsp;172.8.146.4&nbsp;0.0.0.0&nbsp;area&nbsp;146<\/li><li>area 146 nssa default-information-originate <strong>\/\/ Configure as NSSA and manually delegate the default route<\/strong><\/li><\/ul>\n\n\n\n<p><strong>or<\/strong>area 146 nssa no-summary&nbsp; <strong>\/\/ Configured as Totally NSSA will automatically delegate the default route<\/strong><\/p>\n\n\n\n<p>R5:<\/p>\n\n\n\n<ul><li>router&nbsp;ospf 100<\/li><li>router-id&nbsp;5.5.5.5<\/li><li>network&nbsp;5.5.5.5&nbsp;0.0.0.0&nbsp;area&nbsp;57<\/li><li>network&nbsp;172.8.57.5&nbsp;0.0.0.0&nbsp;area&nbsp;57<\/li><li>router&nbsp;eigrp 35<\/li><li>network&nbsp;172.8.35.5&nbsp;0.0.0.0<\/li><\/ul>\n\n\n\n<p>R6:<\/p>\n\n\n\n<ul><li>router&nbsp;ospf 100<\/li><li>router-id&nbsp;6.6.6.6<\/li><li>network&nbsp;6.6.6.6&nbsp;0.0.0.0&nbsp;area&nbsp;0<\/li><li>network&nbsp;172.8.67.6&nbsp;0.0.0.0&nbsp;area&nbsp;0<\/li><li>network&nbsp;172.8.146.6&nbsp;0.0.0.0&nbsp;area&nbsp;146<\/li><li>area 146 nssa default-information-originate<strong>&nbsp;\/\/ Configure as NSSA and manually delegate the default route<\/strong><\/li><li><strong>or<\/strong><\/li><li>area 146 nssa no-summary&nbsp; <strong>\/\/ Configured as Totally NSSA will automatically delegate the default route<\/strong><\/li><\/ul>\n\n\n\n<p>R7:<\/p>\n\n\n\n<ul><li>router&nbsp;ospf 100<\/li><li>router-id&nbsp;7.7.7.7<\/li><li>network&nbsp;7.7.7.7&nbsp;0.0.0.0&nbsp;area&nbsp;0<\/li><li>network&nbsp;172.8.47.7&nbsp;0.0.0.0&nbsp;area&nbsp;0<\/li><li>network&nbsp;172.8.57.7&nbsp;0.0.0.0&nbsp;area&nbsp;57<\/li><li>network&nbsp;172.8.67.7&nbsp;0.0.0.0&nbsp;area&nbsp;0<\/li><\/ul>\n\n\n\n<h2><span class=\"ez-toc-section\" id=\"Redistribution_routes\"><\/span><strong>Redistribution routes:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>R1:<\/p>\n\n\n\n<ul><li>router&nbsp;eigrp 12<\/li><li>redistribute&nbsp;ospf 100 metric 10000 100 255 1 1500<\/li><li>router&nbsp;ospf 100<\/li><li>redistribute&nbsp;eigrp 12 subnets<\/li><\/ul>\n\n\n\n<p>R5:<\/p>\n\n\n\n<ul><li>router&nbsp;eigrp 35<\/li><li>redistribute&nbsp;ospf 100 metric&nbsp;10000&nbsp;100&nbsp;255&nbsp;1&nbsp;1500<\/li><li>router&nbsp;ospf 100<\/li><li>redistribute&nbsp;eigrp 35 subnets<\/li><\/ul>\n\n\n\n<p><strong>Note:<\/strong><\/p>\n\n\n\n<p>If Area 146 uses Totally NSSA, R1 cannot learn the fine route of Loopback 0 address of R4 and R6, but it can be reached by default route, so R1, R4, and R6 can establish iBGP neighbors (provided that R4 and R6 can learn the loopback of R1 0 address fine routing). If both are accessed through the default route, a neighbor cannot be established. Or you can notify Loopback 0 of R4 and R6 into Area 146.<\/p>\n\n\n\n<p>If Area 146 adopts NSSA but does not manually decentralize the default route, it will cause R2 to fail to learn the default route through redistribution, which will affect the realization of other requirements.<\/p>\n\n\n\n<p><strong>3. Configure policy routing for R1 so that the data flow from R2 to Area 57 via R1 goes to R6; the data flow from R2 to EIGRP 35 via R1 goes to R4.<\/strong><\/p>\n\n\n\n<p><strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (Please use Traceroute for 5.5.5.5 and 3.3.3.3 in R2)<\/strong><\/p>\n\n\n\n<p>R1:<\/p>\n\n\n\n<ul><li>access-list&nbsp;100&nbsp;permit&nbsp;ip&nbsp;any&nbsp;host&nbsp;5.5.5.5<\/li><li>access-list&nbsp;100&nbsp;permit&nbsp;ip&nbsp;any&nbsp;172.8.57.0&nbsp;0.0.0.255<\/li><li>access-list&nbsp;101&nbsp;permit&nbsp;ip&nbsp;any&nbsp;host&nbsp;3.3.3.3<\/li><li>access-list&nbsp;101&nbsp;permit&nbsp;ip&nbsp;any&nbsp;172.8.35.0&nbsp;0.0.0.255<\/li><li>route-map PBR permit&nbsp;10<\/li><li>match&nbsp;ip&nbsp;address&nbsp;100<\/li><li>set&nbsp;ip&nbsp;next-hop&nbsp;172.8.146.6<\/li><li>route-map&nbsp;PBR&nbsp;permit&nbsp;20<\/li><li>match&nbsp;ip&nbsp;address&nbsp;101<\/li><li>set&nbsp;ip&nbsp;next-hop&nbsp;172.8.146.4<\/li><li>route-map&nbsp;PBR&nbsp;permit&nbsp;30<\/li><li>interface&nbsp;Ethernet0\/0<\/li><li>ip&nbsp;policy&nbsp;route-map&nbsp;PBR<\/li><li>verification:<\/li><\/ul>\n\n\n\n<p>R2#traceroute 5.5.5.5<\/p>\n\n\n\n<ul><li>Type escape sequence to abort.<\/li><li>Tracing the route to 5.5.5.5<\/li><li>VRF info: (vrf in name\/id, vrf out name\/id)<\/li><li>&nbsp;1 172.8.12.1 0 msec 0 msec 0 msec<\/li><li>&nbsp;2 172.8.146.6 1 msec 1 msec 1 msec<\/li><li>&nbsp;3 172.8.67.7 1 msec 1 msec 0 msec<\/li><li>&nbsp;4 172.8.57.5 1 msec * &nbsp;2 msec<\/li><\/ul>\n\n\n\n<p><br>R2#traceroute 3.3.3.3<\/p>\n\n\n\n<ul><li>Type escape sequence to abort.<\/li><li>Tracing the route to 3.3.3.3<\/li><li>VRF info: (vrf in name\/id, vrf out name\/id)<\/li><li>&nbsp;1 172.8.12.1 0 msec 1 msec 1 msec<\/li><li>&nbsp;2 172.8.146.4 2 msec 1 msec 0 msec<\/li><li>&nbsp;3 172.8.47.7 1 msec 2 msec 1 msec<\/li><li>&nbsp;4 172.8.57.5 2 msec 1 msec 1 msec<\/li><li>&nbsp;5 172.8.35.3 2 msec * &nbsp;4 msec<\/li><\/ul>\n\n\n\n<p><strong>Note:<\/strong><\/p>\n\n\n\n<p><strong>Although there are no routes for 3.3.3.3 and 172.8.35.0 on R2 (Area 146 is a special area), the default route can be used for communication.<\/strong><\/p>\n\n\n\n<p><strong>4. Add the following network segments to EIGRP 35 on R3:<\/strong><\/p>\n\n\n\n<p>Loopback17: 17.17.17.17\/32, Loopback101: 100.100.100.101\/32<\/p>\n\n\n\n<p>Loopback18: 18.18.18.18\/32, Loopback102: 100.100.100.102\/32<\/p>\n\n\n\n<p><strong>a. Configure the loopback 18 network segment to be transmitted only within EIGRP 35. Other addresses must be pinged through the entire network.<\/strong><\/p>\n\n\n\n<p><strong>b. Configure the most accurate route summary for Loopback 100 and Loopback 101, hide detailed routes, and summary routes are not allowed to appear in EIGRP 35.<\/strong><\/p>\n\n\n\n<p>R3:<\/p>\n\n\n\n<ul><li>interface&nbsp;Loopback 17<\/li><li>ip&nbsp;address&nbsp;17.17.17.17&nbsp;255.255.255.255<\/li><li>no shutdown<\/li><li>interface&nbsp;Loopback 18<\/li><li>ip&nbsp;address&nbsp;18.18.18.18&nbsp;255.255.255.255<\/li><li>no shutdown<\/li><li>interface&nbsp;Loopback 101<\/li><li>ip&nbsp;address&nbsp;100.100.100.101 255.255.255.255<\/li><li>no shutdown<\/li><li>interface&nbsp;Loopback 102<\/li><li>ip&nbsp;address&nbsp;100.100.100.102 255.255.255.255<\/li><li>no shutdown<\/li><li>router&nbsp;eigrp 35<\/li><li>network&nbsp;17.17.17.17&nbsp;0.0.0.0<\/li><li>network&nbsp;18.18.18.18&nbsp;0.0.0.0<\/li><li>network&nbsp;100.100.100.101 0.0.0.0<\/li><li>network&nbsp;100.100.100.102 0.0.0.0<\/li><\/ul>\n\n\n\n<p>R5:<\/p>\n\n\n\n<ul><li>ip&nbsp;prefix-list&nbsp;deny_18&nbsp;seq&nbsp;5&nbsp;permit&nbsp;18.18.18.18\/32<\/li><li>route-map&nbsp;e2o&nbsp;deny&nbsp;10<\/li><li>match&nbsp;ip&nbsp;address&nbsp;prefix-list&nbsp;deny_18<\/li><li>route-map&nbsp;e2o&nbsp;permit&nbsp;20<\/li><li>router&nbsp;ospf 100<\/li><li>redistribute&nbsp;eigrp 35 subnets&nbsp;route-map&nbsp;e2o<\/li><li>summary-address&nbsp;100.100.100.100 255.255.255.252<\/li><li>ip&nbsp;prefix-list&nbsp;deny_100 seq&nbsp;5&nbsp;permit&nbsp;100.100.100.100\/30<\/li><li>route-map o2e deny&nbsp;10<\/li><li>match&nbsp;ip&nbsp;address&nbsp;prefix-list&nbsp;deny_100<\/li><li>route-map&nbsp;o2e&nbsp;permit&nbsp;20<\/li><li>router&nbsp;eigrp 35<\/li><li>redistribute&nbsp;ospf 100 metric&nbsp;10000&nbsp;100&nbsp;255&nbsp;1&nbsp;1500&nbsp;route-map&nbsp;o2e<\/li><\/ul>\n\n\n\n<h2><span class=\"ez-toc-section\" id=\"%E2%80%A2_BGP_part\"><\/span><strong>\u2022 BGP part:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>1. Configure BGP according to the plan in red font as shown in the figure. The RID is the Loopback 0 address.<\/strong><\/p>\n\n\n\n<p><strong>2. Configure R1 of AS 146 as a route reflector and R4 \/ R6 as clients. Requires peer-group configuration.<\/strong><\/p>\n\n\n\n<p>R1:<\/p>\n\n\n\n<ul><li>router&nbsp;bgp&nbsp;146<\/li><li>bgp&nbsp;router-id&nbsp;1.1.1.1<\/li><li>neighbor&nbsp;peer&nbsp;peer-group<\/li><li>neighbor&nbsp;peer&nbsp;remote-as&nbsp;146<\/li><li>neighbor&nbsp;peer&nbsp;update-source&nbsp;Loopback0<\/li><li>neighbor&nbsp;peer&nbsp;route-reflector-client<\/li><li>neighbor&nbsp;peer&nbsp;next-hop-self<\/li><li>neighbor&nbsp;4.4.4.4&nbsp;peer-group&nbsp;peer<\/li><li>neighbor&nbsp;6.6.6.6&nbsp;peer-group&nbsp;peer<\/li><li>neighbor&nbsp;172.8.12.2&nbsp;remote-as&nbsp;22<\/li><\/ul>\n\n\n\n<p>R2:<\/p>\n\n\n\n<ul><li>router&nbsp;bgp&nbsp;22<\/li><li>bgp&nbsp;router-id&nbsp;2.2.2.2<\/li><li>neighbor&nbsp;172.8.12.1&nbsp;remote-as&nbsp;146<\/li><\/ul>\n\n\n\n<p><br>R3:<\/p>\n\n\n\n<ul><li>router&nbsp;bgp&nbsp;33<\/li><li>bgp&nbsp;router-id&nbsp;3.3.3.3<\/li><li>neighbor&nbsp;172.8.35.5&nbsp;remote-as&nbsp;57<\/li><\/ul>\n\n\n\n<p>R4:<\/p>\n\n\n\n<ul><li>router&nbsp;bgp&nbsp;146<\/li><li>bgp&nbsp;router-id&nbsp;4.4.4.4<\/li><li>neighbor&nbsp;1.1.1.1&nbsp;remote-as&nbsp;146<\/li><li>neighbor&nbsp;1.1.1.1&nbsp;update-source&nbsp;Loopback0<\/li><li>neighbor&nbsp;1.1.1.1&nbsp;next-hop-self<\/li><li>neighbor&nbsp;172.8.47.7&nbsp;remote-as&nbsp;57<\/li><\/ul>\n\n\n\n<p>R5:<\/p>\n\n\n\n<ul><li>router&nbsp;bgp&nbsp;57<\/li><li>bgp&nbsp;router-id&nbsp;5.5.5.5<\/li><li>neighbor&nbsp;7.7.7.7&nbsp;remote-as&nbsp;57<\/li><li>neighbor&nbsp;7.7.7.7&nbsp;update-source&nbsp;Loopback0<\/li><li>neighbor&nbsp;7.7.7.7&nbsp;next-hop-self<\/li><li>neighbor&nbsp;172.8.35.3&nbsp;remote-as&nbsp;33<\/li><\/ul>\n\n\n\n<p>R6:<\/p>\n\n\n\n<ul><li>router&nbsp;bgp&nbsp;146<\/li><li>bgp&nbsp;router-id&nbsp;6.6.6.6<\/li><li>neighbor&nbsp;1.1.1.1&nbsp;remote-as&nbsp;146<\/li><li>neighbor&nbsp;1.1.1.1&nbsp;update-source&nbsp;Loopback0<\/li><li>neighbor&nbsp;1.1.1.1&nbsp;next-hop-self<\/li><li>neighbor&nbsp;172.8.67.7&nbsp;remote-as&nbsp;57<\/li><\/ul>\n\n\n\n<p>R7:&nbsp;&nbsp;<\/p>\n\n\n\n<ul><li>router&nbsp;bgp&nbsp;57<\/li><li>bgp&nbsp;router-id&nbsp;7.7.7.7<\/li><li>neighbor&nbsp;5.5.5.5&nbsp;remote-as&nbsp;57<\/li><li>neighbor&nbsp;5.5.5.5&nbsp;update-source&nbsp;Loopback0<\/li><li>neighbor&nbsp;5.5.5.5&nbsp;next-hop-self<\/li><li>neighbor&nbsp;172.8.47.4&nbsp;remote-as&nbsp;146<\/li><li>neighbor&nbsp;172.8.67.6&nbsp;remote-as&nbsp;146<\/li><\/ul>\n\n\n\n<p><strong>1. Add the following network segments to R2 and publish them to BGP:<\/strong><\/p>\n\n\n\n<p><strong>Loopback24: 192.168.24.1\/24 Loopback25: 192.168.25.1\/24 Loopback26: 192.168.26.1\/24<\/strong><\/p>\n\n\n\n<p><strong>Add the following network segment on R3, Loopback30: 30.30.30.30\/27, and publish it to BGP:<\/strong><\/p>\n\n\n\n<p><strong>Configure the R2 BGP table as <\/strong>follows:&nbsp; &nbsp; &nbsp; &nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" class=\"alignnone wp-image-227\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/02.png\" alt=\"the R2 BGP table\" width=\"791\" height=\"259\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/02.png 791w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/02-300x98.png 300w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/02-768x251.png 768w\" sizes=\"(max-width: 791px) 100vw, 791px\" \/><\/figure>\n\n\n\n<p>R2:<\/p>\n\n\n\n<ul><li>interface&nbsp;Loopback 24<\/li><li>ip&nbsp;address&nbsp;192.168.24.1&nbsp;255.255.255.0<\/li><li>interface&nbsp;Loopback 25<\/li><li>ip&nbsp;address&nbsp;192.168.25.1&nbsp;255.255.255.0<\/li><li>interface&nbsp;Loopback 26<\/li><li>ip&nbsp;address&nbsp;192.168.26.1&nbsp;255.255.255.0<\/li><li>router&nbsp;bgp&nbsp;22<\/li><li>network&nbsp;192.168.24.0&nbsp;mask 255.255.255.0<\/li><li>network&nbsp;192.168.25.0&nbsp;mask 255.255.255.0<\/li><li>network&nbsp;192.168.26.0&nbsp;mask 255.255.255.0<\/li><li>aggregate-address&nbsp;192.168.24.0&nbsp;255.255.252.0&nbsp;summary-only<\/li><\/ul>\n\n\n\n<p>R3:<\/p>\n\n\n\n<ul><li>interface&nbsp;Loopback30<\/li><li>ip&nbsp;address&nbsp;30.30.30.30&nbsp;255.255.255.224<\/li><li>router&nbsp;bgp&nbsp;33<\/li><li>network&nbsp;30.30.30.0&nbsp;mask&nbsp;255.255.255.224<\/li><\/ul>\n\n\n\n<p><strong>4. Modify the BGP routing attributes on the appropriate routers so that the path from R2 to 30.30.30.30\/27 is: R1-R6-R7-R5-R3.<\/strong><\/p>\n\n\n\n<p>At this time, the BGP table of R2 remains unchanged as shown above, and the BGP routing of the R4 router is not changed.<\/p>\n\n\n\n<p><strong>Solution 1:<\/strong><\/p>\n\n\n\n<p>R1:<\/p>\n\n\n\n<ul><li>access-list&nbsp;1&nbsp;permit&nbsp;30.30.30.0&nbsp;0.0.0.31<\/li><li>route-map&nbsp;x&nbsp;permit&nbsp;10<\/li><li>match&nbsp;ip&nbsp;address&nbsp;1<\/li><li>set&nbsp;weight&nbsp;200<\/li><li>route-map&nbsp;x&nbsp;permit&nbsp;20<\/li><li>router&nbsp;bgp&nbsp;146<\/li><li>neighbor&nbsp;6.6.6.6&nbsp;route-map&nbsp;x&nbsp;in<\/li><li>clear ip bgp * soft<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" class=\"alignnone wp-image-228\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/03.png\" alt=\"Solution 1\" width=\"1020\" height=\"612\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/03.png 1020w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/03-300x180.png 300w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/03-768x461.png 768w\" sizes=\"(max-width: 1020px) 100vw, 1020px\" \/><\/figure>\n\n\n\n<p><strong>Solution 2:<\/strong><\/p>\n\n\n\n<p>R6:<\/p>\n\n\n\n<ul><li>access-list&nbsp;1&nbsp;permit&nbsp;30.30.30.0 0.0.0.31<\/li><li>route-map x permit&nbsp;10<\/li><li>match&nbsp;ip&nbsp;address&nbsp;1<\/li><li>set&nbsp;local-preference&nbsp;200<\/li><li>route-map&nbsp;x&nbsp;permit&nbsp;20<\/li><li>router&nbsp;bgp&nbsp;146<\/li><li>neighbor&nbsp;172.8.67.7&nbsp;route-map&nbsp;x&nbsp;in<\/li><li>&nbsp;<\/li><li>clear ip bgp * soft<\/li><\/ul>\n\n\n\n<p>R4:<\/p>\n\n\n\n<ul><li>router&nbsp;bgp&nbsp;146<\/li><li>neighbor&nbsp;172.8.47.7&nbsp;weight&nbsp;100<\/li><li>clear ip bgp * soft<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" class=\"alignnone wp-image-229\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/04-1024x595.png\" alt=\"Solution 2\" width=\"1024\" height=\"595\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/04-1024x595.png 1024w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/04-300x174.png 300w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/04-768x446.png 768w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/04.png 1026w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>Summary of routing table:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" class=\"alignnone wp-image-230\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/05-829x1024.png\" alt=\"Summary of routing table-R1\" width=\"829\" height=\"1024\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/05-829x1024.png 829w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/05-243x300.png 243w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/05-768x948.png 768w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/05.png 1032w\" sizes=\"(max-width: 829px) 100vw, 829px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" class=\"alignnone wp-image-231\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/06-791x1024.png\" alt=\"Summary of routing table-R2\" width=\"791\" height=\"1024\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/06-791x1024.png 791w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/06-232x300.png 232w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/06-768x994.png 768w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/06.png 1038w\" sizes=\"(max-width: 791px) 100vw, 791px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" class=\"alignnone wp-image-232\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/07.png\" alt=\"Summary of routing table-R3\" width=\"561\" height=\"721\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/07.png 561w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/07-233x300.png 233w\" sizes=\"(max-width: 561px) 100vw, 561px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" class=\"alignnone wp-image-233\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/08.png\" alt=\"Summary of routing table-R5\" width=\"518\" height=\"729\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/08.png 518w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/08-213x300.png 213w\" sizes=\"(max-width: 518px) 100vw, 518px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" class=\"alignnone wp-image-234\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/09.png\" alt=\"Summary of routing table-R5\" width=\"480\" height=\"672\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/09.png 480w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/09-214x300.png 214w\" sizes=\"(max-width: 480px) 100vw, 480px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" class=\"alignnone wp-image-235\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/10.png\" alt=\"Summary of routing table-R6\" width=\"518\" height=\"669\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/10.png 518w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/10-232x300.png 232w\" sizes=\"(max-width: 518px) 100vw, 518px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" class=\"alignnone wp-image-236\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/11.png\" alt=\"Summary of routing table-R7\" width=\"509\" height=\"716\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/11.png 509w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/04\/11-213x300.png 213w\" sizes=\"(max-width: 509px) 100vw, 509px\" \/><\/figure>\n\n\n\n<p><strong>If you want more labs and help, consult SPOTO for more info.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><a href=\"https:\/\/tb.53kf.com\/code\/client\/10172212\/1?custom_channel=chenjia\" target=\"_blank\" rel=\"follow no noopener\"><img loading=\"lazy\" class=\"alignnone wp-image-1816\" src=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/08\/contact-us-button-png-1-1024x388.png\" alt=\"contact us\" width=\"339\" height=\"128\" srcset=\"https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/08\/contact-us-button-png-1-1024x388.png 1024w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/08\/contact-us-button-png-1-300x114.png 300w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/08\/contact-us-button-png-1-768x291.png 768w, https:\/\/cciedump.spoto.net\/blog\/wp-content\/uploads\/2020\/08\/contact-us-button-png-1.png 1740w\" sizes=\"(max-width: 339px) 100vw, 339px\" \/><\/a><\/figure>\n\n\n\n<p><strong>Read more:<\/strong><\/p>\n\n\n\n<h5><a href=\"https:\/\/cciedump.spoto.net\/blog\/do-you-know-the-internal-structure-of-the-router_416.html\">Do You Know the Internal Structure of the Router?<\/a><\/h5>\n\n\n\n<h5><a href=\"https:\/\/cciedump.spoto.net\/blog\/cisco-knowledge-point-analysis-mpls-l2vpn-implementation_343.html\">Cisco Knowledge Point Analysis: MPLS L2VPN Implementation<\/a><\/h5>\n\n\n\n<h5><a href=\"https:\/\/cciedump.spoto.net\/blog\/new-knowledge-points-of-certified-exam-what-is-software-defined-networkingsdn_298.html\">New Knowledge Points of Certified Exam: What is 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