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Redistribution in OSPF How LSA 4 is used in Redistribution? How LSA 5 is Used in Redistribution? What is \"Forwarding Address\" in LSA 5? OSPF E1 and E2 Routes Configuring Redistribution Understanding OSPF Route Redistribution and LSA Types OSPF (Open Shortest Path First)\u2026","rel":"","context":"In "ospf"","block_context":{"text":"ospf","link":"https:\/\/www.zframez.com\/articles\/category\/routing\/ospf"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Redistribution-from-EIGRP-to-RIP.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Redistribution-from-EIGRP-to-RIP.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Redistribution-from-EIGRP-to-RIP.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Redistribution-from-EIGRP-to-RIP.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Redistribution-from-EIGRP-to-RIP.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Redistribution-from-EIGRP-to-RIP.png?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":292,"url":"https:\/\/www.zframez.com\/articles\/routing\/ospf-configuration-example","url_meta":{"origin":633,"position":1},"title":"OSPF Configuration Example 1: Adjacency Formation Between Two Cisco Routers","author":"sajith achipra","date":"July 19, 2024","format":false,"excerpt":"Table of Contents OSPF Configuration Example 1: Adjacency Formation Between Two Cisco Routers Configuration Procedure About OSPF Configuration Why use loopback interfaces? OSPF Configuration Commands Adjacency Verification Understanding the \"show\" commands OSPF Configuration Example 1: Adjacency Formation Between Two Cisco Routers In previous chapters, you learned key OSPF concepts like\u2026","rel":"","context":"In "ospf"","block_context":{"text":"ospf","link":"https:\/\/www.zframez.com\/articles\/category\/routing\/ospf"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-adjacency-topology.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-adjacency-topology.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-adjacency-topology.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-adjacency-topology.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-adjacency-topology.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-adjacency-topology.png?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":449,"url":"https:\/\/www.zframez.com\/articles\/routing\/ospf-configuration-examples-dr-bdr-election","url_meta":{"origin":633,"position":2},"title":"OSPF Configuration Example 3 : DR BDR election","author":"sajith achipra","date":"July 26, 2024","format":false,"excerpt":"Configuring OSPF DR and BDR with Interface Priority and Router ID In all shared networks like Ethernet, Frame Relay, and ATM, OSPF selects one router as the DR and another as the BDR. 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The objective of this exercise\u2026","rel":"","context":"In "ospf"","block_context":{"text":"ospf","link":"https:\/\/www.zframez.com\/articles\/category\/routing\/ospf"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":415,"url":"https:\/\/www.zframez.com\/articles\/routing\/understanding-ospf-dr-bdr-election","url_meta":{"origin":633,"position":4},"title":"Understanding OSPF DR BDR Election","author":"sajith achipra","date":"July 24, 2024","format":false,"excerpt":"Table of Contents What is a Designated Router or DR? What is a Backup Designated Router or BDR? DR BDR Election Process Why does OSPF elect the BDR before the DR? What is a DR Other? What happens after the election? How BDR will know DR is alive? OSPF Network\u2026","rel":"","context":"In "ospf"","block_context":{"text":"ospf","link":"https:\/\/www.zframez.com\/articles\/category\/routing\/ospf"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":262,"url":"https:\/\/www.zframez.com\/articles\/routing\/bgp-configuration-example-ebgp-loopback","url_meta":{"origin":633,"position":5},"title":"BGP Configuration Example 2: EBGP Using Loopback Interfaces","author":"sajith achipra","date":"July 18, 2024","format":false,"excerpt":"BGP Configuration Example In the last tutorial \u201cBGP configuration example : EBGP Peering\u201c, we configured an EBGP peering between two routers using their physical interface IP addresses. In this BGP configuration example, we\u2019ll use loopback interfaces for BGP peering. We prefer loopback interfaces when there are multiple paths between peers\u2026","rel":"","context":"In "bgp"","block_context":{"text":"bgp","link":"https:\/\/www.zframez.com\/articles\/category\/routing\/bgp"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/posts\/633","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/comments?post=633"}],"version-history":[{"count":4,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/posts\/633\/revisions"}],"predecessor-version":[{"id":873,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/posts\/633\/revisions\/873"}],"wp:attachment":[{"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/media?parent=633"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/categories?post=633"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/tags?post=633"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

\n
Table of Contents<\/h3>\n
\n
Redistribution of Static Routes: Topology and Configuration<\/a><\/li>\n
Understanding and Configuring Redistribution from EIGRP to OSPF<\/a><\/li>\n
Configuring Redistribution with Metric Type 1: \u201cO E1\u201d Routes<\/a><\/li>\n
Using the Route Tag Field in OSPF<\/a><\/li>\n
OSPF Commands to Configure Redistribution from Other Protocols<\/a><\/li>\n <\/ul>\n<\/div>\n\n\n\n\n
\n\n\n\n
Let\u2019s understand the OSPF redistribution commands using the following topology.<\/p>\n\n\n\n
$\"A$
Configuring redistribution from other protocols to OSPF<\/figcaption><\/figure>\n\n\n\n
Let\u2019s begin by looking at how to redistribute static routes.<\/strong><\/p>\n\n\n\n
Redistribution of Static Routes: Topology and Configuration<\/strong><\/h2>\n\n\n\n
In the topology above, Router 1 and Router 2 are using OSPF. There is a network 30.0.0.0\/8 on Router 3\u2019s loopback interface. To reach this network from Router 2, we add a static route. Now, Router 2 and Router 3 can reach the 30.0.0.0 network, but Router 1 cannot. This is where redistribution comes into play. On Router 2, we can configure the \u201credistribute static subnets<\/strong><\/code>\u201d command under OSPF configuration mode. This command injects the static route into OSPF, allowing Router 2 to advertise this network to Router 1 using an LSA type 5.<\/p>\n\n\n\n
Note:<\/strong> Adding the keyword \u201csubnets<\/code>\u201d at the end of the command is optional. If you omit it, only the major networks will be redistributed, and subnets will not be included. Therefore, if your network includes subnets that need to be redistributed, you must include the \u201csubnets<\/code>\u201d keyword at the end of the command.<\/p>\n\n\n\n
Now, let\u2019s go through the configuration commands for redistributing static routes in the above given topology.<\/p>\n\n\n\n
Configuration Commands: <\/strong><\/h3>\n\n\n\nConfiguring the IP address on FastEthernet 0\/0: 1.1.1.1\/8 and enabling OSPF on network 1.0.0.0 with a wildcard mask of 0.255.255.255 in Area 1 on Router 1:<\/p>\n\n\n\n
#Configuring IP address on the FE0\/0:\n\nR1(config)#\nR1(config)#interface FastEthernet0\/0\nR1(config-if)#ip address 1.1.1.1 255.0.0.0\nR1(config-if)#exit\nR1(config)#\n\n#Enabling OSPF and advertising the network 1.0.0.0\/8 :\n\nR1(config)#\nR1(config)#router ospf 1\nR1(config-router)#network 1.0.0.0 0.255.255.255 area 0\nR1(config-router)#exit\nR1(config)#<\/code><\/pre>\n\n\n\nR2 Configuration: <\/strong>On Router 2, we need to configure IP addresses on the interfaces, add a static route, and redistribute the static route into OSPF. The following commands will configure the IP 1.1.1.2\/8 on FastEthernet 0\/0, 2.2.2.2\/8 on FastEthernet 0\/1, add a static route to 30.0.0.0\/8, and finally redistribute that static route into OSPF.<\/p>\n\n\n\n
#1.Configuring IP address on the FE0\/0 (Connected to R1)\n\nR2(config)#\nR2(config)#interface FastEthernet0\/0\nR2(config-if)#ip address 1.1.1.2 255.0.0.0\nR2(config-if)#exit\nR2(config)#\n\n#2.Configuring IP address on the FE0\/1 (Connected to R3)\n\nR2(config)#\nR2(config)#interface FastEthernet0\/1\nR2(config-if)#ip address 2.2.2.2 255.0.0.0\nR2(config-if)#exit\nR2(config)#\n\n#3.Configuring the static route to 30.0.0.0\/8 via 2.2.2.3 (R3's IP)\n\nR2(config)#ip route 30.0.0.0 255.0.0.0 2.2.2.3\n\n#4.Enabling OSPF and advertising the network 1.0.0.0\/8\n\nR2(config)#router ospf 1\nR2(config-router)#network 1.0.0.0 0.255.255.255 area 0\n\n#5. Configuring redistribution of static routes in to OSPF\n\nR2(config-router)#redistribute static subnets<\/mark>\nR2(config-router)#exit\nR2(config)#<\/code><\/pre>\n\n\n\nR3 Configuration: <\/strong>Note: You don\u2019t need to configure Router 3 if you only want to check whether the static route is being redistributed into OSPF. By configuring the commands on R1 and R2, the static route to 30.0.0.0\/8 will be redistributed into OSPF, and you can verify this route in R1\u2019s routing table. However, if you want to test whether data packets can be sent to this redistributed network using Ping, you\u2019ll need to configure R3 as well. Additionally, R3 must have a static route to the 1.0.0.0 network for the ping packets to return successfully. Following commands will configure IP address 2.2.2.3\/8 on Fastethernet 0\/1 , 30.1.1.1\/8 on Loopback interface and will add static route to 1.0.0.0\/8<\/p>\n\n\n\n
#1.Configuring IP address on the FE0\/1 (Connected to R2)\n\nR3(config)#\nR3(config)#interface FastEthernet0\/1\nR3(config-if)#ip address 2.2.2.3 255.0.0.0\nR3(config-if)#exit\nR3(config)#\n\n#2. Configuring IP address on Loopback interface\n\nR3(config)#\nR3(config)#interface loopback 1\nR3(config-if)#ip address 30.1.1.1 255.0.0.0\nR3(config-if)#exit\nR3(config)#\n\n#3. Add a static route to 1.0.0.0\/8 network via 2.2.2.2\nR3(config)#ip route 1.0.0.0 255.0.0.0 2.2.2.2<\/code><\/pre>\n\n\n\n
Verifying the OSPF Redistribution Configuration<\/strong><\/h2>\n\n\n\n
Now, let\u2019s check the results of this configuration. Ideally, Router 1 should receive the 30.0.0.0\/8 network from Router 2. This route will appear in Router 1\u2019s routing table with the code \u2018O E2,\u2019 indicating that it is a redistributed route. \u2018O E2\u2019 stands for OSPF External Type 2 route. As we discussed in the other chapter about redistribution, O E2 routes do not factor in the internal cost to reach the Autonomous System Boundary Router (ASBR). Therefore, the cost or metric to reach this network will be 20, which is the default cost that OSPF assigns when redistributing external routes.<\/p>\n\n\n\n
$\"Output$
Output of \u2018show ip route\u2019<\/strong> showing the redistributed route<\/figcaption><\/figure>\n\n\n\n
\n\n\n\n
Understanding and Configuring Redistribution from EIGRP to OSPF<\/strong><\/h2>\n\n\n\n
Next, let\u2019s explore how to perform redistribution from another protocol. In this example, we\u2019ll use EIGRP, though you could use any other protocol like BGP, ISIS, or RIP. To redistribute from EIGRP, we\u2019ll add one more loopback interface on R3 with the network address 31.0.0.0\/8. R3 will advertise this network to R2 using EIGRP, and R2 will then redistribute this network into OSPF.<\/p>\n\n\n\n
Below are the commands you need to add on R2 and R3. Assuming that you have already configured the IP addresses from the previous exercise, we\u2019ll only show the commands required to configure EIGRP and redistribute the networks learned from EIGRP into OSPF. When configuring EIGRP, you need to specify the Autonomous System (AS) number. .<\/p>\n\n\n\n
R2 Configuration:<\/strong> In the following configuration, we\u2019re using AS number 100. When issuing the redistribution command, this AS number must be included. So, in this case, the command to redistribute EIGRP networks of AS 100 into OSPF will be \u201credistribute eigrp 100 subnets<\/strong><\/code>\u201c<\/p>\n\n\n\n
#1. Configuring EIGRP with AS number 100 and advertising the network 2.0.0.0\n\nR2(config)#\nR2(config)#router eigrp 100<\/mark>\nR2(config-router)#network 2.0.0.0\nR2(config-router)#exit\nR2(config)#\n\n#2. Redistributing EIGRP networks in to OSPF\n\nR2(config)#\nR2(config)#router ospf 1\nR2(config-router)#redistribute eigrp 100 subnets<\/mark>\nR2(config-router)#exit\nR2(config)#<\/code><\/pre>\n\n\n\nR3 Configuration:<\/strong> On Router 3, we are only configuring the loopback interface and enabling EIGRP to advertise that network. Assuming the IP address for the physical interface is already configured, the following commands will configure the IP 31.1.1.1\/8 on Loopback 2 and enable EIGRP with AS number 100 to advertise networks 2.0.0.0 and 31.0.0.0.<\/p>\n\n\n\n #1. Configuring IP address on second Loopback interface\n\nR3(config)#\nR3(config)#interface loopback 2\nR3(config-if)#ip address 31.1.1.1 255.0.0.0\nR3(config-if)#exit\nR3(config)#\n\n#2. Configuring EIGRP with AS number 100 and advertising the networks 2.0.0.0 and 31.0.0.0\n\nR3(config)#\nR3(config)#router eigrp 100\nR3(config-router)#network 2.0.0.0\nR3(config-router)#network 31.0.0.0\nR3(config-router)#exit\nR3(config)#<\/code><\/pre>\n\n\n\nVerifying the results:<\/strong><\/p>\n\n\n\n <\/figure>\n\n\n\nIn the output of \u201cshow ip route\u201d <\/strong>on R1 shown above, you can see two newly redistributed routes on R1: 2.0.0.0 and 31.0.0.0, both marked with the code \u2018O E2.\u2019 These are the networks that OSPF has redistributed from EIGRP on R2. Note that, similar to the previously redistributed static route, these networks also have a metric of 20.<\/p>\n\n\n\n \n\n\n\nConfiguring redistribution with Metric Type 1 : O E1 routes<\/strong><\/h2>\n\n\n\nIn the previous examples, we saw OSPF advertising the redistributed routes with the code \u2018O E2,\u2019 which stands for External Type 2 routes. In these routes, the metric assigned to the networks remains constant across the OSPF network, meaning routers inside the OSPF domain do not consider the internal cost to reach the ASBR. So, the metric that the ASBR announces is the one used by these routers. In other words, with \u2018O E2\u2019 routes, the metric shown in the routing table is not the actual path cost \u2013 it\u2019s just the metric set by the ASBR for that network.<\/p>\n\n\n\n If you want OSPF to calculate the actual cost, including the internal cost to reach the ASBR, you can use the \u2018Metric Type 1\u2019 option. This requires configuring your ASBR to announce the redistributed networks with \u2018Metric Type 1.\u2019 You can do this in OSPF configuration mode. For example, if you want to use Metric Type 1 in the scenarios we discussed earlier, you can use \u201credistribute static subnets metric-type 1<\/strong><\/code>\u201d or \u201credistribute eigrp 100 subnets metric-type 1<\/strong><\/code>\u201c.<\/p>\n\n\n\n Configuring redistribution with metric type 1 on R2 (ASBR)<\/strong> :<\/p>\n\n\n\n R2(config)#\nR2(config)#router ospf 1\nR2(config-router)#redistribute static subnets metric-type 1<\/mark>\nR2(config-router)#redistribute eigrp 100 subnets metric-type 1<\/mark>\nR2(config-router)#exit\nR2(config)#<\/code><\/pre>\n\n\n\nNow, let\u2019s check the impact of this configuration on Router 1\u2019s routing table using \u201cshow ip route\u201d<\/strong>.<\/p>\n\n\n\n Routing table of Router 1 showing \u2018O E1\u2019 routes after setting the metric type to 1.<\/figcaption><\/figure>\n\n\n\nIn the output of \u201cshow ip route\u201d<\/strong> on R1 shown above, you can see that the code has changed to \u2018O E1<\/strong>,\u2019 and the metric is now 21. In this setup, there\u2019s a fast Ethernet link between Router 1 and Router 2, which has a cost of 1. Therefore, the total cost is calculated as the advertised cost of 20 plus the internal cost of 1, resulting in a metric of 21<\/p>\n\n\n\n \n\n\n\nUsing the Route Tag Field in OSPF<\/strong><\/h2>\n\n\n\nWhen configuring OSPF redistribution, the tag is an optional field that can be used to mark redistributed routes with a 32-bit value known as the \u2018External Route Tag.\u2019 This tag appears in Type 5 and Type 7 LSAs, which advertise external routes in OSPF. The tag is a number that admins can set when redistributing networks into OSPF. It can be used for various purposes, such as filtering routes, preventing loops when multiple ASBRs are involved, applying route policies, and tracking routes.<\/p>\n\n\n\n Configuring Route Tags while configuring static routes to OSPF :<\/strong><\/p>\n\n\n\n R2(config)#\nR2(config)#router ospf 1\nR2(config-router)#redistribute static subnets tag 150<\/mark>\nR2(config-router)#exit\nR2(config)#<\/code><\/pre>\n\n\n\n \n\n\n\nOSPF Commands to Configure Redistribution from Other Protocols<\/strong>:<\/h3>\n\n\n\nYou can use the same method to configure redistribution from other routing protocols. Below are the commands you need to use to redistribute from BGP, ISIS, RIP, and directly connected routes:<\/p>\n\n\n\n \nredistribute bgp 10 subnets<\/strong><\/code> (where 10 is the BGP AS number)<\/li>\n\n\n\n redistribute isis subnets<\/strong><\/code><\/li>\n\n\n\n redistribute rip subnets<\/strong><\/code><\/li>\n\n\n\n redistribute connected subnets<\/strong><\/code><\/li>\n<\/ol>\n\n\n\n \n\n\n\n\n Next >>> BGP Configuration Example 1: EBGP Peering<\/a> \n Previous >>> OSPF Configuration Example 3 : DR BDR election<\/a>\n<\/p>\n\n\n\n <\/p>\n<\/body>","protected":false},"excerpt":{"rendered":" Configuring Redistribution, E1 Metric, and Route Tags in OSPF In the tutorial \u201cUnderstanding OSPF Redistribution\u201d , we discussed different concepts in redistribution. In this one, we\u2019ll go through the various OSPF commands related to redistribution. We\u2019ll walk through a step-by-step process to configure redistribution in OSPF, focusing on scenarios like redistributing from Static routes and […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"wp-custom-template-post-with-sidebar2","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[163,66],"tags":[152,188,231,230,232,229,228,233],"class_list":["post-633","post","type-post","status-publish","format-standard","hentry","category-ospf","category-routing","tag-cisco-ospf-configuration","tag-cisco-ospf-redistribution-commands","tag-configuring-ospf-metric-type-1","tag-configuring-ospf-oe1-routes","tag-eigrp-to-ospf-redistribution-commands","tag-how-to-configure-redistribution","tag-ospf-redistribution-commands","tag-static-route-to-ospf-redistribution-commands"],"yoast_head":"\nOSPF Configuration Example 4 : Redistribution Commands - Tutorials<\/title>\n<meta name=\"description\" content=\"Explore OSPF configuration commands for redistributing from Static routes and EIGRP with commands to configure OE1 routes and route tags.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.zframez.com\/articles\/routing\/ospf-redistribution-commands\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Advanced OSPF Configuration Commands: Mastering Redistribution, Metric Types, and Route Tags\" \/>\n<meta property=\"og:description\" content=\"Master OSPF configuration commands to redistribute routes across protocols like EIGRP, BGP, Static routes. 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You\u2026","rel":"","context":"In "ospf"","block_context":{"text":"ospf","link":"https:\/\/www.zframez.com\/articles\/category\/routing\/ospf"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ospf-topology-for-DR-BDR-election-with-priority.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ospf-topology-for-DR-BDR-election-with-priority.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ospf-topology-for-DR-BDR-election-with-priority.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ospf-topology-for-DR-BDR-election-with-priority.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ospf-topology-for-DR-BDR-election-with-priority.png?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":611,"url":"https:\/\/www.zframez.com\/articles\/routing\/ospf-configuration-example-multi-area-setup","url_meta":{"origin":633,"position":3},"title":"OSPF Configuration Example 2: Multi-Area Setup","author":"sajith achipra","date":"August 18, 2024","format":false,"excerpt":"Configuring OSPF with Multiple Areas : Earlier, we covered how to configure OSPF with two routers in the same area. 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The objective of this exercise\u2026","rel":"","context":"In "ospf"","block_context":{"text":"ospf","link":"https:\/\/www.zframez.com\/articles\/category\/routing\/ospf"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/08\/Screenshot-2024-08-18-171023.png?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":415,"url":"https:\/\/www.zframez.com\/articles\/routing\/understanding-ospf-dr-bdr-election","url_meta":{"origin":633,"position":4},"title":"Understanding OSPF DR BDR Election","author":"sajith achipra","date":"July 24, 2024","format":false,"excerpt":"Table of Contents What is a Designated Router or DR? What is a Backup Designated Router or BDR? DR BDR Election Process Why does OSPF elect the BDR before the DR? What is a DR Other? What happens after the election? How BDR will know DR is alive? OSPF Network\u2026","rel":"","context":"In "ospf"","block_context":{"text":"ospf","link":"https:\/\/www.zframez.com\/articles\/category\/routing\/ospf"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/OSPF-Adjacency-with-out-DR.png?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":262,"url":"https:\/\/www.zframez.com\/articles\/routing\/bgp-configuration-example-ebgp-loopback","url_meta":{"origin":633,"position":5},"title":"BGP Configuration Example 2: EBGP Using Loopback Interfaces","author":"sajith achipra","date":"July 18, 2024","format":false,"excerpt":"BGP Configuration Example In the last tutorial \u201cBGP configuration example : EBGP Peering\u201c, we configured an EBGP peering between two routers using their physical interface IP addresses. In this BGP configuration example, we\u2019ll use loopback interfaces for BGP peering. We prefer loopback interfaces when there are multiple paths between peers\u2026","rel":"","context":"In "bgp"","block_context":{"text":"bgp","link":"https:\/\/www.zframez.com\/articles\/category\/routing\/bgp"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.zframez.com\/articles\/wp-content\/uploads\/2024\/07\/ebgp-configuration-topology.png?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/posts\/633","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/comments?post=633"}],"version-history":[{"count":4,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/posts\/633\/revisions"}],"predecessor-version":[{"id":873,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/posts\/633\/revisions\/873"}],"wp:attachment":[{"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/media?parent=633"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/categories?post=633"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zframez.com\/articles\/wp-json\/wp\/v2\/tags?post=633"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}