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These are the user uploaded subtitles that are being translated: 1 00:00:00,000 --> 00:00:05,000 align:middle line:84% Administrative distance is then used as a tie breaker 2 00:00:05,000 --> 00:00:09,000 align:middle line:84% to determine which way to go when multiple routing protocols 3 00:00:09,000 --> 00:00:11,000 align:middle line:84% tell the router to go different ways. 4 00:00:11,000 --> 00:00:16,000 align:middle line:84% as an analogy, administrative distance is used as a tie breaker 5 00:00:16,000 --> 00:00:19,000 align:middle line:84% to determine which way to forward the traffic 6 00:00:19,000 --> 00:00:23,000 align:middle line:84% if OSPF says go left and EIGRP says go right 7 00:00:23,000 --> 00:00:26,000 align:middle line:84% the router uses administrative distance 8 00:00:26,000 --> 00:00:29,000 align:middle line:84% to determine which routing protocol it believes most. 9 00:00:29,000 --> 00:00:34,000 align:middle line:84% Technically, what happens is that the routing protocol 10 00:00:34,000 --> 00:00:38,000 align:middle line:84% with the lowest administrative distance is more believable 11 00:00:38,000 --> 00:00:41,000 align:middle line:84% and its routing information is inserted into the RIB 12 00:00:41,000 --> 00:00:46,000 align:middle line:84% or Routing Information Based or routing table in preference 13 00:00:46,000 --> 00:00:51,000 align:middle line:84% of other routing protocols that have a higher administrative distance 14 00:00:51,000 --> 00:00:56,000 align:middle line:84% so EIGRP has a lower administrative distance than OSPF. 15 00:00:56,000 --> 00:01:00,000 align:middle line:84% EIGRP has an administrative distance of 90 16 00:01:00,000 --> 00:01:02,000 align:middle line:84% OSPF has an administrative distance of 110 17 00:01:02,000 --> 00:01:08,000 align:middle line:84% so internal EIGRP would be preferred over OSPF. 18 00:01:08,000 --> 00:01:11,000 align:middle line:84% So the lower the administrative distance 19 00:01:11,000 --> 00:01:14,000 align:middle line:84% the more believable a routing protocol is 20 00:01:14,000 --> 00:01:17,000 align:middle line:84% you cannot believe anyone more than yourself 21 00:01:17,000 --> 00:01:21,000 align:middle line:84% so a router will believe routes that it originates 22 00:01:21,000 --> 00:01:25,000 align:middle line:84% above routes received from neighboring devices. 23 00:01:25,000 --> 00:01:29,000 align:middle line:84% A directly connected interface has a believability factor 24 00:01:29,000 --> 00:01:31,000 align:middle line:84% or administrative distance of 0. 25 00:01:31,000 --> 00:01:35,000 align:middle line:84% A static route configured to a next hop IP address 26 00:01:35,000 --> 00:01:38,000 align:middle line:84% has an administrative distance of 1. 27 00:01:38,000 --> 00:01:42,000 align:middle line:84% When a static route is configured to a directly connected interface 28 00:01:42,000 --> 00:01:45,000 align:middle line:84% it is deemed to be directly connected 29 00:01:45,000 --> 00:01:51,000 align:middle line:84% and therefore has a believability factor or administrative distance of 0. 30 00:01:51,000 --> 00:01:55,000 align:middle line:84% The reason why static routes have such a low administrative distance 31 00:01:55,000 --> 00:02:00,000 align:middle line:84% is that the router believes that you know more than other routers do. 32 00:02:00,000 --> 00:02:05,000 align:middle line:84% You as the administrator are supposed to know what you're doing 33 00:02:05,000 --> 00:02:09,000 align:middle line:84% and thus the router believes you more than it believes 34 00:02:09,000 --> 00:02:15,000 align:middle line:84% routes received via routing protocols such as OSPF or EIGRP. 35 00:02:15,000 --> 00:02:20,000 align:middle line:84% EIGRP has administrative distance of 90 for internal routes 36 00:02:20,000 --> 00:02:26,000 align:middle line:84% those are routes that originated in EIGRP and will not be redistributed 37 00:02:26,000 --> 00:02:32,000 align:middle line:84% or taken from a different routing protocol and then put into EIGRP. 38 00:02:32,000 --> 00:02:35,000 align:middle line:84% OSPF has an administrative distance of 110 39 00:02:35,000 --> 00:02:38,000 align:middle line:84% RIP has an administrative distance of 120 40 00:02:38,000 --> 00:02:42,000 align:middle line:84% and unknown routes have an administrative distance of 255 41 00:02:42,000 --> 00:02:49,000 align:middle line:84% as you can see EIGRP has a lower administrative distance than RIP does 42 00:02:49,000 --> 00:02:55,000 align:middle line:84% and that’s because EIGRP is a better or more powerful routing protocol. 43 00:02:55,000 --> 00:03:01,000 align:middle line:84% EIGRP will take bandwidth and delay into account when determining the best route. 44 00:03:01,000 --> 00:03:03,000 align:middle line:84% RIP only uses hop count 45 00:03:03,000 --> 00:03:08,000 align:middle line:84% so EIGRP seems to be better than OSPF which is better than RIP. 5321