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This second choice by design we are going to take a look.
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Is Malte aria or OSPF
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Matsuri or SBF which is a way of limiting the amount of neighbors in an area is also at design option
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for the OSPF by using material as if we are having small Luling state database and routing tables and
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we are making Reier SBF calculations.
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This design is suitable for suitable solution for large networks to degrees.
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Processing our hath as you can see in here we have multiple areas in here and there area of 50 and the
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area 60.
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And each area is connected to areas zero which is backbone area by an area border rather each additional
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area in OSPF domain must have a connection to the oil spill backbone area as I told you and such connections
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are maintained by an interconnecting rather known as an area or border rather or a B R and AB are maintained
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separately in state databases for each area it serves and maintains summarized routes for all areas
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in the network.
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For example if the link between rather eights and the rather nine is down area burder rather which is
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rather two for this area isolates the fault.
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So just the area of 50 is effected from failure and makes SBF recalculation.
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Let's go ahead with the auto system boundary rather which is a spear and alter them System bonder rather
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is rather that is connected by using more than one running portico and that exchanged routing information
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with others Altan them System A is B is typically also run an exterior running Portico for example such
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as BGP or use static gruts or both.
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And a spear is used to Disturbia routes received from either external autonomous thems through its own
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autonomic system.
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And here is the OSPF LSA types.
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We have seven types of the OSPF ls.
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The first elicit type is the rudder elysée and this Elisei is generated by all routers to describe directly
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attached links.
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This second elysée is network elysée.
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And this elysée is generated by dir to describe the neighbors connect to that segment.
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This second third and fourth ELAS these are the summary I will say.
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And these guys are generated by a beer to describe arrow to a spear to neighbors outside the area.
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Type five elysée is the external the say and they are generated by a spear to describe broths to redistribute
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it into the area.
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The sixth is the multicast elysée and used in multicast or SBF.
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And this is not supported in Cisco devices.
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And this seven elysée LC type Selam is the NSA external elysée not so Stobie area and generated by an
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air or inside an NSA area to describe Rudds redistributed in the not so slobby area.
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Let's go ahead with the oil spill from table review.
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As you can see here to display the oil spill of us for the rather for we're typing show I ping rods
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and or Espey of command and we have some entries in here as you can see we have some keywords which
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are I a or some Leather's like all in here and they mean all means for example the oil spill SPF I a
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means the sear a make it also CD you and it to as you can see in here.
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And these guys are the thoughts redistributed into the area.
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This go with the oil spill from summarization in an OSPF design just a B or and a and b or others can
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summarize the route's guys.
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OSPF entery route summarization and as I told you AP US can summarize the rods between backbone and
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the other areas.
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And as you can see and as an example in here we have two separate works and they are 10:41 one zero
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and 10:41 to zero and slash 24.
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As you can see in here and rather true for example which is an AB or is representing destructs by using
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a single drop which is from 41 0 0 slash 20 to
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is beares also can summarize in or SBF true.
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And as Pierce can summarize many Excello runs into one Lincs the advertisement and let's go ahead with
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the configuration of the model Turiya or as Peter to configure Ramal Turia OSPF Kreiss we are using
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these commands as you can see in here for example or rather to configure the O S and we're typing rather
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OSPF and the process number and hitting the enter key then we are in the coffee grinder mode anymore.
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The first thing we should do is defining our rather ideal first.
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We are defining a rather ID.
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Please pay attention.
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Remember that as I explained you on our previous slide this is not an IP address or something like that
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we are defining a Radway the mostly we are defining these guys similar to our other names for rather
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to we can use the 1:58 to mostly but that is arbitrary but in most cases we are using like that.
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And then in the third step we're defining our network statements for example.
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This guy is rather too is connected to these two networks as you can see them 41 50 zero Slish 24 and
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10:41 26 zeros slash twenty four with two networks.
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As you can see here and we are defining these netbooks that months for example Network 10 14 15 0 with
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the wildcard mask of 0 0 0 that 255 because of we're using slushed 24 which means 255 255 2:55 that's
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zero.
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And if I can if I can work this to the wildcard mask that's the one cat Mackoff the cement mask 000
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2:55 and this work belonging to the area or 15 area 50 I'm sorry.
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And and Taiping the area of 50 with the same logic as you can see we have another network connected
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to the other two this network is in area zero.
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And we are tapping network and the network ID 10:41 7:34 zero.
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And because we're using slushed 24 again the wildcard mask will be 0 0 0 255 and area will be the area
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0.
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So let's go ahead with the multi-grain OSPF version 3 configuration 2 configuration known as P.F. version
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3.
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We need to get into the interface mode separately and we need to activate the oil spill for each interface.
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For example 4 gig 0 0 we have this network in here.
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10:41 XPS 50 0 and 4 Gigs 0 1 we have this number again here.
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And but we're not using the network IDs in here.
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What we are doing just for actuating the and 2006 wording under the interfaces.
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By using the IP version 6 or SPF the process number command and we're typing the area and the area number
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and that's it to configure route summarization or then AB our guys we are we're using the area arr.
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command for example for rather to you find one to configure route summarization.
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And if I want to summarize these two guys by using as single network which is 10:41 0 0 sledged 22 the
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command line using is the area range command.
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OK.
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I'm you I'm typing on rather to area 50
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range then I'm typing the summerize draft them 41 0 0 with the subnet mask or to reverse 255 2:55 to
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return to that 0.
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OK.
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That makes the summarization for us to where Fido is piff version 2 and as before and through each configuration
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we can use the show IP port of call soybean route.
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Sure if you are SPF Sharpy OSPF neighbor interface and the database commands.
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Please keep in mind that we should use IP version 6 instead of IP to wait for ID or SPF persion 3 configuration
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for example show IP version 6.
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Instead of show IP route.
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