First Hop Redundancy - Introduction - Video By Sikandar Shaik || Dual CCIE (RS/SP) # 35012

[Music] so in this session we are going to discuss about a topic called first how great is the protocol safe HRP so there are three major protocols which are used for providing resonance in the network like if you remember in our default routing concepts in general let's take an example I have a router which is connected to my lamb and in the LAN I have multiple users in the LAN ok and this router is connecting to my service for us from where I am able to access my internet services so now what we are going to do is this this banjo is again connecting to some other branch offices that is a different thing again assuming that this router is continued ISP so we will go to this router and we are going to configure IP route command and then we'll say zero zero zero zero where we are going to define the default route and then whatever be the subnet mask simply forward it to next hop assume the next hop address is to door to door to door to so once I define this automatically all the users in my land if any unknown packet come let's say this user want to go to any yahoo.com it reaches your gateway and this router is going to forward the packet to the next hop because any unknown destination simply forward 22.2 dot - dot - from there reaches is fin which is Internet so this is the way we provide access to our Internet connections so this is something what we also learn in our default robbing concepts but now what happens is the link connecting to ISP coast on maybe the ISP goes down due to any reason this through this is PR not able to access the Internet which means single point of failure so you just have a single point of failure because there is only one ISP connection which is going and as of now it is done so now to provide redundancy in our scenario what we can do is we can add one more line so which is generally a most common practice we are going to take another line from another for which is again current into internet and maybe the next hop address is one dot one dot one dot one something okay so now what we are going to do is we are going to the same router again and I am going to add one more command I will say IP route whatever be the destination whatever be the subnet mask and then the next hop but this is one dot one dot one dot one and then I am going to define the initial distance if you remember we we have an option called at least resistance so here I got into command line of the router just to show the commands in general we type the command called IP route destination network ID we can just define the destination network ID anything so we are going to use default hood so I am going to say 0 0 0 0 0 0 0 0 the next reporters IP route stimulant you can see the option here once a key question mark I can define the next hop address the next row of orders I am going to say 2.2 dot 2.2 as per our diagram and then if use question mark is one more option called admitted distance here so this interest rate is going admitted distance is going to decide which route is more preferred so now in our example here it also what we are going to do is instead of defining the default values like I'm instead of defining these values I am going to change the initial distance of this in our base 10 so when you are defining two values the first value which is using the default route yr is p1 which is maybe I am using some high-speed connection maybe some eight mvps line I am using and this is the second ISP line which I am taking just to ambiguous of line and I want to ensure that my 2 Mbps line from is p2 must be used as a backup link so in that case we can increase the initial distance of that route so when I say initial distance 10 by default it uses 1 year it's going to always prefer the first route in case if that particular static route fails then only it is going to shift to the alternate route so using two different connections from two different ISPs maybe same bandwidth or different bandwidth depending upon the requirement we are going to provide the resonance option here the main advantage in this scenario is we get the redundancy for ISP where the end users in the land they will not experience any delay because in case the router is not able to forward the traffic from the sp1 due to any reason if that link fails or the SP goes on automatically it will redirect the traffic from the alternate route because we have configured both the default roles in our routing table so this will be of providing the residency but the major drawback with this one is what happens if the router fails so there is no redundancy for the hardware there is it is redundancy for your ISP connections but there is no redundancy for your hardware or your gateway okay so there is no agency for the Gateway because there is only one physical gateway so you can say I am going to replace with the new router but even I could replace that with a new doctor still it will take some time for you to provide the connectivity at the same time you have to load the configurations on the router means all the routing configurations everything like Ezio's and that whatever it is confirmed noting all those configurations it will easily take them take some time so meantime these uses in the land they will not be able to access the resources on the other end so it can be internet or it can be any other majorly internet we use okay so there is no redundancy for your hardware so that's the major drawback with this one so to overcome this what we are going to do is we are going to use something called FS RP for stop the in NC protocols typically there are three types of protocols we call vrrp GLB P and H SRP these are the T major protocols which we use and these protocols will overcome the disadvantage whatever we face here in so the main concept here so I am NOT getting into these particle path default routes you already know how to do these things in your basic routing studies in your basic CCNA studies but in this session you are going to focus on the different options of the default Rob we have and how we are going to implement and how they are exactly going to work so we call them as first table residency protocols and this is the three protocols generally hitches RPC Cisco proprietary we will see the differences but before we get into the differences the first thing we need to understand is the behavior and the advantage what we get okay so let's move on with the advantage they try to see the difference so let us verify how H SRP we are PR LBP works here so I'm going to take one scenario here where I got a LAN here so they're all my users in my LAN so it can be one physical PC or it can be multiple physical pcs okay so what I'm going to do is it can be hundreds of computers in my lab so instead of connecting our routers to internet using one gateway we are going to connect it from two different gateways so let us see more clearly here so already we have internet line which is coming from service portal and it is going to come from is p1 which is my posture is border and then it's going to connect to my router one or it can be another router ok so similar way I'm going to take two is different ISP lines here so one coming from is p1 may be from coming from is p2 this is is p2 instead of connecting these two connections on the same router because if you are going to connect them on the same router if this router fails it's a single point of failure because the default routes are confidant the router if the router is on your entire users will not be able to access Internet so to overcome these things what we are going to do is we are going to take the same line maybe from the same different different service border don't go with the same service for a preferably to go with another service for them and then it is connecting to some other router maybe on the router 3 to different office and then these two routers are again they are connecting to my land to the switch on a two different ports okay now in my LAN user there is a user let's say 192 168 1.1 is IPS in my LAN I am using 1 9 2 161 door network so now I want to ensure that all my lan users should be able to access internet without any delay I should have redundancy which means automatically my traffic may be using the first gateway if that gates with fails it will it should automatically get redirected from the second gateway okay so now what is the solution here so the solution here is if you remember we are going to assign the Gateway papers whatever the interface connecting to the line that will be our gateway IP address so I'm going to say 192 168 1 dot 100 here and I'm going to use 192 168 1 dot 2 1 atm because we cannot use the same ip 4 to divide different devices now these two gateways are actually the same LAN interfaces so these two gateways and my LAN they should be in the same network that is the basic networking we know but now the question is on this PC I need to tell the IP address in my case I am using the IP address as 192 168 1.1 is IP address of my users other users may be using 191 192 168 1.2 1.3 it will go on now subnet mask maybe I am using slash 24 7 marks now I need to define what is the default gateway for my LAN users now I should use this gateway from router 1 or I should use the gateway from out of 3 if I define the Gateway address as 192 168 1 dot 100 let's say all my traffic will be going via the first gateway because in my PC I was defined with the gateway address of 191 68 1 dot 100 which means the second gateway is not at all used and if I define the gateway of 192 168 2 dot one dot 200 which means all my traffic will be going by our ISP 2 which is 1 or 200 so even I cannot say that I will use the half 100 for half of the users okay I'll use the half of the users will use this Caitlyn that is okay maybe you are using two different gateways but in case if something goes wrong let's say this gateways Don or maybe the ISP is down this is some problem from ISP side maybe the link connecting to ISPs down or maybe the link connecting to router one to the LAN goes down if something goes wrong on that particular path automatically the users who are using this gateway will not be able to access internet so it's simple those users will not be able to access Internet and changing the gateway in the production network is not possible no you cannot even say that I will use 191 6100 as a gateway for all my users in the land in case if they complain that there is a problem they was not able to access some services on the Internet then I will change the gateway to 200 which is not possible because changing the IP address because already the users will be getting the Iparis through DHCP maybe in the production it works or or changing the IP address and the Gateway even the end users do not have permissions to change their own gateways they might need to restart that pieces to get a new gateway address or they may need to change the IP addresses it's not really possible in the production network changing or switching to gateways by changing the physical gateway addresses is not possible so instead what we are doing is we are going to configure something called H SRP anyway h sr p vr RPG LPP all will do the same job similar job I am going to use these protocols any one of this protocol I I will be using and using this protocol I am NOT going to use this or Gateway I am NOT going to use this gateway instead I am going to configure one virtual gateway so this is your virtual gateway now what your gateway means there is no physical device with this IPO - there is no physical device in the network with that IP so it's a IP address is a combination of both the gateways both the physical gateways okay so I'm going to define it here now once I create this virtual gateway by by using some specific set of commands okay so once I create those things so automatically it is going to make any one route as a primary as a primary gateway so now it depends upon the administrator to decide who should become a primary so let's take an example this is p1 line is using a 10 B years and maybe the ISP to learn is just using two emitters of line so I always recommend and I suggest to use atemi peers line as a primary gateway and again configure ISP tool and as a secondary gateway the meaning of this is primary gateway means all my users so on the land I need to define the Gateway that says 192 168 1.50 now automatically all my traffic will be going why are the primary gateway and in case if something goes wrong with my primary gateway automatically the traffic will be rejected from secondary gateway without the knowledge of end users and users do not really experience any delay maybe in fraction of seconds like H SRP will take converts in fraction of seconds ten seconds so might be 10 seconds the end users will not be able to access internet or access any service on the internet but automatically the traffic will be redirected from seconds again where so this is the concept of HS rpg's redundancy protocols which are going to provide resonance in your production it works by connecting two or more physical gateways acting as a one common gateway now here these two gateways are actually different physical gateways but they are acting as one gateway because at a time one gateway is used and in case if that primary gateway fails automatically the use it is going to shift to alternate gateway but on the inside the these particular users and users will see that they have only one common gateway so they will feel the as if they have only one common gateway but there is no physically there is no gateway present with these circles one 92131 or 50 instead this address is a combination of multiple physical gateway addresses so this is what majorly your these protocols will do like here I can see the same concept I'm going to use here so we are not assigning these gate vectors and we are not assigning this gate rattles these are the actual physical interface gateway addresses where one is going to act as an active router active means primary in HS RP terminology and standby is a backup or secondary we can say we are not going to define these gate resources instead we are going to define the virtual IP address which will be acting as the gateway for all the users in my LAN so using this automatically your traffic will be forwarded through the primary gateway to reach your internet access internet and in case if something goes wrong with these gates where maybe the interface goes down router goes down or the interface connecting to ISP goes on automatically it is going to rewrite the traffic some alternate gateway so the end users will never experience any delay so this is the one of the major concept in your production network because every organization need to have redundancies so companies definitely the preferred energy options and this is the way we can provide a tendency but this is not happen automatically you have to configure some commands in order to have this type of reach ability [Music]

Channel: Sikandar Shaik

Views: 36,273

Keywords: First Hop Redundancy, ccna, ccnp, videos, ccna videos, noa, noa videos, cisco, ccie, subnetting, ccna security, bgp, ospf, firewall, ccna subnetting, ipv6, bgp videos, stp, ccna vdieos, ccna free video, ccie certification, ios, iou, virtual, eigrp, cisco virtual lab, iosv, asav, gns3, routing, noa vdieos, noa solutions, zone based firewall, zone pair, zbf, flsm, cisco firewall, cisco security, cisco certifications, wan, ip addressing, netmetric, vlsm, eigrp configuration, vlan, noa, noa videos, cisco

Id: qoU4P6I5oH8

Length: 16min 23sec (983 seconds)

Published: Tue Jan 24 2017