Lecture 2 - Static Routes Fundamentals

NOTE: This is a hub and spoke topology over FRAME RELAY, (R1 is the hub)

Lets see if we can ping the loopback interface of R2 from R3, no it fails,

I have enabled Debug IP packet (handy to use, but use WITH CAUTION lol)

We have no route to the network, lets fix that with a static route to R1 (as this is the hub)

Lets test the next hop address is reachable (R1 -123.1) yes i can [ping it, lets try R2's loopback

Ah, seen that before! looks like we are getting timeouts and unreachables .... WHY, because we know how to get to R1 (our next hop) but R1 does not know how to get to 2.2.2.2

IT IS NOT ENOUGH TO JUST CONFIGURE THE LOCAL ROUTER WITH STATIC ROUTING, YOU NEED TO ENSURE ALL DOWNSTREAM ROUTERS KNOW HOW TO GET TO THE NETWORK ALSO

Static routing peeps ..... gotta lurve it lol

To confirm, here is R1's routing table

Lets enable the debug on R3 again and confirm what is happening with the packets .....

So we can see the packets are now leaving R3, whereas before they were not (here is the debug on R1, notice the sending and receiving)

Can we ping R2's loopback interface ........ no

Lets get a static route configured here;

kooolio, sorted. notice the Source IP of 2.2.2.2 coming back to us... :0)

Also remember if RIP were running on the serial links, it would see this as 1 HOP away, same as the route over the ethernet segment and would load balance, if for the above reasons we would not want this to happen, so .....

Lets look at this on the next vid,

Work ordered the trainsignal CCNP bundle i have been nagging them about :o)
So lets get started:

TRAINSIGNAL

Lecture 1 - Routing fundamentals

Lets start with a quick recap of RIP



RIP v1
Broadcasts every 30 seconds
Classful, does not recognise VLSM, update carries FULL routing table
Equal-cost load sharing by default
Max hop count 15
No routing authentication
Uses Bellman-Ford algorithm
updates carry 25 routes MAX


RIP v2
Multicast every 30 seconds to 224.0.0.9
Classless, Supports VLSM, update carries FULL routing table
Equal-cost load sharing by default
Max hop count 15
Supports routing authentication (clear text & MD5)
Uses Bellman-Ford algorithm
updates carry 25 routes MAX



In a larger network, another problem arises. RIP routing updates can hold a max of 25 routes, so if there are 105 routes in your, network, that is 5 update packets would be needed! since they go out every 30 secs, whether anything had actually changed in the network, RIP is generally a poor choice for a WAN protocol!

Another reason you dont see DV (Distance Vector) protocols used on WANs very often is their method of determining the best path.  Both versions of RIP only understand hop count .... On a LAN this hop count is not too much of an issue, but RIPs limiatations quickly become a problem on a WAN

RIP see's these as all equal links and will begin equal-cost load balancing over them ..... :0(, not good for todays delay sensitive networks!

EIGRP

Multicasts to 224.0.0.10
Sends entire routing table only when the adjacency is first formed
Sends only routing update after that when necessary, update reflects only the changes
Uses DUAL routing algorithm
Equal-cost load sharing by default, unequal-cost load sharinh configured with the variance command

Recap of AD Values:

Directly Connected route / Static route: 0
Static route with next-hop IP address: 1
EIGRP-Summary: 5
External BGP: 20
Internal EIGRP: 90
OSPF: 110
RIP: 120
External EIGRP: 170
Internal BGP: 200
unknown network: 255

Note taking all day, one thing i have missed off is a few BGP Labs, so will get round to these when i hit labbing hard next week.

Things to do:
Order ROUTE 642-902 Official Certification Guide
Order Train Signal - CBT
Come end of month, book exam for beginning/Mid June ;0)
Plan/print Lab module and tasks ...

post it note

Need to buy:


 Cisco IP Routing (ROUTE) Foundation Learning Guide: Foundation Learning for the ROUTE 642-902

Study Notes....

Spent the evening finalising/tidying up my EIGRP study notes, took alot longer than i thought it would do! ...still got all the other sections to do ...... the plan. complete before the weekend is out.

PLAN OF ACTION


Had a week off to have break and get my boxing training sorted (plus half term for kids)

Plan of action is now the CBT is complete (CBT Nuggets) im going to go through my notes, ideas, concepts etc and dump it all down in my trusty notepad, key points and theory

Then next, we move onto the CCNP Route Lab Companion book and start labbing like no ones business!

IPv6 Routing - Transitioning to IPv6 and Certification Review

IPv6 Transition Strategies

3 most popular methods to moving/transitioning to IPv6, these cater for pretty much everything.
This technology is:

DUAL-STACK ROUTERS
TUNNELING (6to4 and 4to6)
NAT PROTOCOL TRANSLATION


DUAL-STACK ROUTERS

 This is where you could have both IPv4 and IPv6 on your network (maybe on the same interface or seperate interface/vlan) and most probably your ISP would send you both IPv4 and IPv6 routes (or you could 2 providers one doing each .....)


TUNNELING (6to4 and 4to6)

 You could just tunnel your way through lol, using good ole GRE tunnels you could go IPv4 through the IPv6 network to your IPv4 end point network ... job done :0)


NAT PROTOCOL TRANSLATION

 Good ole NAT, this is your show ip nat translations job, literally IPv4 ---> IPv6 or vice versa (instead of private to public lol)

So if we take everything on board we have several ways to transist to IPv6, its not a Y2K do it or die approach lol!

Cisco Route Exam Review

 Pass score changes all the time as we know, but bottom line .... you really need to know what your doing and also how to think outside the box along with all the base config/theory




Sweeet, that is the last nugget in the series completed!!! all done .... time to go go over all the theory and get labbing!!!