RIP - Dynamic Routing

[Cosmos]

I did a google on how "RIP" works on routers, I have version 2 on both routers I use and they both have options to allow different directions "out, in, both" etc. Is there any benefit of using this, and if there is; which one should I use for which? I have a dsl router and another router connected to that.

[+BudMan MVC]

Um - do you have routes that you need to let other routers know about? Are you changing/adding networks that are added to the routers frequently?

IF not - then you do not need to be running RIP. In your research of RIP, did you bother to read what it does?

"RIP sends routing-update messages at regular intervals and when the network topology changes. When a router receives a routing update that includes changes to an entry, it updates its routing table to reflect the new route."

For the life of me, I can NOT see how anyone in a home setup such as your would need to be running RIP between their gateway router (one connnected to your inet connection) and your other router. On your gateway router - let see, no matter what routes get added on the net - guess what, your router is still going to be talking to its next hop - your ISP, its only connected interface. It has no need to know anything other than - I need to send my packets to this guy, to go anywhere.

Your routers really do not even have any needs for routing tables, well let see 2 entries - either its is a locally connected machine on one of my for switch ports, or I send it to my other connected networks next hop.

I fail to see why you would even have another network, WHY would you need to be routing inside your home? How exactly would you have need of multiple networks?? On your inside router - are you just using the switch portion, or do you have it connected to the WAN port, are you NATing on it?? WHY?

What are your different networks? If you did not TURN off natting on your inside router, and your say using 192.168.2 - when a machine on that network talks to someone on the internet, its going through NAT twice??

So in a nutshell --> Unless you are changing the network(s) that are connected to your routers. And your too lazy to change it on the other one, etc.. The answer to your question "is ther any benefit" to running this in your setup - NO.

Edit: here is some info that you might find handy -- http://www.cisco.com/univercd/cc/td/doc/ci...ito_doc/rip.htm

Edited October 9, 2004 by BudMan

[MazX_Napalm]

Just use RIP. Normally just a matter of selecting the default that the router offers.

The alternative is OSPF (open shortes path first). But not a lot of "home" routers have them. RIP will work out the best path, OSPF will do what it says. The shortest path may not be the fastest.

[+BudMan MVC]

^ huh??? why exactly would a home user running broadband type switch/routers have ANY use what so ever for ANY routing protocol, be it RIP, RIP2, OSPF, CDP, BGP, IGRP, EIGRP, CLNS, HSRP, etc.. etc..

There is NO need for his routers to pass any type of route information on to any other router, anywhere.

Please give some type of example where this would be needed? Come on - give me one reason why anyone in their right mind would setup anything other than one network behind their HOME dsl/cable modem connection. Do I need to breakup the network for security reasons, too many devices on one net?, geographic location? --> is there some reason why the living room should be on a different network than say the family room?

I mean maybe, just maybe you would break your wireless out and put it on a different network or something. Hey you know what, I am going to put every room in the house on a different freaking network - Still - exactly why would you need to run a dynamic routing protocol?? Are you going to be changing these networks every few days. Are you going to be adding networks??

If the networks/routes to these networks do NOT change - there is just NO reason what so ever to run a routing protocol.

[MazX_Napalm]

I have a Netgear DG834G and it has the following details on RIP:

RIP Direction: RIP (Routing Information Protocol, RFC1058 and RFC1389) allows a Router to exchange routing information with other Routers. The RIP Direction selection controls how the Router sends and receives RIP packets. Both is the default.

When set to Both or Out Only, the Router will broadcast its routing table periodically.

When set to Both or In Only, it will incorporate the RIP information that it receives.

When set to None, it will not send any RIP packets and will ignore any RIP packets received.

RIP Version: This controls the format and the broadcasting method of the RIP packets that the Router sends. (It recognizes both formats when receiving.) By default, this is set for RIP-1.

RIP-1 is universally supported. RIP-1 is probably adequate for most networks, unless you have an unusual network setup.

RIP-2 carries more information. Both RIP-2B and RIP-2M send the routing data in RIP-2 format.

RIP-2B uses subnet broadcasting.

RIP-2M uses multicasting. (See note below.)

Note: Multicasting can reduce the load on non-Router machines because they do not listen to the RIP multicast address and will not receive the RIP packets. However, if one Router uses multicasting, then all Routers on your network must use multicasting.

I just leave it on RIP-1. No need to do anything else. Hopefully this answers your question Cosmos. Like it says:

RIP-1 is probably adequate for most networks, unless you have an unusual network setup.

[+BudMan MVC]

How dense are you MazX?? He does NOT need to be using a routing protocol - what you leave yours on, has NOTHING to do with the fact that you or him have NO need to be using it.

Exactly what other routers do you think your exchanging route info with? Do you even know what a route is? How exactly would you have any reason to exchange any route info with any router anywhere on the planet. If you did - what good would it do?? Are you going to let your ISP's routers know that if they want to get your private network 192.168.x.x they need to talk to your router??? ;)

Your gateway device, ie your broadband router needs to have exactly one entry in its route table - that is to talk to the default gateway provided by your ISP. Any other entries, ie route info is meanless and all it could possible do is SLOW your router down.

Your router needs to know about one route - ie the default route! Guess what you only have ONE connection, no matter what IP address you want to talk to - your router needs to talk to your ISP's router to go anywhere other than your private network.

So what exactly do you believe the running of dynamic routing protocol would provide - if you have the option to TURN it off, that is what you should be doing. Any other setting besides OFF is going to have NO effect, nor in any way could it be helpful to your connection in any way shape or form.

Does not matter if your router has the ability to use it or not - YOU HAVE NO USE for it, and the only logical thing to do with it - is turn it OFF!

edit;

Edited October 9, 2004 by BudMan

[MazX_Napalm]

Just telling him to leave it on the default and that he doesn't need to change it.

I do know what routing is BTW.

I had written a whole lot more, then decided to delete it because I think the question has been answered.

I did a google on how "RIP" works on routers, I have version 2 on both routers I use and they both have options to allow different directions "out, in, both" etc. Is there any benefit of using this, and if there is; which one should I use for which? I have a dsl router and another router connected to that.

Answer:

You don't need to change it. If you want you can disable.

RIP-1 is universally supported. RIP-1 is probably adequate for most networks, unless you have an unusual network setup.

The guy asked what it did and whether there would be any benift of changing.

Why do you see the need to be so course in your replies? You could have just said, "You don't need either, because you don't actually use it. But if in doubt just leave the router default there."

I think that you should learn a bit of diplomacy too.

[+BudMan MVC]

I think that you should learn a bit of diplomacy too.

Thats nice - and your welcome to your opinion, and well thanks for expressing it. Rest assured it will be filed appropriately ;)

As to your understanding of routing - well, I have yet to see that. In your first response, it sure sounds like your telling him to use RIP, and that there is an alternative OSPF. Does not sound like someone that understand routing - Nor doesit seem to let the man know that he does not have any use for dynamic routing protocols in his setup.

Then in your next post, you post some help info from your router - and state that your router supports RIP, and just to leave it on RIP-1. Again not expressing in any way, even the slightest hint to an understanding of the basic concepts of what a routing protocol is or does. Nor in anyway giving an answer to the man's real question - which was is there any benefit to using RIP or RIP2, ie a dynamic routing protocol.

Again in your third post - you post nothing that it any way conveys anything to do with the question, or an anyway displays an understanding of what a routing protocol is used for, etc..

All you did is state what I had been saying - ie, that he has NO use for a routing protocol. And then go on to tell me, that in your opinion my posts seemed rough and or coarse (<--- word I believe you wanted to use) to you.

But you used "course" which well - I fail to understand where you would have a problem with my posts;

a) A systematic or orderly succession; a sequence

b) The route or path taken by something, such as a stream, that moves.

c) A complete body of prescribed studies constituting a curriculum

d) etc...

If my posts seemed like any of these to you - why would I need to learn some diplomacy??? ;)

But whatever tone you read into my posts - well that seems to be your issue, not mine. But to be honest, they might have had a slightly harsh overtone to them. But nothing I would think misplaced --> since if the person had done as they said in the first post - and googled about how RIP works, I fail to understand why they would of been asking the question in the first place.

[mariusu]

all right you two, calm down.

as for you cosmos, i don't see why you would need a routing protocol.

and budman...as far as i know, rip sends updates only at regular intervals (standard timer is 30 seconds for the entire routing table) but not when the network tooplogy changes - this is a feature of link-state routing protocols, and rip is a distance vetor routing protocol. :)

[MazX_Napalm]

Watch out there mariusu BudMan will start correcting you on "tooplogy"

[Premgenius]

Just leave it as default or disable it i agree with all of you.

[mariusu]

Watch out there mariusu BudMan will start correcting you on "tooplogy"

oh sorry, i've just noticed my fault: "topology" and "vector" :)

[+BudMan MVC]

Just leave it as default or disable it i agree with all of you.

Thanks for your support dude! As always you are the rock that keeps me coming back to this place!! I do not know how I would put up with these lusers without you ;)

[dunkin donuts]

oh, now that i've seen this thread that reminds me....

at workwe have T1 connection going thru our firewall and router.

our lan is on 172.19.26.x subnet with gateway being 172.19.26.2

we also have dsl service as a backup inet connection. it's connected using linksys router, which admin page looks exactly like what budman posted above.

if T1 goes down, i want to be able to unplug it and plug in dsl.

however becuase we use different subnet it's not as simple...

reading what little information is included in the help w/ the router it seems like i need to configure "Advanced Routing" feature..however when i configured those settings it still didn't work...

i was wondering if you folks had more detailed explanation of those settings, and/or possibly help me out set this thing up.

[MazX_Napalm]

I do not know how I would put up with these lusers without you

Lusers is a program to list the users logged on to a UNIX system, with various formatting options to control the information reported.

[mariusu]

oh, now that i've seen this thread that reminds me....

at workwe have T1 connection going thru our firewall and router.

our lan is on 172.19.26.x subnet with gateway being 172.19.26.2

we also have dsl service as a backup inet connection. it's connected using linksys router, which admin page looks exactly like what budman posted above.

if T1 goes down, i want to be able to unplug it and plug in dsl.

however becuase we use different subnet it's not as simple...

reading what little information is included in the help w/ the router it seems like i need to configure "Advanced Routing" feature..however when i configured those settings it still didn't work...

i was wondering if you folks had more detailed explanation of those settings, and/or possibly help me out set this thing up.

i think it's a bit complicated and unpractical to plug and unplug cables everytime you have to switch to dsl backup. i would recomend using a router to connect different networks. then the situation will look like this:

you can configure two routes on your router. one route, that goes out your t1 interface. when t1 is functional, everything will be routed that way. now, you'll have to configure another route, out of the dsl interface - set the administrative ditance a bit higher on this route. now, whe everything it's ok, the data will be sent out of the t1 interface. if t1 fails, then, the other route in the routing table (the route for access over dsl) will be used.

i hope you know how to set up routes and dynamic routing on your router. ypu can use almost every routing protocol supported on your router, though i will suggest rip, because it's not so complicated to set up and it's supported by almost every vendor.

hopefully this was not too confusing :whistle:

[Bushrat]

BGP4 pwns all this pin hole stuffs.

[+BudMan MVC]

Lusers is a program to list the users logged on to a UNIX system, with various formatting options to control the information reported.

It is also a word to describe people like you ;)

luser: /loo?zr/, n.

[common] A user; esp. one who is also a loser. (luser and loser are pronounced identically.) This word was coined around 1975 at MIT. Under ITS, when you first walked up to a terminal at MIT and typed Control-Z to get the computer's attention, it printed out some status information, including how many people were already using the computer; it might print ?14 users?, for example. Someone thought it would be a great joke to patch the system to print ?14 losers? instead. There ensued a great controversy, as some of the users didn't particularly want to be called losers to their faces every time they used the computer. For a while several hackers struggled covertly, each changing the message behind the back of the others; any time you logged into the computer it was even money whether it would say ?users? or ?losers?. Finally, someone tried the compromise ?lusers?, and it stuck. Later one of the ITS machines supported luser as a request-for-help command. ITS died the death in mid-1990, except as a museum piece; the usage lives on, however, and the term luser is often seen in program comments and on Usenet. Compare mundane, muggle, newbie, chainik.

Edited October 10, 2004 by BudMan

[mariusu]

budman, sorry, but i totally dislike your attitude. :no:

why don't you just stay on topic and stop picking on other members? :rolleyes:

[+BudMan MVC]

budman, sorry, but i totally dislike your attitude. :no:

why don't you just stay on topic and stop picking on other members? :rolleyes:

Dude -- I was on topic!! Why don't you mind your own business? ;)

[evandarth]

Big headedness. That head just keeps growing huh

[+BudMan MVC]

rip sends updates only at regular intervals (standard timer is 30 seconds for the entire routing table) but not when the network tooplogy changes

???

Routing Updates

RIP sends routing-update messages at regular intervals and when the network topology changes. When a router receives a routing update that includes changes to an entry, it updates its routing table to reflect the new route. The metric value for the path is increased by 1, and the sender is indicated as the next hop. RIP routers maintain only the best route (the route with the lowest metric value) to a destination. After updating its routing table, the router immediately begins transmitting routing updates to inform other network routers of the change. These updates are sent independently of the regularly scheduled updates that RIP routers send.

This is off the Cisco site ---> http://www.cisco.com/univercd/cc/td/doc/ci...ito_doc/rip.htm

Which I linked to on my first post, I have bolded the section that states when the network changes, etc...

[blik]

Just use RIP. Normally just a matter of selecting the default that the router offers.

The alternative is OSPF (open shortes path first). But not a lot of "home" routers have them. RIP will work out the best path, OSPF will do what it says. The shortest path may not be the fastest.

I think you are wrong, doesnt the OSPF algorithm choose the fastest loop free route out of its database. RIP uses the shortest route based on hop count which is inefficient becasue it doesn take cost into account.

[dunkin donuts]

i think it's a bit complicated and unpractical to plug and unplug cables everytime you have to switch to dsl backup.

it's totally not complicated.

i would recomend using a router to connect different networks. then the situation will look like this:

...<snip>

that's not going to happen becuase my managment doesn't want to spend any more money on such things

so i still need some info on "advanced routing" feature in linksys router...

[mariusu]

???

Routing Updates

RIP sends routing-update messages at regular intervals and when the network topology changes. When a router receives a routing update that includes changes to an entry, it updates its routing table to reflect the new route. The metric value for the path is increased by 1, and the sender is indicated as the next hop. RIP routers maintain only the best route (the route with the lowest metric value) to a destination. After updating its routing table, the router immediately begins transmitting routing updates to inform other network routers of the change. These updates are sent independently of the regularly scheduled updates that RIP routers send.

This is off the Cisco site ---> http://www.cisco.com/univercd/cc/td/doc/ci...ito_doc/rip.htm

Which I linked to on my first post, I have bolded the section that states when the network changes, etc...

584706211[/snapback]

yes. you're right on that. but it has not directly to do with the periodically sent routing table updates, but with the holddown timers.

but generally seen, you're right :) - or the cisco site is right :shifty: