Solved: routing protocols

klumeka1122 · ‎06-21-2007

I'm preparing for my CCNA exam and just found two different answers from a question below, could you please tell me what is the correct one...

Q- A network with 15 hosts has one connection to the internet through the R1 route. What routing are recommended in the R1 and ISP router?

From two different books I got the answer

1. A default route on R1 and static route on the ISP router

2.A default route on both routers.

Please can you advise what is the correct one?

guruprasadr · ‎06-21-2007

HI,

I accept to Mohammed Mahmoud answers. Answer "1" is the Correct.

Sorry, i mis-understood the question.

Default Route from R1 to pass all traffic to ISP Network

Static Route from ISP side to R1 for routing back the return Packets.

Pls Rate if Helps

Best Regards,

Guru Prasad R

View solution in original post

smothuku · ‎06-21-2007

Hi ,

First is the correct answer becoz ISP may be connected to different locations other than R1 ...so Statis route must be configured on ISP router.

R1 dosen't know about the networks or destinations to reach within or beyond the ISP ...so a default route pointing towards serial ip of ISP is needed on R1 router.

hosts----R1------------ISP

deafult route---> <---static route

Thanks,

Satish

View solution in original post

guruprasadr · ‎06-21-2007

HI, [PLS Rate if HELPS]

Your Study Setup is this way:

--------|

15 Hosts|---Switch---R1---ISP Router

--------|

2. Default Route on Both Routers

from Switch----Default Route----to R1

from R1----Default Route----to ISP Router

PLS Rate if HELPS

Best Regards,

Guru Prasad R

mohammedmahmoud · ‎06-21-2007

Hi,

Answer 1 is the correct one, R1 (CE router) needs a default route to forward all traffic to the ISP, and the ISP router should just have a static route routing back the packets destinated to the LAN connected to R1 back to R1.

A default route at the ISP is a wrong answer, it must be a specific route for the LAN of R1.

HTH, please do rate all helpful replies,

Mohammed Mahmoud.

guruprasadr · ‎06-21-2007

HI,

I accept to Mohammed Mahmoud answers. Answer "1" is the Correct.

Sorry, i mis-understood the question.

Default Route from R1 to pass all traffic to ISP Network

Static Route from ISP side to R1 for routing back the return Packets.

Pls Rate if Helps

Best Regards,

Guru Prasad R

smothuku · ‎06-21-2007

Hi ,

First is the correct answer becoz ISP may be connected to different locations other than R1 ...so Statis route must be configured on ISP router.

R1 dosen't know about the networks or destinations to reach within or beyond the ISP ...so a default route pointing towards serial ip of ISP is needed on R1 router.

hosts----R1------------ISP

deafult route---> <---static route

Thanks,

Satish