routing

Answered Question
Sep 18th, 2009
User Badges:

Hi,


I have three routers connected like A-b-c now A is running ospf and c is running eigrp and B is running both ospf and eigrp. Now I have ospf routes of router A in router B and then redistributed to rotuer C.


I got those routes in Router C but I am not able to ping those network from C


Any suggestions.


Thanks

Hemant

Correct Answer by Lucien Avramov about 7 years 6 months ago

What do you mean by reach? You dont want someone behind router A to reach router C?


Then you need to configure an access-list on router A.

Correct Answer by Edison Ortiz about 7 years 6 months ago

You need to redistribute in both routing protocols - from OSPF into EIGRP and EIGRP into OSPF on Router B.


__


Edison.

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 4 (3 ratings)
Loading.
Correct Answer
Edison Ortiz Fri, 09/18/2009 - 12:43
User Badges:
  • Super Bronze, 10000 points or more
  • Hall of Fame,

    Founding Member

You need to redistribute in both routing protocols - from OSPF into EIGRP and EIGRP into OSPF on Router B.


__


Edison.

sharma16031981 Fri, 09/18/2009 - 12:49
User Badges:

Thanks Edison !!!


Is it possible to configure that I only need that router C can reach all networks on router A. not vice-versa


or if I am able to see the route in sh ip route of router C then I will be able ping those network or not.

Lucien Avramov Fri, 09/18/2009 - 13:22
User Badges:
  • Red, 2250 points or more

For router A to reach all the networks on Router C, Router C will have to know how to get back to router A.


If you see the route in the show ip route it does NOT mean you will be able to ping always. It means the router knows in his his table how to reach a certain network via an interface or ip address of gateway. To Ping you need two way communication. You may be able to reach the other end, but the other end will need to reach the source you pinged back. And that involves that the other end router needs to have a route back.


sharma16031981 Fri, 09/18/2009 - 13:32
User Badges:

Thanks !!!


Now they are ping each other but what if I want only router C can reach all the networks of router A but not vice-versa

Correct Answer
Lucien Avramov Fri, 09/18/2009 - 13:38
User Badges:
  • Red, 2250 points or more

What do you mean by reach? You dont want someone behind router A to reach router C?


Then you need to configure an access-list on router A.

sharma16031981 Fri, 09/18/2009 - 13:47
User Badges:

So if I am applying access list on router A then source would be network connected to router A and destination would be networks connected on router C.


And will be applied on interface connecting to router C with IN

Actions

This Discussion