How Can Configure Cisco router to PIng all networks.

Posted on 2009-12-29
Last Modified: 2012-05-08
My target is, want to ping
PC0 to PC1,
PC1 to PC0,
PC0 to PC21,
PC21 to PC0


In Pic I have two (Locations or Cities, Jeddah and Riyadh).
Blue Color = Jeddah
Red Color = Riyadh

Right Now, In Pic1  there is No PC0. So I can Ping,
PC1 to PC21,
PC21 to PC1,
Note: this is for your information, you can see in Jeddah Router2800 there is IP route this is because user can use Internet because is our Internet. And other Ip route is for VPN Client which is ip route which is working fine from Outeside.

Now In Pic2 I have add one router 1800 series + BCM450 for IP telephony + PC0 + small link sys switch.
You can see Router 1800 series IP which is F0/0: and F0/1:, and My BCM450 IP is
Now I cannot Ping from
PC0 to PC1,
PC1 to PC0,
PC0 to PC21,
PC21 to PC0

Then you can see in in Pic3 What I did In Jeddah Router 2800.
I have delete ip route and I added Ip route

Then In router 1800 Series,
I have added IP route

Now I can Ping,
PC0 to PC1,
PC1 to PC0,
PC1 to PC21,
PC21 to PC1
But I can not Ping,
PC0 to PC21,
PC21 to PC0

Now I want  to know what should I do then I can Ping
PC0 to PC21,
PC21, to PC0
and other all should be ping able to each other  (which is already Ping able to each other)

Question by:shariqsaeed
    LVL 23

    Accepted Solution

    Following your diagram. the 1800 series only know about local routes because it points all traffic to your ISA ( If the ISA does not have a route to the Riyadh network then it will not know what to do with the traffic.
    So if you still want all the traffic to go through the ISA then add a route in the ISA to send traffic for the Riyadh network to the 2800. The 2800 will then pass the traffic over to the Riyadh network.
    OR you could just add another static route to the 1800 that points all trffic for Riyadh network to the 2800. But this traffic will not pass through the ISA.

    Author Comment

    Well, thanks but can you tell me how i can route in 1800 point to all traffic for Riyadh Network to the 2800? without pass through the ISA?
    LVL 23

    Expert Comment

    Ok let me see if i understand how your traffic is flowing.
    From your BGP config on the 2800s the network is not being advertised through the Jeddah 2800 also it looks like the two 2800s are not peering with BGP. is this correct? run "show ip bgp summary" to verify
    Since your 2800s are not peering Your routes on the Jeddah 2800 point all traffic to the 1800 (because of the default route). The 1800 in turn point all traffic to the ISA (because of the default route). I would then assume the ISA sends all traffic out to the local ISP. Is this correct? Run a trace route from PC1 to PC21 to see the actual path taken.
    Is all this correct or am i looking at it wrong?
    How do you want the traffic to flow between the two? through the ISA or through the 2800s?

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    How your wiki can always stay up-to-date

    Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
    - Increase transparency
    - Onboard new hires faster
    - Access from mobile/offline

    Suggested Solutions

    Problem Description:   Couple of months ago we upgraded the ADSL line at our branch office from Home to Business line. The purpose of transforming the service to have static public IP’s. We were in need for public IP’s to publish our web resour…
    Quality of Service (QoS) options are nearly endless when it comes to networks today. This article is merely one example of how it can be handled in a hub-n-spoke design using a 3-tier configuration.
    After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
    After creating this article (, I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

    759 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    11 Experts available now in Live!

    Get 1:1 Help Now