Re: newbie at routing

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Diana Asnani wrote:
Hi,

its Diana again...after setting "route add -net 202.184.41.0/24 gw 192.168.202.14", i still could not ping 202.184.41.41 ( the PC )....i could ping the 202.184.41.0 add i also set the "route add -net 202.184.41.0/24 gw 192.168.206.1" but it says network unreachable....


Lets try to analyze what information regarding your network setup, you gave till now (from all your e-Mails).

First e-Mail:
^^^^^^^^^^^^^^^

I need help!! My VLAN IP is 192.168.202.1. I can ping another PC with the VLAN IP of 192.168.206.1 but i can't ping the 202.184.41.41 address in that PC. Am i supposed to do some sort of routing configuration? I am using FC3 as my OS. What am i supposed to do to ping 202.184.41.41? Thanks

At least from my point of view, your network setup at this stage looks like:

    1st PC                                             2nd PC
[192.168.202.1]<------------------------>[192.168.206.1 | 202.184.41.41]

You have two PCs:
 - first one configured with an IP address of 192.168.202.1
 - second one with two IP addresses - 192.168.206.1 and 202.184.41.41

You said packets are able to travel between end 192.168.202.1 and end 192.168.206.1. In order this to be able to work, both ends need to be located on a same subnet (like 192.168.0.0/16) ... OR ... in two different subnets, while both ends have an explicit routing entry for reaching each other.


Second e-Mail:
^^^^^^^^^^^^^^^

yup 202.184.41.41 is configured in the same PC as 192.168.206.1
the subnet mask is 255.255.255.240

The new info is that either 202.184.41.41 or 192.168.206.1, is inside a subnet with net mask 255.255.255.240:

So one of the subnets below sure exists:

202.184.41.32/255.255.255.240
192.168.206.0/255.255.255.240


Third e-Mail:
^^^^^^^^^^^^^^^

thanks for the reply...the gateway for my 192.168.202.1 PC is 192.168.202.14 which is the vlan router which enables me to ping the 192.168.206.1 vlan address...for the route in the network device control, the destination network is 192.168.206.0, the subnet mask 255.255.255.240 and the gateway as 192.168.202.14...this is what i have done so far...i am not too sure on how i should configure a default gateway ot static route...

Now, there is a new player in the picture - 1st PC's (probably default) Gateway/router which has an IP address 192.168.202.14 and some kind of link to 192.168.206.1.


    1st PC                                             2nd PC
[192.168.202.1]                          [192.168.206.1 | 202.184.41.41]
    |                Gateway                 |
    +---[192.168.202.14 | ???.???.???.???]---+

Good thing is that one of the subnets is clear now - 192.168.206.0/255.255.255.240

The bad thing - it is not clear how Gateway is able to route packets from 192.168.202.1 to 192.168.206.1. Probably Gateway has a second interface within the subnet of 192.168.206.1 ... OR ... both Gateway and 2nd PC are directly connected while using explicit routes?

Not clear is also what you mean by: "...for the route in the network device control, the destination network is 192.168.206.0, the subnet mask 255.255.255.240 and the gateway as 192.168.202.14...".



Fourth e-Mail:
^^^^^^^^^^^^^^^

no, the VLANs are not connected to the same router...the vlan router for 192.168.206.1 is 192.168.206.14
the router is Cisco...

Okey, it is getting worse. You are sure that 192.168.202.1 and 192.168.206.1 (what I understand by "the VLANs") are not connected to the same router. The picture looks completely different now:

    1st PC                                             2nd PC
[192.168.202.1]                          [192.168.206.1 | 202.184.41.41]
    |     Router 1            Router 2       |
    +--[192.168.202.14] ?? [192.168.206.14]--+


My questions are: Is the last schema matching your network topology? If true, how are Router 1 and Router 2 connected with each other? If not, could you try to write a simple schema description as the ones from above?







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