ping of router fails with linux-2.6.20.x kernel inspite of getting IP address

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ping of router fails with linux-2.6.20.x kernel inspite of getting IP address

Subject: ping of router fails with linux-2.6.20.x kernel inspite of getting IP address Author: nil Posted: 2007-03-24 21:28:53 Length: 1,310 byte(s)
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This is an unusual problem that I have been facing with my compiled-from-source kernel (applicable to both versions 2.6.20.3/4 from http://www.kernel.org). I compiled and installed this vanilla-kernel on my OS (Linux mandriva 2007.0). My setup includes a linksys router and DSLmodem. Here's the problem: 1) If my machine is connected directly to the DSL modem then it can successfully ping the IP address of the ISP server (to which the DSL modem is connected at the far end). 2) If my machine is connected to the router (which in turn is connected to the DSL modem) then it cannot ping the internal IP address (192.168.1.1) of the router. The ping command reports 100% packet loss. Needless to say, my machine cannot access the internet. Note that in both cases my machine gets a legitimate IP address via DHCP, as shown by ifconfig. Also, commands like "route -en" do indicate proper routes (however, "netstat -r" hangs in the 2nd case). The above problem is true for only for the 2.6.20.x kernel I compiled from source. The mandriva 2007.0 OS itself comes with its own kernel (2.6.17) which has none of these problems. Also, other machines connected to the router can access the internet just fine. Any trouble-shooting advice is welcome.
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Subject: Re: ping of router fails with linux-2.6.20.x kernel inspite of getting IP addres Author: tlcoffee Posted: 2007-03-24 21:41:28 Length: 237 byte(s)
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Try changing the subnet of your dhcp assigned ip addresses in your router. Your DSL modem is gonna assign your router an internal ip which is probably conflicting with your routers internal ip address assignments.
---- Aut viam inveniam aut faciam. #include <stdio.h> int main(void) { int count; for(count=1;count<=500;count++) printf("I will not backtalk my boss."); return 0; }
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Subject: Re: ping of router fails with linux-2.6.20.x kernel inspite of getting IP address Author: nil Posted: 2007-03-25 12:32:10 Length: 970 byte(s)
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Quote from: tlcoffee Your DSL modem is gonna assign your router an internal ip which is probably conflicting with your routers internal ip address assignments. I think you meant "Your DSL modem is gonna assign your router an external ip". I have verified that there is no conflict between internal and external IPs. If there had been then my network connection will not work for any of the kernels I use. If you refer to my original post, you will notice that the ping problem is there for for a particular kernel and its obvious that the external or internal IP address of the router does not depend on the kernel version of one of the client machines connected to the router. Quote Try changing the subnet of your dhcp assigned ip addresses in your router. Why would that help for a specifc kernel version?
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Subject: Re: ping of router fails with linux-2.6.20.x kernel inspite of getting IP addres Author: tlcoffee Posted: 2007-03-25 14:04:19 Length: 722 byte(s)
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pardon me didn't mean to offend you there dewd. i just scanned the post. since your router is getting an internal ip address assigned to it by the cable modem AND then in turn assigns internal ip addresses to your home network, i just figured that a there would be a conflict there. but your right. you did say that it worked properly with a seperate kernel. and since you decided to point out that this is a kernel problem then don't you think this post should have been made in the kernel support forum instead of network support since its specifically a problem with the kernel you compiled. also when compiling your kernel make oldconfig is your friend.
---- Aut viam inveniam aut faciam. #include <stdio.h> int main(void) { int count; for(count=1;count<=500;count++) printf("I will not backtalk my boss."); return 0; }
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Subject: Re: ping of router fails with linux-2.6.20.x kernel inspite of getting IP address Author: nil Posted: 2007-03-25 22:58:45 Length: 1,095 byte(s)
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Quote since your router is getting an internal ip address assigned to it by the cable modem Actually, whatever address the ISP server assigns (via the modem) to the router is the router's "external" IP address but thats not relevant to the main issue. Quote and since you decided to point out that this is a kernel problem then don't you think this post should have been made in the kernel support forum instead of network support since its specifically a problem with the kernel you compiled. We don't know yet whether the problem is with the kernel or some other networking-related system/config files that don't work with newer (2.6.20.x) kernels. Quote also when compiling your kernel make oldconfig is your friend. I have tried various combinations (reusing an old .config and also creating a new one from scratch) but the problem of ping not responding has always been there.
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Subject: Re: ping of router fails with linux-2.6.20.x kernel inspite of getting IP addres Author: ashirbad Posted: 2007-04-11 10:49:48 Length: 391 byte(s)
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Ur problem is with the kernel which is not supporting ur router but the DSL modem is supported by mostof the kernel so try to install the driver it may be absent. Just try to detect and check whether it's working or not this problem arises with new kernel
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