No reply to NDP request from Linux host Post: 302833215

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Special Forums IP Networking No reply to NDP request from Linux host Post 302833215 by SavLou on Tuesday 16th of July 2013 01:26:49 PM

07-16-2013

Registered User

No reply to NDP request from Linux host

Hi, new here.

We are attempting to prove that an application will be able to carry IPv6. All is fine with IPv4 but not so much with IPv6. For now, we're just starting to ping between hosts to ensure basic communication.

I'll try to put as much info but of course feel free to ask for more.

Ping from Linux to Windows host:
NDP request is sent out, Window replies. Ping goes out. All is good.

Ping from Windows to Linux host:
NDP request is sent from Windows but linux host does not reply. We're stuck

Ping from Linux to Linux host:
NDP request is sent but linux host does not reply. We're stuck

So it might be as simple as a few kernel options we missed but we cannot figure which one. We are using Kernel 2.6.24. Yes, it is old. But nothing we've read seems to indicated that it cannot work on 2.6.24.

Any insight appreciated.

Lou

SavLou

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ssmping

ssmping(1)						      General Commands Manual							ssmping(1)

NAME

       ssmping - check if you can receive IPv4/IPv6 multicast data from an internet host

SYNOPSIS

       ssmping [ -46v ] [ -I interface ] [ -c count ] [ -s size ] host

       ssmpingd

DESCRIPTION

       ssmping	and  ssmpingd are network level multicast management tools that can be used to check whether one can receive multicast packets via
       SSM from a host.  The host target given to ssmping must run the ssmpingd daemon, which listens on UDP port 4321 for IPv4 and  IPv6  unicast
       requests.   When it receives one, it responds to a well known SSM multicast group which ssmping just have joined.  Depending on whether the
       request was made with IPv4 or IPv6, the group is 232.43.211.234 or ff3e::4321:1234 respectively.

OPTIONS

       For ssmpingd there are no options.  For ssmping the options are as follows.

       -4     Force IPv4

       -6     Force IPv6

       -v     Print client and server version information.

       -I interface
	      Interface to join on

       -c count
	      Stop after sending (and receiving) count requests (and replies)

       -s size
	      Request replies to have a size of size bytes

SEE ALSO

       asmping(1) a tool for checking whether can receive ASM.

       dbeacon(1) a distributed beacon multicast implementation.

BUGS

       Please report them to Stig Venaas <venaas@uninett.no>, the author of this tool.

HISTORY

       ssmping and ssmpingd were developed by Stig Venaas during the early days of the m6bone, the IPv6 multicast backbone.

								   User Manuals 							ssmping(1)