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Need Neighbour Discovery rpm for IPV6

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I need neighbour discovery rpm for IPV6 on CentOS 6.2 any pointer. Actually I am able to find out RHEL 5/CentOS 5 but could not locate CentOS 6 compatible RPM.

posted Apr 16, 2013 by Salil Agrawal

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what rpm is that ? neighbour discovery is a feature of the underlaying network stack and justworks in ipv6
It is important to understand that neighbor discovery depends oncertain IPV6 ping packets not being blocked towork correctly.

1 Answer

0 votes

I got the link to download, following is the link -
http://pkgs.org/centos-6-rhel-6/epel-x86_64/ndisc6-1.0.1-1.el6.x86_64.rpm.html

answer Apr 17, 2013 by Salil Agrawal
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I have a kvm host and I try to install a centos 6 guest with a static ip address.

When I do a manual install I eventually get to the network configuration and if I enter IP, gateway and DNS Server I can ping6 the guest from the host and I can ping6 the guest from outside.

I do not want to do manual installation, so I have to specify a url to a kickstart file, but to download it the network must be configured. I try some kernel options

noipv4 ipv6=... gateway=... dns=... ks=http…

This gets me so far that I can ping6 the guest from the host, but I can not reach it from outside. When I ping from outside I see the guest sending neighbor solicitation requests for the IP I ping from, but this IP is in another network. I think the guest does not get a gateway configured. At least the ipv6 option is working, because I can ping the guest from the host.

How do I achieve such a ipv6 only with static network configuration kickstart install? How to specify ipv6 gateway (and possibly dns)

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I have a process which is running as a linux service and assigns IP addresses using netlink to configued interface in linux.
For IPv4 addresses i do not see any issue with this assignment.

When i try to assign an IPv6 address, the address gets assigned successfully to the interface, but the Neighbour Solication request received for that address is not responded with and hence ping6 from a different machine doesn't work.

When i take the same netlink code and run it in a sample program the address gets assigned and the Neighbour solicitation is responded with a advertisement and hence ping6 works.

IP assigned by the program : 7000::15/32
IP on client machine from where ping6 is done : 7000::17/32.

Bot machines are connected to same Layer-2 switch.

I have flushed the ip6tables on both the machines just to rule out any firewall issues.


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