0
votes
1answer
54 views

Clients losing stateless ipv6 addresses

I'm having problems with Linux VM's at a certain VPS hoster. Periodically the hosts lose their ipv6 address. They go to 'deprecated' and then disappear completely. On the client side I have checked ...
4
votes
3answers
233 views

In Linux, how can I automatically assign an IPv6 address to an interface based upon its IPv4 address at boot time?

On a CentOS 6 machine, I have a server with 2 NICs, eth0 and eth1. eth0 has address 192.168.0.1. I would like to create a script that parses the IP address of eth0 and assigns a similar-looking IPv6 ...
1
vote
1answer
392 views

Adding a whole IPv6 /64 block to an network interface on debian

I tried adding a whole IPv6 (/64) block to an interface using ip route add local 2001:41d0:2:ad64::/64 dev lo like described here on my Debian server, but I seem to be missing something. If I ping ...
0
votes
0answers
72 views

Couldn't load target `DNAT':No such file or directory

Trying to do some ipv6 nat and running into an error from ip6tables $ip6tables -t nat -N IPV6-BRIDGE $ip6tables -t nat -A PREROUTING -p all -d 2600:3c01::f03c:91ff:fe6e:2563 -j IPV6-BRIDGE $ip6tables ...
3
votes
1answer
217 views

How to ping ipv6 interface

I'm trying to get familiar with ipv6 I don't understand why I can't ping this interface at the inet6 addr eth1 Link encap:Ethernet HWaddr 08:00:27:77:9e:77 inet addr:192.168.33.10 ...
2
votes
1answer
148 views

Automatically acquire IPV6 address in CentOS 6

The network has fixed IPv4 address, and automatic acquired IPv6 address. Does anyone have an idea how to setup? Thanks a lot! I didn't use NetworkManager. The following is my setting, but it does not ...
1
vote
1answer
231 views

how to configure static ipv6 and additional ipv6 with same vlan?

I'm having trouble with configuration static ipv6 address and additonal ipv6 on same interface(eth4). static ipv6 configuraiton issue firstly, I configure below vi /etc/network/interfaces auto ...
3
votes
1answer
479 views

Debian 7 how are IPv6 link local addresses set?

It seems like when dhclient runs on eth0 I get an IPv4 address from the DHCP server and a Scope:Link IPv6 address attached to eth0: inet6 addr: fe80::a00:27ff:fed0:4d41/64 Scope:Link But I can't ...
2
votes
1answer
479 views

CentOS, ifdown on virtual interface removes IPv6 addresses on physical interface

In CentOS 6.4, when using 'ifdown' on a virtual interface, the IPv6 addresses configured on the physical interface are also removed. I expect only the virtual interface to be changed. How can I ...
0
votes
4answers
3k views

IPv6 only works after pinging the default gateway.

We now have 2013 and I thought it is long overdue to activate IPv6 on my server. But unfortunately, I ran in some problems. To be honest I only have litte experience with IPv6 So I hope you can help ...
3
votes
1answer
171 views

ip command vs route command, what's the difference?

I see both ip and route commands used for configuring the kernel routing tables. What's the difference? It seems to me that the ip command is preferred more. Is it so, and why?
0
votes
1answer
177 views

IPV6: two interfaces with dhclient

I have eth0, eth1. For each interface run dhclient on default port 546 (547 ?). eth1 does not have connection to the network. If dhclient for eth0 bounds before dhclient eth2 starts the eth0 gets IP. ...
1
vote
1answer
714 views

Linux & IPv6: How to bind to an arbitrary IPv6 address? [duplicate]

Possible Duplicate: Can I bind a (large) block of addresses to an interface? I have a /48 IPv6 block. I'd like to be able to do this: $ wget --bind-address=<1st-ipv6> ...
1
vote
1answer
612 views

Virtual IPv6 Network between VirtualBox VMs

I'm trying to create a virtual IPv6 network as a test environment. I have 5 VirtualBox VMs (Ubuntu Server) with network adapters using host-only networking. You can imagine them being connected in ...
1
vote
1answer
236 views

IPv6-“GARP”/ Gratuitous ND

I am maintaining an office network with several VLANs. These VLANs are terminated by a redundant pair of Linux boxes as router. Between those I am running VRRP (with keepalived). On failure I am ...
0
votes
2answers
968 views

Hosting websites on a public ip routed via a private subnet using one Linux machine as both router and server

I use Ubuntu server as router, NATing router and webserver. The server is connected to ISP with a public /29 subnet. Also I host some important websites on it. I asked the ISP to provide ipv6 address ...
3
votes
1answer
825 views

Configure IPv6 routing

I've got IPv6 addresses from SIXXS. My host is connected with SIXXS network over a AICCU tunnel ("sixxs" interface). My host address is 2001:::2, the host on the end has address 2001:::1. On my host ...
1
vote
0answers
509 views

why ping6 fails if tcpdump shows ICMP6 request/reply traffic?

I'm having a very strange problem with IPv6 pings on OpenWRT (fon-ng firmware with IPv6 enabled) and hoping someone can help with investigation. In short - wpan0 interface with address aaaa::1/64 is ...
1
vote
0answers
186 views

Attempting to DNS resolve / relay an IPv6 address for a host

I have a network switch doing IPv6 DNS relay to a Linux box (3.0.4-gentoo #7). The packets (DNS request) are arriving fine at the Linux box. Where I'm stuck now is how to resolve those, either by ...
1
vote
1answer
298 views

IPv6 MTU and MSS ignored in LAN?

I have a server with a (sixxs) IPv6 tunnel and a local network behind it. The tunnel has MTU of 1470, and a prefix with this MTU is advertised by radvd, and picked up by the local client: ...
2
votes
2answers
404 views

Linux does not get IPv6 default gateway from Cisco ASA5510 on autoconf

My ASA 5510 has the following configuration for an interface. My Ubuntu box (2.6.35) connected to this network will correctly autoconf an IPv6 address, but it will not set a default route. interface ...
2
votes
2answers
863 views

IPv6 configuration SIOCSIFADDR file exist

I am configuring IPv6 address in a Debian machine, and this is what I have in my interface file. auto eth0 iface eth0 inet6 static pre-up modprobe ipv6 address 2001:23:207:141:0:0:0:0 ...
1
vote
1answer
282 views

ping6 overhead compared to ping overhead

I am testing IPv6 latency from a Linux box, and I noticed this weird difference between IPv4 ping and IPv6 ping: # ping -n -A -q -c 500 speedtest.steffann.nl PING speedtest.steffann.nl (10.3.10.20) ...
1
vote
0answers
629 views

I am not able to ping the IPv6 address asigned to the interface on CentOS 5

I have assigned a stativ IPv6 address to eth2 interface and I am not able to ping it. Here is the configuration setup done in /etc/sysconfig/networking/device/ifcfg-eh2 # Intel Corporation 82546EB ...
5
votes
1answer
359 views

IPv6 and NAT, routing to multiple ISPs

Currently I have a nice setup using private IPv4 address space and uplinks from two ISPs to the Internet. Thanks to NAT I can just take down one of the interfaces and the Internet access is still ...
0
votes
1answer
200 views

iproute2 tunnel sit

According to this article http://www.consulintel.euro6ix.org/ietf/draft-palet-v6ops-6in4-vs-6over4-01.html 6in4 is only encapsulation mechanism that is used by transition mechanisms like 6over4. What ...
5
votes
3answers
2k views

How to completely disable IPv4 stack from Linux?

How can I disable IPv4 stack from Linux ? I want to do that dynamically, ie. sometimes I want it enabled and sometimes I want only IPv6 stack. Is there any portable way to do that ? If you know how to ...
1
vote
1answer
586 views

Implementing IPv6 Anycast

I'm trying to create a small IPv6 anycast network with 4 PC's [running CentOs 5.0, and called PC1-PC4] and two Cisco 2800 series routers. The setup is this: PC1,PC2 will be on the subnet 2001::0/127 ...
2
votes
2answers
835 views

Linux IPv6 loopback routes getting automatically added

We have a router running Debian Lenny that has been happily routing IPv6 for several months. Our upstream has advised that our address range is changing, and both are currently operational, so I ...
4
votes
3answers
283 views

Access server via IP v6?

Question: I'm playing with IPv6 and converting it to IPv4 and vice-versa. I wanted to access http://127.0.0.1/ And did the standard ipv4 to ipv6 calculation: AA = 127 BB = 0 CC = 0 DD = 1 with the ...