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Ticket ID: SIXXS #4960613 Ticket Status: User PoP: iedub02 - Digiweb Limited (Dublin)
Intermittent tunnel
![[ie]](/s/countries/ie.gif) Carmen Sandiego on Thursday, 16 June 2011 17:53:30
Good evening,
I'm having an issue with my tunnel.
my detail are below:
Tunnel Information for T63745
Your Location Dublin, Ireland Ireland
Your IPv4 Static
IPv6 Prefix2a00:15b8:100:e::1/64
PoP IPv6 2a00:15b8:100:e::1
Your IPv6 2a00:15b8:100:e::2
Created 2011-04-20 17:05:08 CEST
Last Alive 2011-06-16 14:27:21 CEST
State Enabled
I have a cisco 1841 as IPV6 gateway. I' starting the tunnel behid NAT so from a private lan to the outside word. It was working fine with a linux box (OpenWRT) and Samsung Router (Ubigate2006). I'm using the same setup and network the But currently the tunnel is bouncing. I don't know if it is a Cisco problem or a tunnel problem.
My scenario is IPv6 LAN----- Cisco 10.1.10.223/16 ------ 10.1.1.30 Office gateway 62.77.191.193 (NAT)------- 212.126.37.76 SixxS POP IPv6
My Cisco config is
!
interface FastEthernet0/0
ip address 10.1.10.223 255.255.0.0
duplex auto
speed auto
ipv6 address 2A00:15B8:10D:A:2006::1/64
ipv6 ospf 1 area 0
!
!
interface Tunnel0
description "IPv6 uplink to SixXS"
no ip address
ipv6 address 2A00:15B8:100:E::2/64
ipv6 enable
ipv6 mtu 1280
tunnel source 10.1.10.223
tunnel mode ipv6ip
tunnel destination 212.126.37.76
!
No firewall enabled.
The exact same config was on the samsung and Linux and it was working fine.
Now it works between half and one hour and then it start bouncing after a while it is stable enough and then it restarts to bounce.
Could you please check on your end if you have any problem?
My e-amil address is cristiano.guerrieri@virtualaccess.com
Many Thanks
Cristiano
State change: user
The state of this ticket has been changed to user
Intermittent tunnel
Now it works between half and one hour and then it start bouncing after a while it is stable enough and then it restarts to bounce.
Can you define 'bouncing'?
As you are behind a NAT, are you sure that your NAT box properly forwards packets?
Did you read that big orange/yellow box? Please do and provide a lot more details. a tcpdump/wireshark might be useful for your case.
Intermittent tunnel
Carmen Sandiego on Friday, 24 June 2011 15:50:30
Sorry for the delay in answering to you.
For bouncing I mean that the tunnel is working for a while. As now, I can browse internet and pinging outside ipv6 world. For no reason it stops working and even from the IPV6 gateway I cant ping the SixxS remote end.
The NAT is definitely working fine. As I'm not experiencing any problems in IPv4 connectivity. All the IPv4 traffic is natted.
If you want you can remove this ticket and I can send my request to info@sixxs.com, with traces and all the information needed.
Cristiano
Intermittent tunnel
For no reason it stops working and even from the IPV6 gateway I cant ping the SixxS remote end.
Where are the relevant interfaces and routing tables and possibly more importantly in this case a nice tcpdump showing traffic going out and maybe a ICMP unreachable or so coming in?
Please see that big yellow/orange box for a reference to a list of things we would like to see.
The NAT is definitely working fine. As I'm not experiencing any problems in IPv4 connectivity
Protocol-41 handling is NOT a standard feature of a NAT, I would be very suspicious of it.
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on Friday, 17 June 2011 23:18:11
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