Tickets - Subnet Routing Problem - destination unreachable (T65169) :: SixXS

Ticket ID: SIXXS #5521442
Ticket Status: User

PoP: plwaw01 - ICM (Warsaw)

Subnet Routing Problem - destination unreachable (T65169)

Shadow Hawkins on Thursday, 08 September 2011 01:02:01

I have a problem with subnet (R47154) on my tunnel (T65169). When I send pings from 2001:6a0:1ab::1 to my tunnel endpoint address, everything is ok. I get a reply.

IP6 2001:6a0:1ab::1 > 2001:6a0:200:288::2: ICMP6, echo request, seq 1, length 64 IP6 2001:6a0:200:288::2 > 2001:6a0:1ab::1: ICMP6, echo reply, seq 1, length 64

But When I send pings from 2001:6a0:1ab::1 to subnet, I'm getting an error from tunnel endpoint on your side.

IP6 2001:6a0:1ab::1 > 2001:6a0:310::1: ICMP6, echo request, seq 1, length 64 IP6 2001:6a0:310::1 > 2001:6a0:1ab::1: ICMP6, echo reply, seq 1, length 64 IP6 2001:6a0:200:288::1 > 2001:6a0:310::1: ICMP6, destination unreachable, unreachable port

All packets sent from my subnet are rejected by tunnel with destination unreachable error.

State change: user Locked

Jeroen Massar SixXS Staff

on Thursday, 08 September 2011 01:37:19

The state of this ticket has been changed to user

Subnet Routing Problem - destination unreachable (T65169)

Jeroen Massar SixXS Staff

on Thursday, 08 September 2011 01:37:52

What is the route of these packets and what other configuration are in place?

Subnet Routing Problem - destination unreachable (T65169)

Shadow Hawkins on Thursday, 08 September 2011 17:50:58

There are two Tunnels in one PoP (plwaw01). (Subnet A) ===(Tunnel A)===> (plwaw01 PoP) ===(Tunnel B)==>(Subnet B) Subnet A and Tunnel A are OK. I can connect from Subnet addresses and Tunnel A endpoint address to any IPv6 host. Tunnel B endpoint address works too. I add subnet B address to other interface on the router with Tunnel B. When I send some packets which source address is Subnet B, tunnel endpoint on PoP I got "destination unreachable, unreachable port" from PoP. The same situation is when I send packets from Tunnel/Subnet A. ICMPv6 Request are going to Subnet B address, but Reply (src addr is from Subnet B) is rejected by PoP. Debian Linux configuration: ip6tables is empty, ACCEPT policy IPv6 routing enabled: net.ipv6.conf.all.forwarding = 1

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