RE: Running Routing Protocol over 6to4 Tunnels

Most likely it is a return problem. Turn debug ipv6 packets on R5 and see if
you can see encapsulation errors or next hop unknown errors.

Regards,
 
Tyson Scott - CCIE #13513 R&S, Security, and SP
Managing Partner / Sr. Instructor - IPexpert, Inc.
Mailto: tscott_at_ipexpert.com

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Ladee Geek
Sent: Friday, June 11, 2010 6:12 PM
To: Cisco certification
Subject: Running Routing Protocol over 6to4 Tunnels

I'm wrestling with running a routing protocol over 6to4 tunnels. I can ping
from tunnel end point to end point, but can't get to any other 2002::/16
addresses I've created. That was based on the static route 2002::/16 out
the tunnel interface. So I am trying a dynamic routing protocol, OSPF in
p-mp nbma mode. I have configured the neighbor statement so there's a next
hop address, but I don't get a neighbor relationship.

When pining the other end of the tunnel I actually see icmp traffic. But
when I ping another 2002 address I don't see anything. I have the static
2002::/16 tunnel 345.

So my static didn't work and neither did a dynamic protocol to get to 2002
addresses other than the tunnel end points.

What am I missing?

Topology: R3, R4 and R5 are set up with 6-to-4 tunnels.

*Rack1R3*(config-if)#do sh run int tun 345
Building configuration...
Current configuration : 267 bytes
!
interface Tunnel345
 no ip address
 no ip redirects
 ipv6 address 2002:9B01:2503::/64 eui-64
 ipv6 ospf network point-to-multipoint non-broadcast
 ipv6 ospf neighbor FE80::9B01:9204
 ipv6 ospf 1 area 345
 tunnel source FastEthernet0/0
 tunnel mode ipv6ip 6to4
*Rack1R3(config-if)#do pin 2002:9B01:3A05::9B01:3A05 - this is the fastether
of R5*
**
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2002:9B01:3A05::9B01:3A05, timeout is 2
seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 60/78/140 ms

*Rack1R3(config)#do sirv | se 2002*
S 2002::/16 [1/0]
     via Tunnel345, directly connected

*Rack1R5(config)#do sh run int tun 345
*Building configuration...
Current configuration : 156 bytes
!
interface Tunnel345
 no ip address
 no ip redirects
 ipv6 address 2002:9B01:3A05::/64 eui-64
 tunnel source FastEthernet0/0
 tunnel mode ipv6ip 6to4
end
*Rack1R5(config)#do sh run int lo 105*
Building configuration...
Current configuration : 80 bytes
!
interface Loopback105
 no ip address
 ipv6 address 2002:9601:505:1::5/64

*Rack1R3(config)#do ping 2002:9601:505::1*
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2002:9601:505::1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Rack1R3(config)#

*Rack1R5(config-if)#do shipv*
Loopback0 [up/up]
    FE80::21A:6CFF:FE9F:9FA8
  * 2002:9601:505::1
*

-- 
r/
LG
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