RE: IPv6 Tunneling - Auto6to4

From: Daniel Kutchin (daniel@kutchin.com)
Date: Sat Jan 03 2009 - 11:01:47 ARST

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Nitro Drops ---

If you want to use a single static route...

ipv6 route 2002::/16 Tunnel0

...then implement the 6to4 ipv6 addressing scheme strictly:

R2:
interface Tunnel0
 ipv6 address 2002:9601:202:0000::Y/64
!
interface [Interface-name-and-number]
 ipv6 address 2002:9601:202:XXXX::Y/64 <--- where XXXX ranges from 0001 to
FFFF
!
ipv6 route 2002::/16 Tunnel0

R5:
interface Tunnel0
 ipv6 address 2002:9601:505:0000:Y/64
!
interface [Interface-name-and-number]
 ipv6 address 2002:9601:505:XXXX::Y/64 <--- where XXXX ranges from 0001 to
FFFF
!
ipv6 route 2002::/16 Tunnel0

Any ipv6 addressing outside this norm attracts a static ipv6 route.

---
Daniel
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Nitro Drops
Sent: Donnerstag, 1. Januar 2009 13:44
To: ccielab@groupstudy.com
Subject: IPv6 Tunneling - Auto6to4
Hi All,
Happy New Year!
Task : R2 E0/0 able to access R5 E0/1 using Tunnel (Auto6to4)
E0/0 R2 Tun0 ------ Tun0 R5 E0/1
R2
interface Tunnel0
 ipv6 address 2002:9601:202::2/64  >> translated from Loopback IPv4
150.1.4.4
 tunnel source Loopback0
 tunnel mode ipv6ip 6to4
interface FastEthernet0/0
 ip address 142.1.27.2 255.255.255.0
ipv6 address 2002:8E11:3502:27::/64 eui-64
 ipv6 address FE80::2 link-local
ipv6 route 2002:8E11:505:5::/64 2002:9601:505::5
ipv6 route 2002::/16 Tunnel0
ipv6 route 2002:8E11:3502:27::/64 2002:9601:202::2
ipv6 route 2002::/16 Tunnel0
R5
interface Tunnel0
  ipv6 address 2002:9601:505::5/64    >> translated from Loopback IPv4
150.1.5.5
 tunnel source Loopback0
 tunnel mode ipv6ip 6to4
interface Ethernet0/0
 ip address 142.1.5.5 255.255.255.0
ipv6 address 2002:8E11:505:5::/64 eui-64
 ipv6 address FE80::5 link-local
ipv6 route 2002:8E11:3502:27::/64 2002:9601:202::2
ipv6 route 2002::/16 Tunnel0
Qns : Why is there is a need for double static routes? Wouldnt a single
'ipv6
route 2002::/16 Tunnel0  covers the other static route (longer match)?
I tried using only one static route 'ipv6 route 2002::/16 Tunnel0 ', it
didnt
manage to work.
Cheers
Nit

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