CCIE Pursuit Blog

April 4, 2008

Internetwork Expert Volume II: Lab 3 – Section 7

IPv6 – 4 Points

7.1 IPv6 Addressing

Easy.

“The host portion of the IPv6 addresses should be based partly off of their interfaces’ respective MAC addresses.”

That’s your clue to use eui-64:

r4(config-if)#ipv6 add 2001:CC1E:1:404::/64 ?
  anycast  Configure as an anycast
  eui-64   Use eui-64 interface identifier
  <cr>

r4(config-if)#ipv6 add 2001:CC1E:1:404::/64 eui-64

r4(config-if)#do sh int fa0/0 | i bia
  Hardware is MV96340 Ethernet, address is 0017.0ee7.9058 (bia 0017.0ee7.9058)

r4(config-if)#do sh ipv6 int fa0/0
FastEthernet0/0 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::217:EFF:FEE7:9058
  Global unicast address(es):
    2001:CC1E:1:404:217:EFF:FEE7:9058, subnet is 2001:CC1E:1:404::/64 [EUI]

This is the second time that this has happened to me in this lab:

“The network administrator has requested that VLAN 29 and VLAN 4 be configured to support IPv6.”

VLAN 4 is only configured (at L3) on r4’s fa0/0 interface.  VLAN 29 (at L3) is configured between r2’s fa0/0 and sw3’s vlan29 (SVI) interface.  Why doesn’t the solution include sw3?

7.2  IPv6 Tunneling

Create a GRE tunnel between VLAN 29 and VLAN 4.  Use any site-local address for the IPv6 addressing within the tunnel.  Configure an IPv6 static route to obtain reachability.

r4#sh run | sec Tunnel|ipv6 route
interface Tunnel0
 no ip address
 ipv6 address FEC0::4/64
 tunnel source 150.1.4.4
 tunnel destination 150.1.2.2
!
ipv6 route 2001:CC1E:1:202::/64 Tunnel0

r2#sh run | sec Tunnel|ipv6 route
interface Tunnel0
 no ip address
 ipv6 address FEC0::2/64
 tunnel source 150.1.2.2
 tunnel destination 150.1.4.4
!
ipv6 route 2001:CC1E:1:404::/64 Tunnel0

r2#p 2001:CC1E:1:404:217:EFF:FEE7:9058

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:CC1E:1:404:217:EFF:FEE7:9058, timeout is
2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 136/138/140 ms

r4#p 2001:CC1E:1:202:217:EFF:FEE7:9940

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:CC1E:1:202:217:EFF:FEE7:9940, timeout is
2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 136/137/140 ms

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