CCIE Pursuit Blog

April 5, 2008

Internetwork Expert Volume II: Lab 6 – Section 6

IPv6 – 7 Points

6.1 IPv6 Addressing

Easy task, but I’m not sure why the IE solution uses eui-64 addressing for fa0/0 on r3?

Task 6.1 – IPv6

6.2 RIPng

Configure RIPng on all interfaces running IPv6.  Have r3 originate a default route to r2.  r2 should not see any of the specific subnets learned from BB2, but don’t use a prefix-list to accomplish this.

NOTE: Don’t forget to disable split-horizon on r1 (FR hub).

I’d love to give you a link to the DOCCD for some of these commands, but Cisco has completely fucked up the IPv6 documentation.

r3(config-if)#int s0/3:0
r3(config-if)#ipv rip RIPng en
r3(config-if)#ipv rip RIPng ?
  default-information  Configure handling of default route

r3(config-if)#ipv rip RIPng default-information ?
  only       Advertise only the default route
  originate  Originate the default route

r3(config-if)#ipv rip RIPng default-information only

r2#sh ipv route rip
IPv6 Routing Table – 8 entries
Codes: C – Connected, L – Local, S – Static, R – RIP, B – BGP
       U – Per-user Static route, M – MIPv6
       I1 – ISIS L1, I2 – ISIS L2, IA – ISIS interarea, IS – ISIS summary
       O – OSPF intra, OI – OSPF inter, OE1 – OSPF ext 1, OE2 – OSPF ext 2
       ON1 – OSPF NSSA ext 1, ON2 – OSPF NSSA ext 2
       D – EIGRP, EX – EIGRP external
R   ::/0 [120/2]
     via FE80::211:93FF:FEB0:9DA0, Serial0/1/0

R   2001:192:10:1::/64 [120/2]
     via FE80::211:93FF:FEB0:9DA0, Serial0/1/0
R   2001:CC1E:1:5::/64 [120/3]
     via FE80::1, Serial0/0/0

6.3 RIPng Summarization

Configrue r3 to advertise a single /48 summary of all of the IPv6 addresses.

r3(config)#int fa0/0
r3(config-if)#ipv6 rip RIPng summary-address 2001:CC1E:1::/48

r3#debug ipv6 rip fa0/0
RIP Routing Protocol debugging is on for interface FastEthernet0/0
*Mar  1 22:31:38: RIPng: Sending multicast update on FastEthernet0/0 for RIPng
*Mar  1 22:31:38:        src=FE80::211:93FF:FEB0:9DA0
*Mar  1 22:31:38:        dst=FF02::9 (FastEthernet0/0)
*Mar  1 22:31:38:        sport=521, dport=521, length=52
*Mar  1 22:31:38:        command=2, version=1, mbz=0, #rte=2
*Mar  1 22:31:38:        tag=0, metric=1, prefix=2001:192:10:1::/64
*Mar  1 22:31:38:       tag=0, metric=1, prefix=2001:CC1E:1::/48 

 

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