Cisco Packet Tracer - unable to route IPv6.

[James L]

HI. I am unable to see any remote IPv6 routes on my 3650 Packet Tracer switch.

I can get a similar config working on Router to Router links with no problems (so must be missing something with a L3 switch).

I have 2 client computers connected to g1/0/1 & g1/0/2. They can ping the default gw (vlan1) no problem.

I have a pretty big network behind vlan 100 but my rip routing table isn't showing it.

--- 3650 switch --
ip cef
ip routing
!
ipv6 unicast-routing
!
no ipv6 cef
interface Loopback0
no ip address
ipv6 address 2001:1::1/64
ipv6 rip rip enable
!
interface GigabitEthernet1/0/1
spanning-tree portfast
!
interface GigabitEthernet1/0/2
spanning-tree portfast
!
!
interface GigabitEthernet1/0/24
switchport access vlan 100
!
interface Vlan1
no ip address
ipv6 address 2001::3/64
ipv6 rip rip enable
!
interface Vlan100
mac-address 0001.c91c.e301
ipv6 address 2001:2::1/64
ipv6 rip rip enable
!
router rip
!
ipv6 router rip rip

And a Router connected into g1/0/24 - vlan 100

ipv6 unicast-routing

!

interface GigabitEthernet0/0
no ip address
duplex auto
speed auto
ipv6 address 2001:2::2/64
ipv6 rip rip enable
!

ipv6 router rip rip

I can ping the address on either end and get a reply - 2001:2::1 --> 2001:2::2 

Any pointers?

[Deepak Kumar]

Hi,

Please share the routing table output.

Regards,

Deepak Kuamar

[James L]

mlsswitch1#sh ipv6 route

IPv6 Routing Table - 7 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

C   2001::/64 [0/0]

     via ::, Vlan1

L   2001::3/128 [0/0]

     via ::, Vlan1

C   2001:1::/64 [0/0]

     via ::, Loopback0

L   2001:1::1/128 [0/0]

     via ::, Loopback0

C   2001:2::/64 [0/0]

     via ::, Vlan100

L   2001:2::1/128 [0/0]

     via ::, Vlan100

L   FF00::/8 [0/0]

     via ::, Null0

mlsswitch1#



and the Router that is connected into G1/0/24:



Router#sh ipv6 route

IPv6 Routing Table - 7 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   2001::/64 [120/2]

     via FE80::250:FFF:FE23:9301, GigabitEthernet0/0

R   2001:1::/64 [120/2]

     via FE80::250:FFF:FE23:9301, GigabitEthernet0/0

C   2001:2::/64 [0/0]

     via GigabitEthernet0/0, directly connected

L   2001:2::2/128 [0/0]

     via GigabitEthernet0/0, receive

C   2001:99::/64 [0/0]

     via Loopback0, directly connected

L   2001:99::1/128 [0/0]

     via Loopback0, receive

L   FF00::/8 [0/0]

     via Null0, receive

Router#

[Georg Pauwen]

Hello,

post the Packet Tracer file (save as .pkt and rename to .jpg, otherwise you cannot upload it).

[James L]

HI.

Please see attached.

I also built a quick 3650 switch back to back but again the PC's from the bottom switch can't ping the switch on the top.

thanks.

[Georg Pauwen · Accepted solution]

Hello,

as soon as I configure the uplink port (GigabitEthernet1/0/24) on the switch as 'no switchport' and enable ipv6 rip, it establishes the neighborship.

interface GigabitEthernet1/0/24
no switchport
no ip address
duplex auto
speed auto
ipv6 rip rip enable

To be honest, I wouldn't spend too much time on it. Packet Tracer doesn't run a real, full IOS, but only a set of predefined commands, which trigger predefined responses...

If you get it to work in GNS3, that is more like the real world...