[c-nsp] strange ipv6 problems on 3550 SVI

[Matthew Huff]

Just starting to work with ipv6 and seem to have hit a roadblock. I know the 3550 have been EOL, but we still have a number of them. I've got version IP Services 12.2(44)SE6 running on it. I have a 3725 router running advanced IP services 12.4(15)T10 attached to a port set to VLAN 1, and I have the SVI for vlan 1 configured for ipv6, but they cannot ping or make a ipv6 eigrp adjacency. The EIGRP process on the 3725 router sees the link local address from the switch trying to make an adjacency, but then fails after a bit.

config on the switch:
---------------------
ipv6 unicast-routing

interface Vlan1
 ip address 129.77.81.254 255.255.255.0
 ip pim sparse-dense-mode
 ipv6 address 2620:0:2810:251::FF/64
 ipv6 enable
 ipv6 eigrp 14607
end

interface FastEthernet0/48
 switchport mode access
 speed 100
 duplex full
end

ipv6 router eigrp 14607
 no shutdown

ipv6 is configured
---------------------------------
switch-sanfran1#show ipv6 interface vlan1 
Vlan1 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::20A:F4FF:FE0E:7980 
  Description: sanfran-eigrp
  Global unicast address(es):
    2620:0:2810:251::FF, subnet is 2620:0:2810:251::/64 
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::A
    FF02::1:FF00:FF
    FF02::1:FF0E:7980
  MTU is 1500 bytes
  ICMP error messages limited to one every 100 milliseconds
  ICMP redirects are enabled
  ND DAD is enabled, number of DAD attempts: 1
  ND reachable time is 30000 milliseconds
  ND advertised reachable time is 0 milliseconds
  ND advertised retransmit interval is 0 milliseconds
  ND router advertisements are sent every 200 seconds
  ND router advertisements live for 1800 seconds
  ND advertised default router preference is Medium
  Hosts use stateless autoconfig for addresses.

switch-sanfran1#show ipv6 neighbors 
switch-sanfran1#

switch-sanfran1#show ipv6 eigrp interfaces 
EIGRP-IPv6 interfaces for process 14607

                        Xmit Queue   Mean   Pacing Time   Multicast    Pending
Interface        Peers  Un/Reliable  SRTT   Un/Reliable   Flow Timer   Routes
Vl1                0        0/0         0       0/1            0           0

--------------------------------------------------------------------------------
config on the router:
interface FastEthernet0/0
 ip address 129.77.81.253 255.255.255.0
 ip pim sparse-dense-mode
 speed 100
 full-duplex
 ipv6 address 2620:0:2810:251::FE/64
 ipv6 enable
 ipv6 eigrp 14607
end

ipv6 router eigrp 14607
 no shutdown

rtr-sanfran#show ipv6 int fa0/0
FastEthernet0/0 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::20D:65FF:FE85:8E0 
  No Virtual link-local address(es):
  Description: switch-sanfran1
  Global unicast address(es):
    2620:0:2810:251::FE, subnet is 2620:0:2810:251::/64 
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::A
    FF02::1:FF00:FE
    FF02::1:FF85:8E0
  MTU is 1500 bytes
  ICMP error messages limited to one every 100 milliseconds
  ICMP redirects are enabled
  ICMP unreachables are sent
  ND DAD is enabled, number of DAD attempts: 1
  ND reachable time is 30000 milliseconds
  ND advertised reachable time is 0 milliseconds
  ND advertised retransmit interval is 0 milliseconds
  ND router advertisements are sent every 200 seconds
  ND router advertisements live for 1800 seconds
  ND advertised default router preference is Medium
  Hosts use stateless autoconfig for addresses.

rtr-sanfran#show ipv6 neighbors 
IPv6 Address                              Age Link-layer Addr State Interface
FE80::20A:F4FF:FE0E:7980                    0 -               INCMP Fa0/0

rtr-sanfran#show ipv6 eigrp interfaces 
IPv6-EIGRP interfaces for process 14607

                        Xmit Queue   Mean   Pacing Time   Multicast    Pending
Interface        Peers  Un/Reliable  SRTT   Un/Reliable   Flow Timer   Routes
Lo0                0        0/0         0       0/1            0           0
Fa0/0              1        0/0         0       0/1           50           0
Fa0/1              1        0/0        70       0/2          288           0


The error messages I'm getting on the router are:
009792: Mar 18 11:04:28.908 PDT: %DUAL-5-NBRCHANGE: IPv6-EIGRP(0) 14607: Neighbor FE80::20A:F4FF:FE0E:7980 (FastEthernet0/0) is down: retry limit exceeded
009793: Mar 18 11:04:33.481 PDT: %DUAL-5-NBRCHANGE: IPv6-EIGRP(0) 14607: Neighbor FE80::20A:F4FF:FE0E:7980 (FastEthernet0/0) is up: new adjacency
009794: Mar 18 11:05:53.001 PDT: %DUAL-5-NBRCHANGE: IPv6-EIGRP(0) 14607: Neighbor FE80::20A:F4FF:FE0E:7980 (FastEthernet0/0) is down: retry limit exceeded
009795: Mar 18 11:05:56.597 PDT: %DUAL-5-NBRCHANGE: IPv6-EIGRP(0) 14607: Neighbor FE80::20A:F4FF:FE0E:7980 (FastEthernet0/0) is up: new adjacency
----
Matthew Huff       | One Manhattanville Rd
OTA Management LLC | Purchase, NY 10577
http://www.ox.com  | Phone: 914-460-4039
aim: matthewbhuff  | Fax:   914-460-4139