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Beginner

6509 VSS EIGRP Neighbor Issue

I have a pair of 6509's with Sup720-10g's.  They are configured in a VSS cluster.  We are seeing some very strange EIGRP behavior.  When I do a

show ip eigrp neighbors

H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq

                                            (sec)         (ms)       Cnt Num

2   10.0.0.2            Vl123             31 00:00:32  111   666  0  316523

3   10.0.0.1            Vl123             45 00:21:25   63   567  0  627040

1   10.0.0.65           Vl123             14 15:35:18   60   540  0  168147

0   10.0.0.130          Vl123             14 23:10:40    1   300  0  349168

I am not receiving a hello every 5 seconds from 10.0.0.1 and 10.0.0.2.  I changed the ip hold-time eigrp 1 60 on Interface Vlan123 on both 10.0.0.1 and 10.0.0.2 in an attempt to keep the neighbors up longer.  That helped somewhat, but I still lose those neighbors periodically (hold time expired).  I am also missing a neighbor completely.  10.0.0.129 should be in this list.  All the other neighbors have no trouble whatsoever seeing each other and staying up.  I have tried pinging 224.0.0.10 from 10.0.0.1, 10.0.0.2, and 10.0.0.129 and I get responses from all 5 neighbors every time.  I don't get it.  It is almost as if the 6509 is dropping the packets or something.

10.0.0.1 is a Catalyst 4506

10.0.0.2 is a Catalyst 4506

10.0.0.65 is a pair of Catalyst 6509 with Sup720-10g's.

10.0.0.129 is a Catalyst 4506

10.0.0.130 is a Catalyst 4506

10.0.0.193 is the problem switch. It is a pair of Catalyst 6509 with Sup720-10g's

I have checked nearly everything.  K values match on all devices.  I found bug CSCsd31503, but the workaround did not work.  There is also no fixed version of the software for the SUP720-10g.

Has anyone else experienced this issue?

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