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I am troubleshooting an issue between two 7600 routers running 12.2(33)SRE3. The ospfv3 session between these two routers keeps going down and up. Other ospfv2/v3 sessions on either router do not have this problem. Mar 1 18:44:22 ROUTER notice 4645: Mar 1 13:44:21.465 Eastern: %OSPFv3-5-ADJCHG: Process 19271, Nbr x.y.161.253 on GigabitEthernet3/2 from FULL to DOWN, Neighbor Down: Too many retransmits Mar 1 18:45:23 ROUTER notice 4646: Mar 1 13:45:22.926 Eastern: %OSPFv3-5-ADJCHG: Process 19271, Nbr x.y.161.253 on GigabitEthernet3/2 from LOADING to FULL, Loading Done Mar 1 18:47:27 ROUTER notice 4647: Mar 1 13:47:26.216 Eastern: %OSPFv3-5-ADJCHG: Process 19271, Nbr x.y.161.253 on GigabitEthernet3/2 from FULL to DOWN, Neighbor Down: Too many retransmits This occurs approximately every 3 minutes. Troubleshooting steps I have tried: * applied ipv6 ospf mtu-ignore * removed ipv6 ospf configuration from interface and re-applied * passive-interface -> no passive-interface - -- ospfv3 interface configuration -- ipv6 ospf network point-to-point ipv6 ospf cost 350 ipv6 ospf 1 area 0 - -- show ipv6 ospf neighbor from router logging "too many retransmits" -- #sh ipv6 ospf neighbor g3/2 detail Neighbor x.y.161.253 In the area 0 via interface GigabitEthernet3/2 Neighbor: interface-id 14, link-local address FE80::106:C2 Neighbor priority is 0, State is FULL, 6 state changes Options is 0x000013 in Hello (V6-Bit, E-Bit, R-bit) Options is 0x000013 in DBD (V6-Bit, E-Bit, R-bit) Dead timer due in 00:00:38 Neighbor is up for 00:01:29 Index 1/7/7, retransmission queue length 4, number of retransmission 19 First 0x0(0)/0x543B7C10(26714)/0x543B6B80(9515088) Next 0x0(0)/0x543B7C10(26714)/0x543B6B80(9515088) Last retransmission scan length is 1, maximum is 1 Last retransmission scan time is 0 msec, maximum is 0 msec Link State retransmission due in 529 msec #sh ipv6 ospf neighbor g3/2 detail Neighbor x.y.161.253 In the area 0 via interface GigabitEthernet3/2 Neighbor: interface-id 14, link-local address FE80::106:C2 Neighbor priority is 0, State is DOWN, 7 state changes Neighbor ignored, reenable in 00:00:10 Options is 0x000013 in Hello (V6-Bit, E-Bit, R-bit) Index 0/0/0, retransmission queue length 0, number of retransmission 27 First 0x0(0)/0x0(0)/0x0(0) Next 0x0(0)/0x0(0)/0x0(0) Last retransmission scan length is 1, maximum is 1 Last retransmission scan time is 0 msec, maximum is 0 msec Any other things I can look at before opening a TAC case? - -- Devon -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1tQqUACgkQWP2WrBTHBS9hOQCgj+xxqANnd8lLE85iHxb8lx8B 8JYAn3dG5WXiWqN/go3Eo0uNZrWrfEzy =oy0Z -----END PGP SIGNATURE----- _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/