cisco 6509 link-flag error

*Jul  2 17:34:57: %OSPF-5-ADJCHG: Process 1, Nbr 11.9.14.21 on Vlan15 from FULL to DOWN, Neighbor Down: Interface down or detached

*Jul  2 17:36:49: %PM-SP-4-ERR_DISABLE: link-flap error detected on Te3/4, putting Te3/4 in err-disable state

*Jul  2 17:36:49: %PM-SPSTBY-4-ERR_DISABLE: link-flap error detected on Te3/4, putting Te3/4 in err-disable state

*Jul  2 18:46:07: %PFINIT-SP-5-CONFIG_SYNC: Sync'ing the startup configuration to the standby Router.

*Jul  2 20:07:44: %MCAST-SPSTBY-6-GC_LIMIT_EXCEEDED: IGMP snooping was trying to allocate more Layer 2 entries than what allowed (15488)