Nortel ERSでスタックが落ちた時のエラーメッセージ

I    4    2013-08-30 14:37:35 GMT+09:00 51       IGMP: Unknown Multicast Filter　disabled
I    4    2013-08-30 14:37:35 GMT+09:00 50       Ring: B 1/2 – D 2/3 – D 3/4 -　D 4/1
I    4    2013-08-30 14:37:35 GMT+09:00 49       Join event sent, unit mask 0x08, appl mask 0x0000005D 0xB5FFFFFF
I    4    2013-08-30 14:37:35 GMT+09:00 48       NUQC – Disabled
I    4    2013-08-30 14:37:34 GMT+09:00 47       DISTRIBUTE_DB event sent, unit　mask 0x08, appl mask 0x00000000
I    4    2013-08-30 14:36:45 GMT+09:00 46       Stack port 2 UP
I    4    2013-08-30 14:35:14 GMT+09:00 45       MODULE_INACTIVE event sent, unit mask 0x01, appl mask 0xB5FFFFFF
I    4    2013-08-30 14:35:14 GMT+09:00 44       Stack port 2 DOWN