[c-nsp] Repeated %GT96K_FEWAN-5-UNDERFLOW on 3725

[Christopher J. Pilkington]

Good Afternoon,

Has anyone else seen the following?  We're on a 3725 running 12.2(8)T10.

Mar 22 12:02:20.032: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 12:02:20.032: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 12:39:12.488: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 12:39:12.492: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 12:40:47.108: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 12:40:47.116: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 12:42:36.700: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 12:42:36.700: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 12:45:05.552: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 12:45:05.552: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 12:47:46.100: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 12:47:46.104: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/0
Mar 22 13:01:33.371: %GT96K_FEWAN-5-UNDERFLOW: Transmit underflow on int FastEthernet0/1

This seems to occur under insignficant load, and output interpreter claims it is unimportant, nevertheless, it seems concerning.  This happens constantly... sometimes it will stop for a few hours, but I can't seem to pin down a condition that causes this to occur.  I also don't know the implication.

The other active interface in the box is a HSSI, running frame relay.

Any guidance would be a great help!

Cheers,
-- 
Christopher J. Pilkington <cjp at 0x1.net>