ppp0 bandwidth spiking

[Gabe Small]

Greetings,

We have several PowerEdge 2650's (A19/ESM 3.14/om_410/RHAS 2.1 e38) with a Remote Access Controller.  As you know, this RAC card uses a ppp interface.  I am using a product called Denika to track interface bandwidth and over the weekend I noticed the PPP interface spike from a constant:

96 bytes/ps IN
55 bytes/ps OUT

to:

60Mbit/ps IN
59Mbit/ps OUT

for about 3 minutes - our threshold alert went off which brought this to my attention.  Based on the SNMP graphs, this exact thing happened 3 weeks ago at the same time.

ppp0      Link encap:Point-to-Point Protocol
          inet addr:192.168.234.235  P-t-P:192.168.234.236  Mask:255.255.255.255

What would cause the ppp0 interface on 10BaseT half-duplex to spike like that? Is there an OM cleanup process of some kind? Anyone else see this?

Thanks,

Gabe Small
Hosting Engineer
Inceptor, Inc.