We have two switches that are behaving strangely. When I ping them the responses alternate between high and low results:

C:\Users\paul>ping sw-linksys1 -t

Pinging sw-linksys1.sep.com [172.16.254.235] with 32 bytes of data:
Reply from 172.16.254.235: bytes=32 time=39ms TTL=64
Reply from 172.16.254.235: bytes=32 time=154ms TTL=64
Reply from 172.16.254.235: bytes=32 time=2ms TTL=64
Reply from 172.16.254.235: bytes=32 time=142ms TTL=64
Reply from 172.16.254.235: bytes=32 time=2ms TTL=64
Reply from 172.16.254.235: bytes=32 time=143ms TTL=64
Reply from 172.16.254.235: bytes=32 time=2ms TTL=64
Reply from 172.16.254.235: bytes=32 time=146ms TTL=64
Reply from 172.16.254.235: bytes=32 time=2ms TTL=64
Reply from 172.16.254.235: bytes=32 time=152ms TTL=64
Reply from 172.16.254.235: bytes=32 time=2ms TTL=64
Reply from 172.16.254.235: bytes=32 time=153ms TTL=64
Reply from 172.16.254.235: bytes=32 time=2ms TTL=64
Reply from 172.16.254.235: bytes=32 time=153ms TTL=64
Reply from 172.16.254.235: bytes=32 time=2ms TTL=64

Other switches in the network behave normally. I've rebooted the switches, but the behavior still is there with the ping. Any ideas on how to troubleshoot this?

Thanks!