I have this running both ways (i.e. two switches in the network have the same IP SLA configuration except the IP addresses are reversed). There is no recorded packet loss but the 3560 & 3750 report incrementing 'PacketMIA':
cat-3560-48-s1#sho rtr collection-statistics 1
Entry number: 1
Start Time Index: 14:13:16.264 GMT Tue Mar 6 2007
Number of successful operations: 60
Number of operations over threshold: 0
Number of failed operations due to a Disconnect: 0
Number of failed operations due to a Timeout: 0
Number of failed operations due to a Busy: 0
Number of failed operations due to a No Connection: 0
Number of failed operations due to an Internal Error: 0
Number of failed operations due to a Sequence Error: 0
Number of failed operations due to a Verify Error: 0
The same configuration with a Catalyst 3550 shows no PacketMIA's (3550 one end, 3560/3750 at the other end). This is all on a test network so there is no real traffic, QoS is enabled but I have tried the same rtr configuration without any ToS being set, so sent and handled in the middle of the test network as best-effort. I have checked with a colleage and he has seen exactly the same behaviour so I am assuming this is behaviour specific to the 3560/3750 platform and perhaps a bug?
I have looked through the Bug navigator and all I could find was a bug in 12.3T (CSCeg13677). I am running the very latest code for all the switches involved- 3560 12.2(35)SE1, 3750 12.2(35)SE2, 3550 12.2(35)SE. I have also downgraded a 3560 to 12.2(35)SE and 12.2(25)SEE2 and the behaviour remains the same.
Has anyone else experienced this behaviour or managed to find a workaround?
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