Symptoms
The BIG-IP system might fail to send RSTs, ICMP unreachable, or ICMP echo responses for some addresses.
/var/log/ltm might contain messages similar to the following:
-- Limiting icmp unreach response from 251 to 250 packets/sec.
-- Limiting icmp ping response from 251 to 250 packets/sec.
-- Limiting closed port RST response from 251 to 250 packets/sec.
Impact
Certain response messages from addresses in one or more traffic-groups (but not all) might be rate limited by the BIG-IP system even though the level of traffic has not exceeded the tm.maxrejectrate setting.
Conditions
Certain traffic patterns to addresses in two or more different traffic-groups.
Fix Information
The rate limiting messages in the ltm log will now include the name of the traffic group that is being rate limited.
Example old log message:
warning tmm[6167]: 011e0001:4: Limiting icmp ping response from 251 to 250 packets/sec.
Example new log message:
warning tmm[19109]: 011e0001:4: Limiting icmp ping response from 251 to 250 packets/sec for traffic group /Common/traffic-group-1.
Behavior Change
The rate limiting messages in the ltm log will now include the name of the traffic group that is being rate limited.
Example old log message:
warning tmm[6167]: 011e0001:4: Limiting icmp ping response from 251 to 250 packets/sec.
Example new log message:
warning tmm[19109]: 011e0001:4: Limiting icmp ping response from 251 to 250 packets/sec for traffic group /Common/traffic-group-1.
