This is the 64-bit byte-count companion to ccarStatHCFilteredPkts, totaling the actual bytes of traffic that exceeded this interface's CAR rate limit and were filtered. Comparing this counter's growth rate against the configured CIR (committed information rate) tells an admin how much bandwidth demand is being suppressed versus how much is granted, which is critical when deciding whether to raise the rate limit. If a 10 Mbps CAR policy is filtering 50 MB of excess traffic every five minutes, that is roughly 1.3 Mbps of demand being dropped, a signal the policy may be undersized for the workload.