AC2 零出网采样(r2 复测,describe 真图全程;方法同 zero-egress-sample2.txt):

pid=85005 85005 user   21u  IPv4 0x1f8758660aa0529c      0t0  TCP 127.0.0.1:54914->127.0.0.1:7897 (ESTABLISHED)
pid=85005 85005 user   28u  IPv4 0xef51d9b730dfe971      0t0  TCP 127.0.0.1:54918->127.0.0.1:7897 (ESTABLISHED)

非 loopback 对端: 无
