case DOA

my node:
Local rate: 1.52TH/s (1.1% DOA) Expected time to share: 1.4 hours
Shares: 76 total (6 orphaned, 2 dead) Efficiency: 107.4%

de.ckpool.org node:
Local rate: 1.55TH/s (21% DOA) Expected time to share: 1.5 hours
Shares: 8 total (1 orphaned, 2 dead) Efficiency: 77.60%

there is SP20 running both

ping de.ckpool.org
PING de.ckpool.org (84.200.2.30) 56(84) bytes of data.
64 bytes from 84.200.2.30: icmp_seq=1 ttl=53 time=33.3 ms