UKTcpTuning

Parameter	Fasterdata.es.net	ECDF	GLASGOW	LIVERPOOL	MANCHESTER	OXFORD	QMUL	RAL Tier 1	Lancaster	Cambridge	Birmingham
net.core.rmem_max	16777216	16777216	2097152	8388608	8388608	16777216	16777216	8388608	2097152	16777216	67108864
net.core.wmem_max	16777216	16777216	2097152	8388608	8388608	16777216	16777216	8388608	2097152	16777216	67108864
net.ipv4.tcp_rmem	4096 87380 16777216	65536 1048576 16777216	131072 1048576 2097152	8192 1048576 8388608	8192 1048576 8388608	4096 1048576 16777216	4096 87380 16777216	4096 131072 8388608	131072 1048576 2097152	4096 87380 16777216	4096 87380 67108864
net.ipv4.tcp_wmem	4096 65536 16777216	65536 1048576 16777216	131072 1048576 2097152	8192 1048576 8388608	8192 1048576 8388608	4096 1048576 16777216	4096 65536 16777216	4096 131072 8388608	131072 1048576 2097152	4096 65536 16777216	4096 65536 67108864
net.ipv4.tcp_congestion_control	htcp on SL5	htcp	-	htcp	htcp	-	htcp on SL5	bic	-	htcp on SL5	htcp on SL5

Notes: "-" will mean the default is being applied

Settings are in

/etc/sysctl.conf

and applied with

sysctl -p