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Update README.md #8

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13 changes: 7 additions & 6 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,8 @@ Namely:
[iproute2 repository](https://github.com/L4STeam/iproute2)
- An implementation of Accurate ECN (see branch AccECN-full)
- The base implementation of TCP Prague (see branch tcp_prague)
- ECT(1) enabled DCTCP
- ECT(1) enabled BBR v2 (from v2alpha branch in
- ECT(1) and AccECN enabled DCTCP
- ECT(1) and AccECN enabled BBR v2 (from v2alpha branch in
[BBR v2 repo](https://github.com/google/bbr))

# Installation (debian derivatives)
Expand Down Expand Up @@ -93,7 +93,7 @@ tc/tc qdisc replace dev eth0 root dualpi2 ...

While dualpi2 can work with DCTCP, DCTCP suffers from a few unfortunate
interactions with GSO/pacing/..., resulting in under-utilization. As a result,
we advice you to use tcp_prague which currently has
we advise you to use tcp_prague which currently has
basic fixes to those limitations. Note that this might still under-perform in
heavily virtualized settings, as scheduling becomes less reliable.

Expand All @@ -103,6 +103,7 @@ sysctl -w net.ipv4.tcp_congestion_control=prague
sysctl -w net.ipv4.tcp_ecn=3
```

Prague attempts to negotiate Accurate ECN automatically.
Note that, at the moment, Accurate ECN **must** be enabled on both ends of a
connection in order it with DCTCP or BBR v2.
Prague, BBRv2 and DCTCP attempt to negotiate Accurate ECN automatically once
the AccECN sysctl is enabled.
Note that, Accurate ECN **must** be enabled on both ends of a
connection in order for the negotiation to succeed.