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-rwxr-xr-xsrc/conf_mode/system-ip.py21
1 files changed, 21 insertions, 0 deletions
diff --git a/src/conf_mode/system-ip.py b/src/conf_mode/system-ip.py
index 63dff0e36..9ed34c735 100755
--- a/src/conf_mode/system-ip.py
+++ b/src/conf_mode/system-ip.py
@@ -95,6 +95,27 @@ def apply(opt):
value = '1' if (tmp != None) else '0'
sysctl_write('net.ipv4.fib_multipath_hash_policy', value)
+ # configure TCP options (defaults as of Linux 6.4)
+ tmp = dict_search('tcp.mss.probing', opt)
+ if tmp is None:
+ value = 0
+ elif tmp == 'on-icmp-black-hole':
+ value = 1
+ elif tmp == 'force':
+ value = 2
+ else:
+ # Shouldn't happen
+ raise ValueError("TCP MSS probing is neither 'on-icmp-black-hole' nor 'force'!")
+ sysctl_write('net.ipv4.tcp_mtu_probing', value)
+
+ tmp = dict_search('tcp.mss.base', opt)
+ value = '1024' if (tmp is None) else tmp
+ sysctl_write('net.ipv4.tcp_base_mss', value)
+
+ tmp = dict_search('tcp.mss.floor', opt)
+ value = '48' if (tmp is None) else tmp
+ sysctl_write('net.ipv4.tcp_mtu_probe_floor', value)
+
if 'protocol' in opt:
zebra_daemon = 'zebra'
# Save original configuration prior to starting any commit actions