number of SYN retries does not match value in /proc/sys/net/ipv4/tcp_syn_retries
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SUSE Linux Enterprise Server 11 Service Pack 1
This is different from previous SUSE Linux Enterprise versions and with kernel up to 2.6.31, where the actual number of syn retries is the number in tcp_syn_retries + 1.
This results in less time spent in trying to establish the connection before the client gives up.
The old default connection timeout was ~180 seconds, while the new one is about ~23 seconds.
The reason is a change in kernel 2.6.32, using calculation instead of a direct definition of the retries number.
As workaround on SUSE Linux Enterprise 11 Service Pack 1 the number of /proc/sys/net/ipv4/tcp_syn_retries can be increased.
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- Document ID:7010211
- Creation Date: 23-Feb-2012
- Modified Date:12-Oct-2022
- SUSE Linux Enterprise Server
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