If the client’s maximum
segment size (MSS) in a Transmission Control Protocol (TCP) three-way handshake
is greater than the maximum transmission unit can handle, the client might
experience reduced throughput and the fragmentation of packets. To avoid this
problem in controller software release 6.0 or later releases, you can specify
the MSS for all access points that are joined to the controller or for a
specific access point.
When you enable this feature,
the access point selects the MSS for TCP packets to and from wireless clients
in its data path. If the MSS of these packets is greater than the value that
you configured or greater than the default value for the CAPWAP tunnel, the
access point changes the MSS to the new configured value.
MSS is supported only on APs that are in local mode or FlexConnect with
centrally switched WLANs.