Westermo RedFox Series - Manual (Page 429)

Westermo OS Management Guide
Version 4.17.0-0
TCP-MSS clamping is used to limit the packet size (or more precisely, limit
the ”maximum TCP segment size”) of TCP connections over the given inter-
face, and is useful in situations where path MTU discovery of some reason
does not work.
Enabling TCP-MSS clamping implies additional packet processing, thus it de-
grades routing performance somewhat. It is disabled by default on most
interface types (exception is PPP interface of type PPPoE).
Use ”tcp-mss <BYTES>” to limit TCP-MSS to the given number of bytes.
Use ”tcp-mss auto” to let the TCP-MSS depend on the MTU of the interface
(”MTU-40”, i.e., interface MTU minus typical size of IP and TCP headers).
This will work fine for typical TCP connections, but is not likely to work over
IPsec tunnels or when additional IP header options are in use.
Use ”no tcp-mss” to disable TCP-MSS clamping.
Use ”show tcp-mss” to show the interface maximum TCP segment size
(MSS).
Default values Disabled (no tcp-mss) (Exception: ”tcp-mss 1412” for PPPoE
PPP interfaces.)
19.6.10 Sending ICMP Redirect messages
Syntax [no] redirect
Context Interface Configuration context
Usage Enable/disable sending of ICMP Redirect messages. When enabled on a
WeOS router, the router will send ICMP Redirect messages when detecting
that packets coming in on this interface have a more optimal route towards
the destination.
Use ”redirect” to enable sending of ICMP Redirect, and ”no redirect” to
disable it.
Use ”show redirect” to show if sending of ICMP Redirect is enabled or
disabled.
Default values Enabled
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