Juniper IGP - CONFIGURATION GUIDE V11.1.X Configuration Manual page 40

JUNOSe 11.0.x IP, IPv6, and IGP Configuration Guide
ip mtu
ip redirects
ip tcp adjust-mss
NOTE: The purpose behind using MSS is to alleviate problems with Path MTU
Discovery (PMTUD) and resulting "black hole" detection issues. (See RFC 2923, "TCP
Problems with Path MTU Discovery," for additional information about the "black
hole" scenario.)
16
Creating a Profile
Use to enable a directed broadcast address in a profile.
Example
host1(config-if)#ip directed-broadcast
Use the no version to remove the directed broadcast address from the profile.
See ip directed-broadcast
Use to assign the MTU size sent on an IP interface.
Example
host1(config-if)#ip mtu 5000
Use the no version to remove the assignment from the profile.
See ip mtu
Use to enable the sending of redirect messages if the software is forced to resend
a packet through the same interface on which it was received.
Example
host1(config-if)#ip redirects
Use the no version to remove the assignment from the profile.
See ip redirects
Use to modify the maximum segment size (MSS) for TCP SYN packets traveling
through the interface. The router compares the MSS value of incoming or outgoing
packets against the MSS adjustment value. For any packet that contains an MSS
value larger than the MSS adjustment value, the router replaces the MSS option
with the configured adjustment value. If the packet does not contain an MSS
value, the router assumes a value of 536 for the packet MSS on which to base
the comparison.
Example
host1(config-if)#ip tcp adjust-mss 5000