Alcatel-Lucent 7750 SR-OS, Configuration Manual

Page: 171 / 674

IP Router Configuration
7750 SR OS Router Configuration Guide Page 171
config>router>if>ipv6
Description This command allows the TCP MSS value used for TCP connections associated with the IPv4 or IPv6
interface to be set to a static value insted of beign determined by the IP MTU value. The configured
TCP MSS value will onlt be used for future TCP connections associated with the IPv4 or IPv6
interface, existing TCP connections are not affected by the static value.
The no form of the command removed the stat MSS configuration and all future TCP connection will
use a calulated MSS value based on the IP interface MTU.
Default no tcp-mss
Parameters
mss-value — The TCP MSS value that shoudl be used in the TCP SYN packet during the three-way
handshake negotiation of a TCP connection.
Values
384 - 9158 (IPv4)
1220 - 9138 (IPv6)
urpf-check
Syntax [ no ] urpf-check
Context config>router>if
config>router>if>ipv6
Description
This command enables unicast RPF (uRPF) Check on this interface.
The no form of the command disables unicast RPF (uRPF) Check on this interface.
Default
disabled
mode
Syntax mode { strict | loose | strict-no-ecmp }
no mode
Context config>router>if>urpf-check
config>router>if>>ipv6>urpf-check
Description
This command specifies the mode of unicast RPF check.
The no form of the command reverts to the default (strict) mode.
Default
strict
Parameters strict — When specified, uRPF checks whether incoming packet has a source address that matches a
prefix in the routing table, and whether the interface expects to receive a packet with this source
address prefix.
loose — In loose mode, uRPF checks whether incoming packet has source address with a
corresponding prefix in the routing table. However, the loose mode does not check whether the
interface expects to receive a packet with a specific source address prefix. This object is valid
only when
urpf-check is enabled.