Alcatel-Lucent 7210 SAS M Service Manual page 537

arp-timeout
Syntax arp-timeout seconds
no arp-timeout
Context config>service>ies>if
This command configures the minimum time in seconds an ARP entry learned on the IP interface will
Description
be stored in the ARP table. ARP entries are automatically refreshed when an ARP request or
gratuitous ARP is seen from an IP host, otherwise, the ARP entry is aged from the ARP table. If arp-
timeout is set to a value of zero seconds, ARP aging is disabled.
The no form of this command restores arp-timeout to the default value.
14400 seconds
Default
seconds — The minimum number of seconds a learned ARP entry will be stored in the ARP table,
Parameters
allow-directed-broadcasts
Syntax [no] allow-directed-broadcasts
Context config>service>ies>if
This command enables the forwarding of directed broadcasts out of the IP interface. A directed
Description
broadcast is a packet received on a local router interface destined for the subnet broadcast address on
another IP interface. The allow-directed-broadcasts command on an IP interface enables or disables
the transmission of packets destined to the subnet broadcast address of the egress IP interface.
When enabled, a frame destined to the local subnet on this IP interface will be sent as a subnet
broadcast out this interface. Care should be exercised when allowing directed broadcasts as it is a
well-known mechanism used for denial-of-service attacks.
When disabled, directed broadcast packets discarded at this egress IP interface will be counted in the
normal discard counters for the egress SAP.
By default, directed broadcasts are not allowed and will be discarded at this egress IP interface.
The no form of this command disables the forwarding of directed broadcasts out of the IP interface.
no allow-directed-broadcasts — Directed broadcasts are dropped.
Default
7210-SAS M Services Guide
parameter indicates the complete mask that will be used in a logical 'AND' function to derive the
local subnet of the IP address. Allowed values are dotted decimal addresses in the range
128.0.0.0 – 255.255.255.252. Note that a mask of 255.255.255.255 is reserved for system IP
addresses.
expressed as a decimal integer. A value of zero specifies that the timer is inoperative and learned
ARP entries will not be aged.
0 — 65535
Values
Values
IES Service Configuration Commands
Page 537