Brocade BigIron RX Series Configuration Guide User Manual
Page 239
BigIron RX Series Configuration Guide
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Basic IP parameters and defaults
7
Directed broadcast
forwarding
A directed broadcast is a packet containing all ones (or in some
cases, all zeros) in the host portion of the destination IP address.
When a router forwards such a broadcast, it sends a copy of the
packet out each of its enabled IP interfaces.
NOTE: You also can enable or disable this parameter on an
individual interface basis. Refer to
Disabled
Directed broadcast
mode
The packet format the router treats as a directed broadcast. The
following formats can be directed broadcast:
•
All ones in the host portion of the packet’s destination
address.
•
All zeroes in the host portion of the packet’s destination
address.
All ones
NOTE: If you enable
all-zeroes directed
broadcasts, all-ones
directed broadcasts
remain enabled.
Source-routed
packet forwarding
A source-routed packet contains a list of IP addresses through
which the packet must pass to reach its destination.
Enabled
Internet Control
Message Protocol
(ICMP) messages
The device can send the following types of ICMP messages:
•
Echo messages (ping messages)
•
Destination Unreachable messages
•
Redirect messages
NOTE: You also can enable or disable ICMP Redirect messages
on an individual interface basis. Refer to
Enabled
ICMP Router
Discovery Protocol
(IRDP)
An IP protocol a router can use to advertise the IP addresses of its
router interfaces to directly attached hosts. You can enable or
disable the protocol, and change the following protocol
parameters:
•
Forwarding method (broadcast or multicast)
•
Hold time
•
Maximum advertisement interval
•
Minimum advertisement interval
•
Router preference level
NOTE: You also can enable or disable IRDP and configure the
parameters on an individual interface basis. Refer to
Disabled
Maximum BootP
relay hops
The maximum number of hops away a BootP server can be
located from a router and still be used by the router’s clients for
network booting.
Four
Maximum Frame
Size
You can set a maximum frame size of IP packets that are
forwarded on all ports of a PPCR.
Domain name for
Domain Name
Server (DNS)
resolver
A domain name (example: company.router.com) you can use in
place of an IP address for certain operations such as IP pings,
trace routes, and Telnet management connections to the router.
None configured
DNS default gateway
addresses
A list of gateways attached to the router through which clients
attached to the router can reach DNSs.
None configured
TABLE 46
IP global parameters (Continued)
Parameter
Description
Default
See page...