Configuring Ip Parameters - Dell PowerConnect B-RX Configuration Manual

TABLE 42
IP interface parameters (Continued)
Parameter Description
IP Maximum The maximum length (number of bytes) of an encapsulated IP
Transmission Unit datagram the router can forward.
(MTU)
ARP age Locally overrides the global setting. Refer to
page 150.
Metric A numeric cost the router adds to RIP routes learned on the
interface. This parameter applies only to RIP routes.
Directed broadcast Locally overrides the global setting. Refer to
forwarding page 150.
ICMP Router Locally overrides the global IRDP settings. Refer to
Discovery Protocol page 150.
(IRDP)
ICMP Redirect Locally overrides the global setting. Refer to
messages page 150.
DHCP gateway stamp The router can assist DHCP/BootP Discovery packets from one
subnet to reach DHCP/BootP servers on a different subnet by
placing the IP address of the router interface that receives the
request in the request packet's Gateway field.
You can override the default and specify the IP address to use for
the Gateway field in the packets.
NOTE: UDP broadcast forwarding for client DHCP/BootP requests
UDP broadcast The router can forward UDP broadcast packets for UDP
forwarding applications such as BootP. By forwarding the UDP broadcasts,
the router enables clients on one subnet to find servers attached
to other subnets.
NOTE: To completely enable a client's UDP application request to
IP helper address The IP address of a UDP application server (such as a BootP or
DHCP server) or a directed broadcast address. IP helper
addresses allow the router to forward requests for certain UDP
applications from a client on one subnet to a server on another
subnet.
a. Some devices have a factory default, such as 209.157.22.154, used for troubleshooting during installation. For the device, the address is
on module 1 port 1 (or 1/1).

Configuring IP parameters

Some parameters can be configured globally while others can be configured on individual
interfaces. Some parameters can be configured globally and overridden for individual interfaces.
BigIron RX Series Configuration Guide
53-1001810-01
(bootpc) must be enabled and you must configure an IP
helper address (the server's IP address or a directed
broadcast to the server's subnet) on the port connected to
the client.
find a server on another subnet, you must configure an IP
helper address consisting of the server's IP address or the
directed broadcast address for the subnet that contains
the server. See the next row.

Configuring IP parameters

Default
1500 for Ethernet II
encapsulated packets
1492 for SNAP encapsulated
packets
Table 41 on Ten minutes
1 (one)
Table 41 on Disabled
Table 41 on Disabled
Table 41 on Enabled
The lowest-numbered IP
address on the interface that
receives the request
The router helps forward
broadcasts for the following
UDP application protocols:
•
bootps
•
dns
•
netbios-dgm
•
netbios-ns
•
tacacs
•
tftp
•
time
None configured
7
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