Brocade TurboIron 24X Series Configuration Guide User Manual
Page 477
Brocade TurboIron 24X Series Configuration Guide
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53-1003053-01
Basic IP parameters and defaults – Layer 3 Switches
ARP age
The amount of time the device keeps a MAC address
learned through ARP in the device ARP cache. The
device resets the timer to zero each time the ARP
entry is refreshed and removes the entry if the timer
reaches the ARP age.
NOTE: You also can change the ARP age on an
individual interface basis. Refer to
Ten minutes
Proxy ARP
An IP mechanism a router can use to answer an ARP
request on behalf of a host, by replying with the
router own MAC address instead of the host.
Disabled
Static ARP
entries
An ARP entry you place in the static ARP table.
Static entries do not age out.
No entries
Time to Live
(TTL)
The maximum number of routers (hops) through
which a packet can pass before being discarded.
Each router decreases a packet TTL by 1 before
forwarding the packet. If decreasing the TTL causes
the TTL to be 0, the router drops the packet instead
of forwarding it.
64 hops
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
destination address.
•
All zeroes in the host portion of the packet
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 Layer 3 Switch can send the following types of
ICMP messages:
•
Echo messages (ping messages)
•
Destination Unreachable messages
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
TABLE 70
IP global parameters – Layer 3 Switches (Continued)
Parameter
Description
Default
See page...