Foundry Networks FESX User Manual

Foundry Configuration Guide for the FESX, FSX, and FWSX
16 - 10 © Foundry Networks, Inc. December 2005
Router ID The value that routers use to identify themselves to
other routers when exchanging route information.
OSPF and BGP4 use router IDs to identify routers.
RIP does not use the router ID.
The IP address
configured on the
lowest-numbered
loopback interface.
If no loopback
interface is configured,
then the lowest-
numbered IP address
configured on the
device.
16-23
Maximum
Transmission
Unit (MTU)
The maximum length an Ethernet packet can be
without being fragmented.
1500 bytes for
Ethernet II
encapsulation
1492 bytes for SNAP
encapsulation
16-21
Address
Resolution
Protocol (ARP)
A standard IP mechanism that routers use to learn
the Media Access Control (MAC) address of a device
on the network. The router sends the IP address of a
device in the ARP request and receives the device’s
MAC address in an ARP reply.
Enabled 16-25
ARP rate
limiting
Lets you specify a maximum number of ARP packets
the device will accept each second. If the device
receives more ARP packets than you specify, the
device drops additional ARP packets for the
remainder of the one-second interval.
Disabled 16-26
ARP age The amount of time the device keeps a MAC address
learned through ARP in the device’s 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. See Table 16.3 on
page 16-13.
Ten minutes 16-27
Proxy ARP An IP mechanism a router can use to answer an ARP
request on behalf of a host, by replying with the
router’s own MAC address instead of the host’s.
Disabled 16-27
Static ARP
entries
An ARP entry you place in the static ARP table.
Static entries do not age out.
No entries 16-28
Time to Live
(TTL)
The maximum number of routers (hops) through
which a packet can pass before being discarded.
Each router decreases a packet’s 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 16-29
Table 16.2: IP Global Parameters – Layer 3 Switches (Continued)
Parameter Description Default See page...

Foundry Networks FESX Specifications

General

Brand	Foundry Networks
Model	FESX
Category	Switch
Language	English