TABLE 4 IP global parameters - Layer 2 switches (continued)
Parameter Description Default
NOTE
Layer 2 switches have a single IP
address used for management
access to the entire device. Layer 3
switches have separate IP addresses
on individual interfaces.
NOTE
Some devices have a factory default,
such as 10.157.22.154, used for
troubleshooting during installation.
For Layer 3 switches, the address is
on port 1 (or 1/1/1).
Default gateway The IP address of a locally attached router (or a
router attached to the Layer 2 switch by bridges
or other Layer 2 switches). The Layer 2 switch
and clients attached to it use the default gateway
to communicate with devices on other subnets.
None congured
Address Resolution Protocol (ARP) A standard IP mechanism that networking
devices use to learn the Media Access Control
(MAC) address of another device on the network.
The Layer 2 switch sends the IP address of a
device in the ARP request and receives the
device MAC address in an ARP reply.
Enabled
NOTE
You cannot disable ARP.
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.
Ten minutes
NOTE
You cannot change the ARP age on
Layer 2 switches.
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
Domain name for Domain Name Server (DNS)
resolver
A domain name (example: brocade.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 congured
DNS default gateway addresses A list of gateways attached to the router through
which clients attached to the router can reach
DNSs.
None congured
Source interface The IP address the Layer 2 switch uses as the
source address for Telnet, RADIUS, or TACACS/
TACACS+ packets originated by the router. The
Layer 2 switch uses its management IP address
as the source address for these packets.
The management IP address of the Layer 2
switch.
NOTE
This parameter is not congurable on
Layer 2 switches.
DHCP gateway stamp The device can assist DHCP/BootP Discovery
packets from one subnet to reach DHCP/BootP
servers on a dierent subnet by placing the IP
address of the router interface that forwards the
packet in the packet Gateway eld.
You can specify up to 32 gateway lists. A
gateway list contains up to eight gateway IP
addresses. You activate DHCP assistance by
associating a gateway list with a port.
When you congure multiple IP addresses in a
gateway list, the Layer 2 switch inserts the
None congured
Basic IP parameters and defaults - Layer 2 switches
FastIron Ethernet Switch Layer 3 Routing
36 53-1003627-04
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