Dell FCX624-S Laptop User Manual


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788 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Overview
26
The software places an entry from the static ARP table into the ARP cache when the entry interface
comes up.
Here is an example of a static ARP entry.
Index IP Address MAC Address Port
1 207.95.6.111 0800.093b.d210 1/1
Each entry lists the information you specified when you created the entry.
To display ARP entries, refer to the following sections:
“Displaying the ARP cache” on page 874 – Layer 3 Switch
“Displaying the static ARP table” on page 876 – Layer 3 Switch only
“Displaying ARP entries” on page 884 – Layer 2 Switch
To configure other ARP parameters, refer to the following sections:
“Configuring ARP parameters” on page 810 – Layer 3 Switch only
To increase the size of the ARP cache and static ARP table, refer to the following:
For dynamic entries, refer to the section “Displaying and modifying system parameter default
settings” on page 321. The <ip-arp> parameter controls the ARP cache size.
Static entries, “Changing the maximum number of entries the static ARP table can hold” on
page 814 (Layer 3 Switches only). The <ip-static-arp> parameter controls the static ARP table
size.
IP route table
The IP route table contains paths to IP destinations.
NOTE
Layer 2 Switches do not have an IP route table. A Layer 2 Switch sends all packets addressed to
another subnet to the default gateway, which you specify when you configure the basic IP
information on the Layer 2 Switch.
The IP route table can receive the paths from the following sources:
A directly-connected destination, which means there are no router hops to the destination
A static IP route, which is a user-configured route
A route learned through RIP
A route learned through OSPF
A route learned through BGP4
The IP route table contains the best path to a destination:
When the software receives paths from more than one of the sources listed above, the
software compares the administrative distance of each path and selects the path with the
lowest administrative distance. The administrative distance is a protocol-independent value
from 1 through 255.
When the software receives two or more best paths from the same source and the paths have
the same metric (cost), the software can load share traffic among the paths based on
destination host or network address (based on the configuration and the Layer 3 Switch
model).
Here is an example of an entry in the IP route table.