Network Router User Manual

Brocade ICX 6650 Layer 3 Routing Configuration Guide 7
53-1002603-01
IP configuration overview
Static ARP table
In addition to the ARP cache, Layer 3 Switches have a static ARP table. Entries in the static ARP
table are user-configured. You can add entries to the static ARP table regardless of whether or not
the device the entry is for is connected to the Layer 3 Switch.
NOTE
Layer 3 Switches have a static ARP table. Layer 2 Switches do not.
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.
No. IP Address MAC Address Type Age Port Status
1 192.168.6.111 0000.003b.d210 Static 0 1/1/1 Valid
Each entry lists the information you specified when you created the entry.
Displaying ARP entries
To display ARP entries, refer to the following sections:
• “Displaying the ARP cache” on page 118 – Layer 3 Switch
• “Displaying the static ARP table” on page 120 – Layer 3 Switch only
• “Displaying ARP entries” on page 129 – Layer 2 Switch
To configure other ARP parameters, refer to the following sections:
• “ARP parameter configuration” on page 35 – 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” section in the Brocade ICX 6650 Platform and Layer 2 Switching Configuration
Guide. 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 40 (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