Dell BigIron RX Series, Configuration Manual

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136 BigIron RX Series Configuration Guide
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Changing the MAC age time
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As of release 02.4.00, the Nexthop table is user configurable. If the router is installed in a network
where there are many directly connected hosts, then the size of one-path partition should be
increased. To configure the partition, use a command such as the following.
BigIron RX(config)# cam-partition next-hop 2048 1024 512 512
The above command partitions the next-hop table into 2048 one-path, 1024 two-path, 512
four-path and 512 eight-path entries. The two-path count must be a multiple of two. The four-path
count must be a multiple of four and the eight-path count must be a multiple of eight. All values
must be non-zero and the total must be 4096.
This command requires system reload. After the system reboots, the nexthop table on the line
cards are partitioned according to the parameters in above command.
Syntax: cam-partition next-hop <number>
Use the <number> parameter to specify the number of entries for the nexthop.
Use the no cam-partitioning next-hop command to return to the default partitioning.
Changing the MAC age time
The MAC age time sets the aging period for ports on the device, defining how long (how many
seconds) a port address remains active in the address table.
To change the aging period for MAC addresses from the default of 300 seconds to 600 seconds.
BigIron RX(config)# mac-age-time 600
Syntax: [no] mac-age-time <age-time>
The <age-time> can be 0 or a number from 67 – 65535. The zero results in no address aging. The
default is 300 (seconds).
Configuring static ARP entries
When you create a static ARP entry, the device automatically creates a static MAC entry.
NOTE
To delete the static MAC entry, you must delete the static ARP entry first.
For more information, refer to “IP fragmentation protection” on page 185 and “Creating static ARP
entries” on page 191.