Overview of IP routing
The switches offer the following IP routing features:
Static routes
Up to 256 static routes
RIP (Router Information Protocol)
Supports RIP Version 1, Version 1 compatible with Version 2 (default), and Version 2
OSPF (open shortest path first)
The standard routing protocol for handling larger routed networks.
IRDP (ICMP Router Discovery Protocol)
Advertises the IP addresses of the routing interfaces on this switch to directly attached host systems
DHCP Relay
Allows you to extend the service range of your DHCP server beyond its single local network segment
NOTE:
Throughout this chapter, the switches are referred to as "routing switches." When IP routing
is enabled on your switch, it behaves just like any other IP router.
Basic IP routing configuration consists of adding IP addresses, enabling IP routing, and enabling a
route exchange protocol, such as RIP.
To configure the IP addresses, see the
Management and Configuration Guide
for your switch.
Viewing the IP route table
The IP route table is displayed by entering the CLI command
show ip route
from any context level in the
console CLI. Here is an example of an entry in the IP route table:
Increasing ARP age timeout (CLI)
The address resolution protocol (ARP) age is the amount of time the switch keeps a MAC address learned
through ARP in the ARP cache. The switch resets the timer to zero each time the ARP entry is refreshed and
removes the entry if the timer reaches the ARP age.
Syntax:
[no] ip arp-age [[1...1440] | infinite]
Allows the ARP age to be set from 1 to 1440 minutes (24 hours).
If the option
infinite
is configured, the internal ARP age timeout is set to 99,999,999 seconds (approximately
3.2 years). An
arp-age
value of 0 (zero) is stored in the configuration file to indicate that
infinite
has been
configured. This value also displays with the
show
commands and in the menu display (
Switch Configuration IP
Config
).
Chapter 5
Routing Basics
130
Aruba 3810 / 5400R Multicast and Routing Guide for ArubaOS-
Switch 16.08
