IP Routing Features

Overview of IP Routing

IP Route Exchange Protocols

HP Procurve Series 5300XL Switches support the following IP route exchange protocols:

Routing Information Protocol (RIP)

Open Shortest Path First (OSPF)

These protocols provide routes to the IP route table. You can use one or more of these protocols, in any combination. The protocols are disabled by default. For configuration information, see the following:

“Configuring RIP” on page 16-20

“Configuring OSPF” on page 16-33

IP Global Parameters for Routing Switches

The following table lists the IP global parameters and the page where you can find more information about each parameter.

Table 16-1. IP Global Parameters for Routing Switches

Parameter

Description

Default

See page

 

 

 

 

Router ID

The value that routers use to identify themselves to other

The lowest-numbered IP

16-9

 

routers when exchanging route information. OSPF uses the

address configured on

 

 

router ID to identify routers. RIP does not use the router ID.

the lowest-numbered

 

 

 

routing interface.

 

 

 

 

 

Address

A standard IP mechanism that routers use to learn the

Enabled

16-10

Resolution

Media Access Control (MAC) address of a device on the

 

 

Protocol (ARP)

network. The router sends the IP address of a device in

 

 

 

the ARP request and receives the device’s MAC address

 

 

 

in an ARP reply.

 

 

 

 

 

 

ARP age

The amount of time the device keeps a MAC address

Five minutes

not

 

learned through ARP in the device’s ARP cache. The

 

configur­

 

device resets the timer to zero each time the ARP entry is

 

able

 

refreshed and removes the entry if the timer reaches the

 

 

 

ARP age.

 

 

 

 

 

 

Proxy ARP

An IP mechanism a router can use to answer an ARP

Disabled

16-12

 

request on behalf of a host, by replying with the router’s

 

 

 

own MAC address instead of the host’s.

 

 

 

 

 

 

Time to Live

The maximum number of routers (hops) through which a

64 hops

7-11

(TTL)

packet can pass before being discarded. Each router

 

 

 

decreases a packet’s 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.

 

 

 

 

 

 

 

 

 

 

16-6