HP 6120XG HP ProCurve Series 6120 Blade Switches Multicast and Routing Guide - Page 54

IP Route Exchange Protocols, IP Global Parameters for Routing Switches, Table 3-1.

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IP Routing Features Overview of IP Routing Not e Each entry in the IP forwarding cache has an age timer. The age interval depends on the number of entries in the table. The age timer ranges from 12 seconds (full table) to 36 seconds (empty table). Entries are only aged if they are not being utilized by traffic. If you have an entry that is always being used in hardware, it will never age. If there is no traffic, it will age in 12-36 seconds. The age timer is not configurable. You cannot add static entries to the IP forwarding cache. IP Route Exchange Protocols The switch supports the Routing Information Protocol (RIP). 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 "Configuring RIP" on page 3-25. 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 3-1. IP Global Parameters for Routing Switches Parameter Router ID Address Resolution Protocol (ARP) ARP age Description The value that routers use to identify themselves to other routers when exchanging route information. RIP does not use the router ID. A standard IP mechanism that routers use to learn the Media Access Control (MAC) address of a device on the 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. The amount of time the device keeps a MAC address learned through ARP in the device's ARP cache. The device resets the timer to zero each time the ARP entry is refreshed and removes the entry if the timer reaches the ARP age. (Can be set using the menu interface to be as long as 1440 minutes. Go to Menu > Switch Configuration > IP Config.) See "ARP Age Timer" on page 3-9. Default The lowestnumbered IP address configured on the lowest-numbered routing interface. Enabled Five minutes. See page 3-13 3-14 n/a 3-8

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IP Routing Features
Overview of IP Routing
Each entry in the IP forwarding cache has an age timer. The age interval
depends on the number of entries in the table. The age timer ranges from 12
seconds (full table) to 36 seconds (empty table). Entries are only aged if they
are not being utilized by traffic. If you have an entry that is always being used
in hardware, it will never age. If there is no traffic, it will age in 12-36 seconds.
The age timer is not configurable.
N
o
t
e
You cannot add static entries to the IP forwarding cache.
IP Route Exchange Protocols
The switch supports the Routing Information Protocol (RIP).
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 “Configuring RIP” on page 3-25.
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 3-1.
IP Global Parameters for Routing Switches
Parameter
Description
Default
See page
Router ID
The value that routers use to identify themselves to
other routers when exchanging route information.
RIP does not use the router ID.
The lowest-
numbered IP
address
configured on the
lowest-numbered
routing interface.
3-13
Address
Resolution
Protocol
(ARP)
A standard IP mechanism that routers use to learn
the Media Access Control (MAC) address of a
device on the 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.
Enabled
3-14
ARP age
The amount of time the device keeps a MAC address
learned through ARP in the device’s ARP cache. The
device resets the timer to zero each time the ARP
entry is refreshed and removes the entry if the timer
reaches the ARP age. (Can be set using the menu
interface to be as long as 1440 minutes. Go to Menu
> Switch Configuration > IP Config.)
See “ARP Age Timer” on page 3-9.
Five minutes.
n/a
3-8