Installation and Getting Started Guide

Table 6.1: IP Global Parameters – routing switches (Continued)

Parameter

Description

Default

See page...

 

 

 

 

Domain name

A domain name (example: amaynes.router.com) you

None configured

6-21

for Domain

can use in place of an IP address for certain

 

 

Name Server

operations such as IP pings, trace routes, and Telnet

 

 

(DNS) resolver

management connections to the router.

 

 

 

 

 

 

DNS default

A list of gateways attached to the router through

None configured

6-21

gateway

which clients attached to the router can reach DNSs.

 

 

addresses

 

 

 

 

 

 

 

IP unicast cache

The amount of available IP cache that is set aside for

Standard

6-60

performance

IP unicast entries. When the router caches unicast

 

 

mode

forwarding entries, the cached entries provide an

 

 

 

optimal path through the router because the router

 

 

 

CPU does not need to process the packets for

 

 

 

forwarding. Once a packet is processed, the

 

 

 

forwarding information is placed in the cache for

 

 

 

reuse.

 

 

 

Chassis devices provide an optional high­

 

 

 

performance mode for allocating additional cache

 

 

 

space for unicast forwarding entries. Use this option

 

 

 

when the router is handling a very large number of

 

 

 

unicast flows (source plus destination pairs) and you

 

 

 

want to ensure that more flows can remain in the

 

 

 

cache at one time.

 

 

 

 

 

 

IP load sharing

A feature that enables the router to balance traffic to a

Enabled

6-48

 

specific destination across multiple equal-cost paths.

 

 

 

Load sharing uses a simple round-robin mechanism

 

 

 

and is based on destination address.

 

 

 

Note: Load sharing is sometimes called Equal Cost

 

 

 

Multi Path (ECMP).

 

 

 

 

 

 

IP load sharing

A feature on Chassis devices that increases the

On Chassis devices,

6-58

aggregation

capacity of the load sharing cache by aggregating

aggregated by network

 

 

destination addresses into networks. When IP load

On Fixed-port devices,

 

 

sharing aggregation is enabled, each cache entry is

 

 

single host entries

 

 

an aggregate network for multiple destination hosts.

 

 

 

 

 

If IP load sharing aggregation not enabled, the device

 

 

 

creates a separate load sharing cache entry for each

 

 

 

destination host address.

 

 

 

Note: Load sharing aggregation is not available on

 

 

 

Fixed-port devices. Fixed-port devices cache load

 

 

 

sharing entries based on destination host addresses.

 

 

 

 

 

 

Maximum IP

The maximum number of equal-cost paths across

Four

6-59

load sharing

which the router is allowed to distribute traffic.

 

 

paths

 

 

 

 

 

 

 

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