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Installation and Getting Started Guide
Table 6.1: IP Global Parameters – routing switches (Continued)
Domain name
for Domain
Name Server
(DNS) resolver
A domain name (example: amaynes.router.com) you
can use in place of an IP address for certain
operations such as IP pings, trace routes, and Telnet
management connections to the router.
None configured 6-21
DNS default
gateway
addresses
A list of gateways attached to the router through
which clients attached to the router can reach DNSs.
None configured 6-21
IP unicast cache
performance
mode
The amount of available IP cache that is set aside for
IP unicast entries. When the router caches unicast
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. nce 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.
Standard 6-60
IP load sharing A feature that enables the router to balance traffic to a
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).
Enabled 6-48
IP load sharing
aggregation
A feature on Chassis devices that increases the
capacity of the load sharing cache by aggregating
destination addresses into networks. When IP load
sharing aggregation is enabled, each cache entry is
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. xed-port devices cache load
sharing entries based on destination host addresses.
On Chassis devices,
aggregated by network
On Fixed-port devices,
single host entries
6-58
Maximum IP
load sharing
paths
The maximum number of equal-cost paths across
which the router is allowed to distribute traffic.
Four 6-59
Parameter Description Default See page...
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