Novell NETWARE 6, Руководство пользователя

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Internetwork Packet Exchange
Internetwork Packet Exchange
103-000176-001
August 29, 2001
Novell Confidential
Manual 99a
38
July 17, 2001
Balancing Traffic Loads over Equal-Cost Routes
If a NLSP router has two or more network interfaces with routes to the same
destination, it can distribute outbound traffic among those interfaces for an
effective increase in throughput. This is called
load balancing or load sharing
.
NLSP uses an assigned path cost to select the best route by which to forward
outbound IPX packets. The higher the throughput of the network medium, the
lower the cost of the route.
Table 4 shows the throughput range and default cost of some typical network
media.
Table 4 Throughput Range and Default Cost of Typical Network Media
You can specify up to eight equal-cost routes to a single destination with the
Maximum Number of Path Splits parameter. Two routes are equal in cost if
the cost to the destination is the same for both routes. To equalize the costs of
two interfaces, you set their Cost Override parameter to the same value. By
default, Cost Override is set to 0 for all interfaces, which means that NLSP
uses the default cost associated with the connected medium and throughput
range listed in
Table 4 .
Throughput Range Default Cost Typical Network Media
0-16 Kbps 61 9,600-baud line
48-64 Kbps 45 ISDN (U.S.)
64-128 Kbps 45 ISDN (Europe)
1-2 Mbps 27 Corvus Omninet (1 Mbps), T1 (1.5
Mbps)
2-4 Mbps 26 E1 (2 Mbps), ARCnet (2.5 Mbps)
4-8 Mbps 25 Token ring (4 Mbps), Corvus Omninet
(4 Mbps)
10-16 Mbps 20 Ethernet (10 Mbps)
16-32 Mbps 19 Token ring (16 Mbps)
64-128 Mbps 14 FDDI (100 Mbps), CDDI (100 Mbps)