Cisco VIP-4R/4T Spécifications télécharger pdf (Page 70)

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101

IP Switching Commands

ip cef load-sharing algorithm

ISW-40

Cisco IOS IP Switching Command Reference

May 2008

Usage Guidelines The original CEF load-balancing algorithm produced distortions in load sharing across multiple routers

because of the use of the same algorithm on every router. When the load-balancing algorithm is set to

universal mode, each router on the network can make a different load sharing decision for each

source-destination address pair, and that resolves load-balancing distortions.

The tunnel algorithm is designed to share the load more fairly when only a few source-destination pairs

are involved.

The include-ports algorithm allows you to use the Layer 4 source and destination ports as part of the

load-balancing decision. This method benefits traffic streams running over equal-cost paths that are not

loadshared because the majority of the traffic is between peer addresses that use different port numbers,

such as Real-Time Protocol (RTP) streams. The include-ports algorithm is available in Cisco

IOS

Release

12.4(11)T and later releases.

Examples The following example shows how to enable the CEF load-balancing algorithm for tunnel environments:

configure terminal

ip cef load-sharing algorithm tunnel

exit

Related Commands Command Description

debug ip cef hash Records CEF load-balancing hash algorithm events

ip load-sharing Enables load balancing for CEF.

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