Red Hat Fedora 5 Unleashed

The Foundation Summary is a collection of information that provides a convenient review of many key concepts in this chapter. If you are already comfortable with the topics in this chapter, this summary can help you recall a few details. If you just read this chapter, this review should help solidify some key facts. If you are doing your final preparation before the exam, this information is a convenient way to review the day before the exam.

Table 8-5. Frame Distribution on an EtherChannel

Channel size

A1: ... xxxxx000

A2: ... xxxxx000

(address bits the same)

A1: ... xxxxx000 A2: ... xxxxx111

(address bits differ)

2-port

Link index: 0 (0) (lowest)

Link index: 1 (1) (highest)

4-port

Link index: 00 (0) (lowest)

Link index: 11 (3) (highest)

8-port

Link index: 000 (0) (lowest)

Link index: 111 (7) (highest)

Example address bits are shown. The XOR operation produces a 0 bit if the two input bits are the same (0,0 or 1,1) and a 1 bit if the two input bits are different (0,1 or 1,0).

Table 8-6. EtherChannel Load-Balancing Methods

method Value

Hash Input

Hash Operation

Switch Model

src-ip

Source IP address

bits

6500/4500/3750/3560/2970

dst-ip

Destination IP address

bits

6500/4500/3750/3560/2970

src-dst-ip

Source and destination IP address

XOR

6500/4500/3750/3560/2970

src-mac

Source MAC address

bits

6500/4500/3750/3560/2970

dst-mac

Destination MAC address

bits

6500/4500/3750/3560/2970

src-dst-mac

Source and destination MAC

XOR

6500/4500/3750/3560/2970

src-port

Source port number

bits

6500/4500

dst-port

Destination port number

bits

6500/4500

src-dst-port

Source and destination port

XOR

6500/4500

Table 8-7. EtherChannel Negotiation Protocols

Negotiation Mode

Negotiation Packets Sent?

Characteristics

 

PAgP

LACP

  

on

on

No

All ports channeling

auto

passive

Yes

Waits to channel until asked

desirable

active

Yes

Actively asks to form a channel

Table 8-8. EtherChannel Configuration Commands

Task

Command Syntax

Select a load-balancing method for the switch

port-channel load-balance method

Use a PAgP mode on an interface

channel-protocol pagp

channel-group number mode {on | {auto | desirable} [non-silent]}

Assign the LACP system priority

lacp system-priority priority

Use an LACP mode on an interface

channel-protocol lacp

channel-group number mode {on | passive | active}

lacp port-priority priority

Related

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