Avaya Configuring Ethernet, FDDI, and Token Ring Services Instrukcja Użytkownika Pobierz pdf (Strona 40)

Configuring Ethernet, FDDI, and Token Ring Services

2-16

308623-14.00 Rev 00

If you set the speed-select parameter to 100base-x-fd-cong, flow control is

automatically enabled, and the BCC ignores the value of the fc-enable parameter.

For example, navigate to an Ethernet prompt (

box; ethernet 2/1) and enter:

ethernet/2/1# auto-neg

auto-neg/2/1# speed-select 100base-x-fd-cong

auto-neg/2/1#

If you enable flow control using the fc-enable command, you can set the

parameters described in Table 2-3

For example, to specify a transmitter pause time of 65535, enter the following

commands:

ethernet/2/1# fc-pause-time 65535

ethernet/2/1# pause-zero-enable enable

ethernet/2/1#

Table 2-3. BCC Flow Control Parameters

Parameter/Variable Description

fc-pause-time

<pause_time>

This variable lets you calculate the total time a transmitter

pauses. For example, when a transmitter receives a

pause frame, it pauses for

pause_time

* 512 bit times.

(The value 512 bit times converts to 51.2 ms for

10 Mb/s, 5.12 ms for 100 Mb/s, and 512 ns for Gigabit.)

Therefore, if the pause time is 65535 and the line speed

is 100 Mb/s, then the transmitter pauses for 335.54 ms

(65535 * 5.12 ms).

pause-zero-enable

<state>

This variable lets you enable or disable the ability of a

congested receiver to send a pause frame with a pause

time of 0 when the receiver is no longer congested. When

the remote transmitter receives a pause frame with a 0

pause time, it resumes sending packets.

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Avaya Configuring Ethernet, FDDI, and Token Ring Services Instrukcja Użytkownika Strona 40