Allied Telesis AR450S Uživatelský manuál stáhnout pdf (Strana 32)

3-32 SET SWITCH PORT AR400 Series Router Software Reference

Software Release 2.6.6

C613-03079-00 REV A

auto MDI/MDI-X mode and this polarity setting is remembered. When the

auto MDI/MDI-X mode is disabled, the polarity setting for the port takes

effect.

The BCLIMIT parameter specifies a limit on the rate of reception of broadcast

packets for the port(s). The value of this parameter represents a per second rate

of packet reception, above which broadcast packets are discarded. If the value

NONE or 0 is specified, then packet rate limiting for broadcast packets is

turned off. If any other value is specified, the reception of broadcast packets is

limited to that number of kilobits per second (Kbps). Whenever packet rate

limits are set, the latest parameter values supersede earlier values. The default

is NONE.

The three sets of options used for packet storm protection are: broadcast limit

(BCLIMIT) only; broadcast limit and multicast limit (BCLIMIT and MCLIMIT);

broadcast limit, multicast limit, and destination lookup failure limit (BCLIMIT,

MCLIMIT, and DLFLIMIT). The limit specified for each option, i.e the number of

kilobits per second (Kbps), must be the same for all modes of storm protection selected.

The limit is set to the most recent limit specified.

The DESCRIPTION parameter can be used to describe the port. It is displayed

by the SHOW SWITCH PORT command, but does not affect the operation of

the router in any way. The default is no description.

The DLFLIMIT parameter specifies a limit on the rate of reception of

destination lookup failure packets for the port. The value of this parameter

represents a per second rate of packet reception, above which destination

lookup failure packets are discarded. If the value NONE or 0 is specified, then

packet rate limiting for destination lookup failure packets is turned off. If any

other value is specified, the reception of destination lookup failure packets is

limited to that number of kilobits per second (Kbps). Whenever packet rate

limits are set, the latest parameter values supersede earlier values. The default

is NONE.

The INFILTERING parameter enables or disables Ingress Filtering of packets

admitted according to the IEEE 802.1Q Mode set on the specified ports. Each

switch port belongs to one or more VLANs. If INFILTERING is set to ON,

Ingress Filtering is enabled and packets received on a specified port are

admitted if the port belongs to the VLAN with which the packets are

associated. Conversely, packets received on the port are discarded if the port

does not belong to the VLAN with which the packets are associated. Untagged

packets are admitted when the port is not a tagged-only port, since the packets

have the numerical VLAN Identifier (VID) of the VLAN that the port is an

untagged member of. If OFF is specified, Ingress Filtering is disabled, and no

packet are discarded by this part of the Ingress Rules. The default is OFF.

The MCLIMIT parameter specifies a limit on the rate of reception of multicast

packets for the port. The value of this parameter represents a per second rate of

packet reception above which multicast packets are discarded. If the value

NONE or 0 is specified, then packet rate limiting for multicast packets is

turned off. If any other value is specified, the reception of multicast packets is

limited to that number of kilobits per second (Kbps). Whenever packet rate

limits are set, the latest parameter values supersede earlier values. The default

is NONE.

The SPEED parameter specifies the configured line speed and duplex mode of

the port(s) (see Table 3-10 on page 3-33). If AUTONEGOTIATE is specified, the

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