Cambium Networks cnMatrix EX2028 Handleiding (320 Pagina's)

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L2 Features 63

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The default transmission interval: 30 seconds.

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The default value for hold time-multiplier: 4.

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The default value for reinitialization delay time: 2.

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Transmission/reception of LLDPU is enabled by default.

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The default LLDP version is v2.

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Port description, system name, system description, and system capabilities TLVs are enabled on all

ports.

Prerequisites

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For the basic functionality, no user configuration is necessary. The reception and transmission of

LLDPDUs are enabled by default on all ports.

Enhancements

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Starting with Release 4.0, standard LLDP data supports an automated mechanism to reset non-

responding remote (connected) devices:

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Remote devices are reset by toggling the PoE power status on the device port (power inline

disable or power inline enable). The reset ability does not apply to non-PoE switches.

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Remote devices are considered non-responsive after they are initially learned and the TTL

(advertised mandatory Time to Live TLV) expires. TTL expiration (and the associated reset

action) does NOT occur for link-down and forced remote device deletion (remote device

advertising a TTL = 0) events.

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A new CLI command is defined to enable or disable the support on a per-port basis:

(config-if)# [no] lldp expiration-reset

# show lldp interface CLI command displays the current setting.

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A new LLDP port setting that accessible via the Web interface is available:

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Layer 2 Management > LLDP > Interface Settings.

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The user only needs to enable the support on the appropriate ports (support is disabled by

default).

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The user does not need to establish expiration or reset intervals per-device. The LLDP

standard TTL value serves this purpose. This value is already configured to an appropriate

value on the remote device.

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Remote device expirations are already tracked on a per-port basis (Total Entries Aged). A

reset counter is defined and reported using the same mechanism used to display current

LLDP local port settings (show lldp interface CLI command).

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