Transmit And Receive Control; Lldp Transmit Features; Scheduled Interval; Minimum Interval - IBM RackSwitch G8000 Application Manual

Transmit and Receive Control

LLDP Transmit Features

Scheduled Interval

Minimum Interval

312
RackSwitch G8000: Application Guide
The G8000 can also be configured to transmit or receive LLDP information on a
port-by-port basis. By default, when LLDP is globally enabled on the switch, G8000
ports transmit and receive LLDP information (see the tx_rx option in the following
example). To change the LLDP transmit and receive state, the following commands
are available:
RS G8000(config)# interface port 1
RS G8000(config-if)# lldp admin-status tx_rx
RS G8000(config-if)# lldp admin-status tx_only
RS G8000(config-if)# lldp admin-status rx_only
RS G8000(config-if)# no lldp admin-status
RS G8000(config-if)# exit
To view the LLDP transmit and receive status, use the following commands:
RS G8000(config)# show lldp port
RS G8000(config)# show interface port <n> lldp
Numerous LLDP transmit options are available, including scheduled and minimum
transmit interval, expiration on remote systems, SNMP trap notification, and the
types of information permitted to be shared.
The G8000 can be configured to transmit LLDP information to neighboring devices
once each 5 to 32768 seconds. The scheduled interval is global; the same interval
value applies to all LLDP transmit-enabled ports. However, to help balance LLDP
transmissions and keep them from being sent simultaneously on all ports, each port
maintains its own interval clock, based on its own initialization or reset time. This
allows switch-wide LLDP transmissions to be spread out over time, though
individual ports comply with the configured interval.
The global transmit interval can be configured using the following command:
RS G8000(config)# lldp refresh-interval <interval>
where interval is the number of seconds between LLDP transmissions. The range is
5 to 32768. The default is 30 seconds.
In addition to sending LLDP information at scheduled intervals, LLDP information is
also sent when the G8000 detects relevant changes to its configuration or status
(such as when ports are enabled or disabled). To prevent the G8000 from sending
multiple LLDP packets in rapid succession when port status is in flux, a transmit
delay timer can be configured.
The transmit delay timer represents the minimum time permitted between
successive LLDP transmissions on a port. Any interval-driven or change-driven
updates will be consolidated until the configured transmit delay expires.
(Select a switch port)
(Transmit and receive LLDP)
(Only transmit LLDP)
(Only receive LLDP)
(Do not participate in LLDP)
(Exit port mode)
(status of all ports)
(status of selected port)