Brocade Communications Systems Brocate Ethernet Access Switch 6910 - Manual (Page 967)

Brocade 6910 Ethernet Access Switch Configuration Guide 917
53-1002581-01
Link Layer Discovery Protocol
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• Hold Time Multiplier – Configures the time-to-live (TTL) value sent in LLDP advertisements as
shown in the formula below. (Range: 2-10; Default: 4)
The time-to-live tells the receiving LLDP agent how long to retain all information pertaining to
the sending LLDP agent if it does not transmit updates in a timely manner.
TTL in seconds is based on the following rule:
minimum value ((Transmission Interval * Holdtime Multiplier), or 65535)
Therefore, the default TTL is 4*30 = 120 seconds.
• Delay Interval – Configures a delay between the successive transmission of advertisements
initiated by a change in local LLDP MIB variables. (Range: 1-8192 seconds; Default: 2
seconds)
The transmit delay is used to prevent a series of successive LLDP transmissions during a short
period of rapid changes in local LLDP MIB objects, and to increase the probability that multiple,
rather than single changes, are reported in each transmission.
This attribute must comply with the rule:
(4 * Delay Interval)
≤ Transmission Interval
• Reinitialization Delay – Configures the delay before attempting to re-initialize after LLDP ports
are disabled or the link goes down. (Range: 1-10 seconds; Default: 2 seconds)
When LLDP is re-initialized on a port, all information in the remote systems LLDP MIB
associated with this port is deleted.
• Notification Interval – Configures the allowed interval for sending SNMP notifications about
LLDP MIB changes. (Range: 5-3600 seconds; Default: 5 seconds)
This parameter only applies to SNMP applications which use data stored in the LLDP MIB for
network monitoring or management.
Information about changes in LLDP neighbors that occur between SNMP notifications is not
transmitted. Only state changes that exist at the time of a notification are included in the
transmission. An SNMP agent should therefore periodically check the value of
lldpStatsRemTableLastChangeTime to detect any lldpRemTablesChange notification-events
missed due to throttling or transmission loss.
Interface
To configure LLDP timing attributes:
1. Click Administration, LLDP.
2. Select Configure Global from the Step list.
3. Enable LLDP, and modify any of the timing parameters as required.
4. Click Apply.