3Com CoreBuilder 3500, Implementation Manual, Page: 104 / 592

104 C
HAPTER
6: F
IBER
D
ISTRIBUTED
D
ATA
I
NTERFACE
(FDDI)
Setting Neighbor
Notification Timer
The T-notify attribute is a timer that the Neighbor Notification protocol
uses to indicate the interval of time between the generation of Neighbor
Information Frames (NIF). NIF frames allow stations to discover their
upstream and downstream neighbors. The T-notify value has a range of
2 through 30 seconds, with a default value of 30 seconds.
Effects and Consequences
When you set the neighbor notification timer, consider the following:
■
By setting the T-notify value low, your network reacts quickly to station
changes, but more bandwidth is used.
■
By setting the T-notify value high, less bandwidth is used, but your
network does not react to station changes as quickly.
Enabling and
Disabling Status
Reporting
The statusReporting attribute controls whether a station generates Status
Report Frames (SRFs) to report events and conditions to network
management stations. By default, status reporting is
enabled
. If you do
not have an SMT management station that listens to these event reports
or if you use SNMP to monitor FDDI events on all FDDI end-stations, you
can set this attribute to
disabled
so that the station does not generate
SRFs.
FDDI Paths
You can display FDDI path information and set the time values of the
following attributes:
■
tvxLowerBound
■
tmaxLowerBound
■
maxTreq
Setting
tvxLowerBound
The tvxLowerBound attribute specifies the minimum time value of
fddiMAC TvxValue that any MAC that is configured on this path uses. A
MAC uses its valid transmission timer (TVX) to detect and recover from
certain ring errors. If a valid frame has not passed through a MAC during
the time indicated by fddiMACTvxValue, the MAC reinitializes the ring.