Enterasys Networks 6000 Neg. Negotiated, Concentrator M Ports, Concentrator Non-M Ports, MAC Path

FDDI Management

frames (from other issuing stations) and either continues its own bid (and removes the competing Claim Frame from the ring) or defers (halts transmission of its own bid and repeats the competing bid) according to the following hierarchy of arbitration:

•A Claim Frame with the lowest TTRT bid has precedence.

•If the values of TTRT are equal, the frame with the longest source address (48 vs. 16 bits) has precedence.

•If both TTRT value and source address length are equal, the frame with the highest address has precedence.

The HSIM-F6 is shipped with a default T-Req of 6 msec. T-Req is stored within the MIB in units of nanoseconds (one billionth of a second) rather than milliseconds (one thousandth of a second); NetSight Element Manager converts nanoseconds to milliseconds for display purposes. You can use any SNMP Set Request tool to edit the T-Req value; just remember that you must enter your value in nanoseconds, rather than milliseconds.

T-Neg. (Negotiated)

The winning time negotiated in the ring initialization sequence.

Concentrator M Ports

This field displays the number of Master (M) ports on the device that are associated with the selected SMT entity. A Master port is a port that provides a connection for Single Attachment Station (SAS) devices to the FDDI network. The HSIM-F6 does not support M ports, so this field will always display 0.

Concentrator Non-M Ports

This field display the number of non-Master ports (A, B, or S ports) on the device that are associated with the selected SMT entity. As each HSIM-F6 module has a single A /B port pair supporting a single ring (and, therefore, a single SMT entity), this field will display 1.

Number of MACs

The number of Media Access Control entities present on the device associated with the selected SMT entity. For the HSIM-F6, this number will be 1.

MAC Path

Indicates the configuration of the MAC in respect to the logical ring, as determined by the Connection Management (CMT) portion of SMT. CMT controls the establishment of a media attachment to the FDDI network, the connections with other nodes in the ring, and the internal configuration of the various entities within a node. CMT provides the link confidence test, and specifies a Link Error Monitor (LEM) which monitors active links on a per-link basis to ensure that failing links are detected and, if required, removed from the network. Possible values are:

•Primary indicates that the MAC is inserted into the primary path of the currently used FNB ring.

•Secondary indicates that the MAC is inserted into the secondary path of the currently used FNB ring.

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