Sifos Technologies PhyView PVA-3000 User Manual

PVA-3000 Reference Manual
December 2, 2019 Sifos Technologies
Page
51
3.9.2. Link Partner Assessment
The Link Partner Assessment meter can be configured to report Link Partner Capability, Link Partner Capability
with Extra Gigabit Parameters, or Auto-Neg and Link-Up Timing metrics.
The default Link Partner Capability mode reports a number of
characteristics of the currently connected port-under-test (see
Figure 3.21). These characteristics are recovered from several
link-up or link-up attempts and include the following
parameters:
 AUTO-NEG: Supports EXTENDED, BASE,
or NO auto-negotiation
 ACKS: Recognizes EXTENDED, BASE, or NO
auto-negotiation
 1000BaseT Support: FULL, HALF, FULL+HALF
(Duplex), or NO
 100BaseTx Support: FULL, HALF, FULL+HALF
(Duplex), or NO
 10BaseT Support: FULL, HALF, FULL+HALF
(Duplex), or NO
 100BaseT4 Support: NO or YES
 PAUSE Support: NO, RESPOND, XMIT, or RESPOND+XMIT
 LINK_OK Indication: YES, FAULT, GIG_ERR, or N/A (not available)
 Rx_OK Indication: NO, YES, or N/A (not available)
 MDI_MDI-X Support: AUTO, MDI_ONLY, or MDI-X_ONLY
MASTER_SLAVE Support: AUTO, MASTER_ONLY, SLAVE_ONLY, or N/A (not applicable)
NLP_LINK Support: LINKED, UNLINKED (link to non-auto- negotiating partner)
Figure 3.21 depicts the outcome of Link Partner Assessment
with a full featured 10/100/1000Base-T port and separately an
older 100Base-Tx, MDI-only Ethernet port.
In Figure 3.22, the Link Partner Assessment is first run with
the Gig Extras option selected. This option produces
additional information specific to 1000Base-T.
 STATUS: Indicates 1000Base-T Auto-Neg is
COMPLETE or NOT_COMPLETE
 DET_FAULT: Indicates if link rate is properly
determined (RATE_RESOLVED) or not (DET_FAULT)
 MASTER_FAULT: Indicate problem (FAULT) with
gigabit auto-neg given local port configured as MASTER
 SLAVE_FAULT: Indicate problem (FAULT) with
gigabit auto-neg given local port configured as SLAVE
 AUTO_MS_FAULT: Indicate problem (FAULT) with gigabit auto-neg given local port configured to auto-
negotiation MASTER/SLAVE
 MASTER_TIME: Time, in seconds, for PVA port to auto-negotiate as MASTER in a gigabit link-up
 SLAVE_TIME: Time, in seconds, for PVA port to auto-negotiate as SLAVE in a gigabit link-up
 TRAIN_TIME: Time, in seconds, for the MASTER/SLAVE timing resolution to complete
In Figure 3.22, the Link Partner Assessment is also run with Auto-Neg/Link-Up Timing option selected. This meter
analyzes the time from a physical (wire) connection until physical layer link-up is completed. The metering offers
approximately 20msec of resolution and assesses a 10Base-T link-up, a 100Base-T link-up, an 1000Base-T link-up, and
a fully auto-negotiated (rate) link-up.
Link-Up timing measurements can be a valuable indicator of the “health” of the complete auto-negotiation process.
Auto-Negotiation is a complex sequence of processing by both link partners and historically has been subject to
interoperability problems. Generally, a reliable 10/100 link should occur consistently in well less than one second and
a reliable 1000Base-T link should occur consistently in less than 2 seconds. For further information regarding
assessment of 10/100/1000 Auto-Negotiation, see Sifos application note Auto-Neg Analysis with the PhyView
Analyzer.
Figure 3.21 Link Partner Assessment
Figure 3.22
Gig Extras Capability & Link-Up Timing

Sifos Technologies PhyView PVA-3000 Specifications

General

Brand	Sifos Technologies
Model	PhyView PVA-3000
Category	Measuring Instruments
Language	English