
8-2
User Guide for the Avaya P580 and P882 Multiservice Switches, v6.0
Chapter 8
Physical Port Features
This section describes the following features that are available when
configuring the physical parameters on the ports:
■
■
■
Auto-negotiation
Autonegotiation is an extension of the link test methods used by 10Base-T
and 10Base-FL to verify the integrity of the link between devices.
Autonegotiation advertises a device's abilities by encoding a 16-bit data
packet, called a link code word (LCW), within a burst of 17 to 33 link
pulses, called a fast link pulse (FLP) burst. FLP bursts have an approximate
duration of 2 µs and are transmitted in 16.8 µs intervals (the same interval as
for the normal link pulses used by 10Base-T and 10Base-FL).
However, this does not hold true for the Half Duplex/Full Duplex (HD/FD)
selection. If a non-autonegotiating device running FD is connected to a
negotiating device, the negotiating device runs at HD, and the link does not
operate properly.
* Note: A Gigabit Ethernet device negotiates at HD or FD, speed is
always one Gigabit.
* Note: M5520-TX (P/N M5520-100TX) boards manufactured with a
Quality Phy do not auto-negotiate with Xircom brand adapter
cards. If you have this problem, disable auto-negotiation on the
affected ports, and set the port speed and duplex state
manually.
* Note: You may experience difficulties with auto-negotiation between
some releases of the 10/100Base-TX Module (M5510-100TX,
M5520-100TX, M5510R-100TX, M5512R-100TX) and
adapter cards using physical interfaces manufactured by
National Semiconductor. The symptom is loss of connectivity.
If you do. do one of the following:
•
Disable auto-negotiation
•
Use a patch cable that is longer that 5 meters
* Note: The factory default for the National Phy Mode is
Enable.
The LCW contains two fields (the selector field and the technology ability
field), which together serve to identify a device's capabilities.
Содержание Cajun P580
Страница 26: ...xxvi User Guide for the Avaya P580 and P882 Multiservice Switches v6 0 Preface...
Страница 50: ...1 24 User Guide for the Avaya P580 and P882 Multiservice Switches v6 0 Chapter 1...
Страница 158: ...5 24 User Guide for the Avaya P580 and P882 Multiservice Switches v6 0 Chapter 5...
Страница 308: ...10 18 User Guide for the Avaya P580 and P882 Multiservice Switches v6 0 Chapter 10...
Страница 323: ...Document No 650 100 700 Issue 1 12 7 Configuring IP Routing Figure 12 3 Add IP Interface Web Screen...
Страница 419: ...Document No 650 100 700 Issue 1 13 9 Configuring Access Lists Figure 13 3 IP Extended Access Rule Creation Dialog Box...
Страница 508: ...16 26 User Guide for the Avaya P580 and P882 Multiservice Switches v6 0 Chapter 16...
Страница 530: ...18 14 User Guide for the Avaya P580 and P882 Multiservice Switches v6 0 Chapter 18...
Страница 622: ...21 22 User Guide for the Avaya P580 and P882 Multiservice Switches v6 0 Chapter 21...
Страница 652: ...23 20 User Guide for the Avaya P580 and P882 Multiservice Switches v6 0 Chapter 23...
Страница 660: ...24 8 User Guide for the Avaya P580 and P882 Multiservice Switches v6 0 Chapter 24...
Страница 714: ...25 54 User Guide for the Avaya P580 and P882 Multiservice Switches v6 0 Chapter 25...
Страница 728: ...Appendix B B 4 User Guide for the Avaya P580 and P882 Multiservice Switches v6 0...